diff --git a/includes/polling/ports.inc.php b/includes/polling/ports.inc.php
index 45e48ba3a6..e661b1955d 100644
--- a/includes/polling/ports.inc.php
+++ b/includes/polling/ports.inc.php
@@ -320,6 +320,10 @@ if ($device['os'] == 'junos') {
     require_once 'ports/junos-vcp.inc.php';
 }
 
+if ($device['os'] == 'edgecos') {
+    require_once 'ports/edgecos.inc.php';
+}
+
 if (Config::get('enable_ports_adsl')) {
     $device['xdsl_count'] = dbFetchCell("SELECT COUNT(*) FROM `ports` WHERE `device_id` = ? AND `ifType` in ('adsl','vdsl')", [$device['device_id']]);
 }
diff --git a/includes/polling/ports/edgecos.inc.php b/includes/polling/ports/edgecos.inc.php
new file mode 100644
index 0000000000..863120725c
--- /dev/null
+++ b/includes/polling/ports/edgecos.inc.php
@@ -0,0 +1,33 @@
+<?php
+/**
+* edgecos.inc.php
+*
+* LibreNMS Edgecos Ports fix
+*
+* Fix the problem that EdgeCore did not follow the ifOperStatus convention
+*
+* 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  2019 Ming-Han Yang
+* @author     Ming-Han Yang <soto2080edu@g.ncu.edu.tw>
+*/
+foreach ($port_stats as & $port) {
+    if ($port['ifOperStatus'] == 'lowerLayerDown') {
+        $port['ifOperStatus'] = 'down';
+    }
+}
+unset($port);
+d_echo($port_stats);