diff --git a/includes/common.php b/includes/common.php
index b0cd6c7af0..af127932c5 100644
--- a/includes/common.php
+++ b/includes/common.php
@@ -699,4 +699,19 @@ function get_graph_subtypes($type) {
     return $types;
 }
 
+/*
+ * @return rounded value to 10th/100th/1000th depending on input (valid: 10, 100, 1000)
+ */
+function round_Nth($val = 0, $round_to) {
+    if (($round_to == "10") || ($round_to == "100") || ($round_to == "1000")) {
+        $diff = $val % $round_to;
+        if ($diff >= ($round_to / 2)) {
+            $ret = $val + ($round_to-$diff);
+        } else {
+            $ret = $val - $diff;
+        }
+        return $ret;
+    }
+} 
+
 ?>
diff --git a/includes/discovery/fanspeeds/extreme.inc.php b/includes/discovery/fanspeeds/extreme.inc.php
index cd11b11d0c..983172d850 100644
--- a/includes/discovery/fanspeeds/extreme.inc.php
+++ b/includes/discovery/fanspeeds/extreme.inc.php
@@ -16,10 +16,11 @@ if ($device['os'] == 'xos') {
         $oid = "1.3.6.1.4.1.1916.1.1.1.9.1.4.$index";
         $value = snmp_get($device, $oid, '-Oqv', 'EXTREME-BASE-MIB');
         $descr = "Fan Speed $modindex";
-        $high_limit      = ($value * 1.5);
-        $high_warn_limit = ($value * 1.25);
-        $low_warn_limit  = ($value * 0.75);
-        $low_limit       = ($value * 0.5);
+        // round function used to round limit values to hundreds to avoid h/w/l limits being changed on every discovery as a change of 1rpm for fan speed would cause the limit values to change since they're dynamically calculated
+        $high_limit      = round_Nth(($value * 1.5), 100);
+        $high_warn_limit = round_Nth(($value * 1.25), 100);
+        $low_warn_limit  = round_Nth(($value * 0.75), 100);
+        $low_limit       = round_Nth(($value * 0.5), 100);
         if (is_numeric($value)) {
             discover_sensor($valid['sensor'], 'fanspeed', $device, $oid, $index, 'extreme-fanspeed', $descr, '1', '1', $low_limit, $low_warn_limit, $high_warn_limit, $high_limit, $value);
         }
diff --git a/includes/discovery/mempools/extreme.inc.php b/includes/discovery/mempools/extreme.inc.php
new file mode 100644
index 0000000000..45d35f6977
--- /dev/null
+++ b/includes/discovery/mempools/extreme.inc.php
@@ -0,0 +1,12 @@
+<?php
+
+if ($device['os'] == 'xos') {
+    echo 'EXTREME-SOFTWARE-MONITOR-MIB';
+
+    $total = str_replace('"', "", snmp_get($device, "1.3.6.1.4.1.1916.1.32.2.2.1.2.1", '-OvQ'));
+    $avail = str_replace('"', "", snmp_get($device, "1.3.6.1.4.1.1916.1.32.2.2.1.3.1", '-OvQ'));
+
+    if ((is_numeric($total)) && (is_numeric($avail))) {
+        discover_mempool($valid_mempool, $device, 0, 'extreme-mem', 'Dynamic Memory', '1', null, null);
+    }
+}
diff --git a/includes/discovery/power/extreme.inc.php b/includes/discovery/power/extreme.inc.php
index 2e10dc557f..cb1e34c6f9 100644
--- a/includes/discovery/power/extreme.inc.php
+++ b/includes/discovery/power/extreme.inc.php
@@ -8,9 +8,9 @@ if ($device['os'] == 'xos') {
     $oid     = "1.3.6.1.4.1.1916.1.1.1.40.1.0"; // extremeSystemPowerUsage
     $value   = snmp_get($device, $oid, '-Oqv', 'EXTREME-BASE-MIB');
     $divisor = "1000";
-    $value	 = ($value / $divisor); // Nasty hack to divide the first value by 1000 since the divisor only works for polling after the sensor has been added
 
     if (is_numeric($value)) {
+        $value	 = ($value / $divisor); // Nasty hack to divide the first value by 1000 since the divisor only works for polling after the sensor has been added
         discover_sensor($valid['sensor'], 'power', $device, $oid, '1', 'extreme-power', $descr, $divisor, 1, null, null, null, null, $value); // No limits have been specified since all equipment is different and will use different amount of Watts
     }
 }
diff --git a/includes/discovery/processors/extreme.inc.php b/includes/discovery/processors/extreme.inc.php
new file mode 100644
index 0000000000..01ecce519f
--- /dev/null
+++ b/includes/discovery/processors/extreme.inc.php
@@ -0,0 +1,18 @@
+<?php
+
+//
+// Hardcoded discovery of CPU usage on Extreme devices.
+//
+// iso.3.6.1.4.1.1916.1.32.1.4.1.9.1 = STRING: "7.3"
+if ($device['os'] == 'xos') {
+    echo 'EXTREME-BASE-MIB';
+
+    $descr = 'Processor';
+    $usage = str_replace('"', "", snmp_get($device, '1.3.6.1.4.1.1916.1.32.1.4.1.9.1', '-OvQ', 'EXTREME-BASE-MIB'));
+
+    if (is_numeric($usage)) {
+        discover_processor($valid['processor'], $device, '1.3.6.1.4.1.1916.1.32.1.4.1.9.1', '0', 'extreme-cpu', $descr, '100', $usage, null, null);
+    }
+}
+
+unset($processors_array);
diff --git a/includes/polling/mempools/extreme-mem.inc.php b/includes/polling/mempools/extreme-mem.inc.php
new file mode 100644
index 0000000000..747270db78
--- /dev/null
+++ b/includes/polling/mempools/extreme-mem.inc.php
@@ -0,0 +1,12 @@
+<?php
+
+if ($device['os'] == 'xos') {
+    echo 'EXTREME-SOFTWARE-MONITOR-MIB';
+
+    $total = str_replace('"', "", snmp_get($device, "1.3.6.1.4.1.1916.1.32.2.2.1.2.1", '-OvQ'));
+    $avail = str_replace('"', "", snmp_get($device, "1.3.6.1.4.1.1916.1.32.2.2.1.3.1", '-OvQ'));
+
+    $mempool['total'] = ($total * 1024);
+    $mempool['free']  = ($avail * 1024);
+    $mempool['used']  = (($total - $avail) * 1024);
+}
diff --git a/includes/polling/os/extremeware.inc.php b/includes/polling/os/extremeware.inc.php
index 94509495a2..5ce0263c2c 100644
--- a/includes/polling/os/extremeware.inc.php
+++ b/includes/polling/os/extremeware.inc.php
@@ -22,12 +22,17 @@ if (!strpos($poll_device['sysDescr'], 'XOS')) {
 else {
     // ExtremeXOS version 12.4.1.7 v1241b7 by release-manager on Sat Mar 13 02:36:57 EST 2010
     // ExtremeWare XOS version 11.5.2.10 v1152b10 by release-manager on Thu Oct 26 09:53:04 PDT 2006
+    // ExtremeXOS (X670-48x) version 15.5.2.9 v1552b9-patch1-5 by release-manager on Thu Sep 11 13:03:04 EDT 2014
     echo " XOS \n";
-    list($a,$b,$c,$d,$e,$f,$g,$h,$i,$j,$k,$l,$m) = explode(' ', str_replace('ExtremeWare XOS', 'ExtremeXOS', $poll_device['sysDescr']));
+    list($a,$b,$c,$d,$e,$f,$g,$h,$i,$j,$k,$l,$m,$n) = explode(' ', str_replace('ExtremeWare XOS', 'ExtremeXOS', $poll_device['sysDescr']));
     if ($b == 'version') {
         $version  = $c;
         $features = $d.' '.$i.' '.$j.' '.$m;
     }
+    if ($c == 'version') {
+        $version  = $d;
+        $features = $e.' '.$j.' '.$k.' '.$n;
+    }
 }
 
 $hardware = rewrite_extreme_hardware($poll_device['sysObjectID']);
diff --git a/includes/polling/processors/extreme-cpu.inc.php b/includes/polling/processors/extreme-cpu.inc.php
new file mode 100644
index 0000000000..f45d63f24c
--- /dev/null
+++ b/includes/polling/processors/extreme-cpu.inc.php
@@ -0,0 +1,15 @@
+<?php
+
+//
+// Hardcoded polling of CPU usage on Extreme devices due to the lack of multiplier for CPU usage.
+//
+// iso.3.6.1.4.1.1916.1.32.1.4.1.9.1 = STRING: "7.3"
+if ($device['os'] == 'xos') {
+    $usage = str_replace('"', "", snmp_get($device, '1.3.6.1.4.1.1916.1.32.1.4.1.9.1', '-OvQ', 'EXTREME-BASE-MIB'));
+
+    if (is_numeric($usage)) {
+        $proc = ($usage * 100);
+//substr(snmp_get($device, '1.3.6.1.4.1.1916.1.32.1.4.1.9.1', '-Ovq', 'EXTREME-BASE-MIB'), 0, 2);
+    }
+}
+
diff --git a/includes/rewrites.php b/includes/rewrites.php
index b300d3211c..37ecf5b715 100644
--- a/includes/rewrites.php
+++ b/includes/rewrites.php
@@ -394,7 +394,7 @@ $rewrite_extreme_hardware = array(
     '.1.3.6.1.4.1.1916.2.90'  => 'Summit X250-24x',
     '.1.3.6.1.4.1.1916.2.92'  => 'Summit X250-48p',
     '.1.3.6.1.4.1.1916.2.91'  => 'Summit X250-48t',
-    '.1.3.6.1.4.1.1916.2.93'  => 'Summit X250e-24t (3-Stack)',
+    '.1.3.6.1.4.1.1916.2.93'  => 'Summit X250/X450-24 (3-Stack)',
     '.1.3.6.1.4.1.1916.2.88'  => 'Summit X250e-24t (Single)',
     '.1.3.6.1.4.1.1916.2.66'  => 'Summit X450-24t',
     '.1.3.6.1.4.1.1916.2.65'  => 'Summit X450-24x',
@@ -412,6 +412,8 @@ $rewrite_extreme_hardware = array(
     '.1.3.6.1.4.1.1916.2.129' => 'NWI-e450a',
     '.1.3.6.1.4.1.1916.2.133' => 'Summit x480-48t',
     '.1.3.6.1.4.1.1916.2.141' => 'Summit x480-48x',
+    '.1.3.6.1.4.1.1916.2.167' => 'Summit x670-48x',
+    '.1.3.6.1.4.1.1916.2.168' => 'Summit x670v-48x',
 );
 
 $rewrite_ironware_hardware = array(
@@ -665,6 +667,7 @@ $rewrite_ironware_hardware = array(
     'snFESX624P'                             => 'FESX624POE+2XG-PREM',
     'snFWSX424'                              => 'FWSX24G',
     'snFWSX424Switch'                        => 'FWSX424',
+    'FWSX24GSwitch'                          => 'FWSX424',
     'snFWSX424Router'                        => 'FWSX424',
     'snFWSX424Plus1XG'                       => 'FWSX24G + 1 10G',
     'snFWSX424Plus1XGSwitch'                 => 'FWSX424+1XG',
@@ -846,6 +849,7 @@ $rewrite_ironware_hardware = array(
     'snCer2048C'                             => 'NetIron CER 2048C',
     'snCer2048FX'                            => 'NetIron CER 2048F + 2x10G',
     'snCer2048CX'                            => 'NetIron CER 2048C + 2x10G',
+    'snTI2X24Router'                         => 'Stackable TurboIron-X24',
 );
 
 $rewrite_ios_features = array(