diff --git a/includes/discovery/discovery-protocols.inc.php b/includes/discovery/discovery-protocols.inc.php
index 343cf9f0aa..17dbfe4623 100644
--- a/includes/discovery/discovery-protocols.inc.php
+++ b/includes/discovery/discovery-protocols.inc.php
@@ -96,7 +96,8 @@ unset($lldp_array);
 if ($device['os'] == 'pbn' && $config['autodiscovery']['xdp'] === true) {
 
     echo ' NMS-LLDP-MIB: '; 
-    $lldp_array  = snmpwalk_cache_oid($device, 'lldpRemoteSystemsData', array(), 'NMS-LLDP-MIB');
+    $mibdir = $config['mibdir'].'/pbn'.':'.$config['mibdir'];
+    $lldp_array  = snmpwalk_cache_oid($device, 'lldpRemoteSystemsData', array(), 'NMS-LLDP-MIB', $mibdir);
     d_echo($lldp_array);
     if ($lldp_array) {
         unset($lldp_links);
diff --git a/includes/discovery/mempools/pbn.inc.php b/includes/discovery/mempools/pbn.inc.php
index 1a95b81148..1737cc7957 100644
--- a/includes/discovery/mempools/pbn.inc.php
+++ b/includes/discovery/mempools/pbn.inc.php
@@ -10,7 +10,8 @@ if ($device['os'] == 'pbn') {
     // specified MIB supported since build 16607
     if ($version[build] >= 16607) {
 
-        $usage = snmp_get($device, 'NMS-MEMORY-POOL-MIB::nmsMemoryPoolUtilization.0', '-OUvQ');
+        $mibdir = $config['mibdir'].'/pbn'.':'.$config['mibdir'];
+        $usage = snmp_get($device, 'nmsMemoryPoolUtilization.0', '-OUvQ', 'NMS-MEMORY-POOL-MIB', $mibdir);
 
         if (is_numeric($usage)) {
             discover_mempool($valid_mempool, $device, 0, 'pbn-mem', 'Main Memory', '100', null, null);
diff --git a/includes/discovery/processors/pbn.inc.php b/includes/discovery/processors/pbn.inc.php
index ada6c6cbdd..ada86365b1 100644
--- a/includes/discovery/processors/pbn.inc.php
+++ b/includes/discovery/processors/pbn.inc.php
@@ -11,7 +11,8 @@ if ($device['os'] == 'pbn') {
         echo 'PBN : ';
 
         $descr = 'Processor';
-        $usage = snmp_get($device, 'NMS-PROCESS-MIB::nmspmCPUTotal5min.1', '-OUvQ');
+        $mibdir = $config['mibdir'].'/pbn'.':'.$config['mibdir'];
+        $usage = snmp_get($device, 'nmspmCPUTotal5min.1', '-OUvQ', 'NMS-PROCESS-MIB', $mibdir);
 
         if (is_numeric($usage)) {
             discover_processor($valid['processor'], $device, 'NMS-PROCESS-MIB::nmspmCPUTotal5min', '0', 'pbn-cpu', $descr, '100', $usage, null, null);
diff --git a/includes/polling/functions.inc.php b/includes/polling/functions.inc.php
index a6fbfa4594..e917a7cf6f 100644
--- a/includes/polling/functions.inc.php
+++ b/includes/polling/functions.inc.php
@@ -10,6 +10,13 @@ function poll_sensor($device, $class, $unit) {
         $sensor_value = '';
 
         if ($sensor['poller_type'] == 'snmp') {
+            if ($device['os'] == 'pbn') {
+                $mibdir = $config['mibdir'].'/pbn'.':'.$config['mibdir'];
+                }
+            else {
+                $mibdir = $config['mibdir'];
+            }
+
             if ($device['os'] == 'siklu') {
                 $mib = ':RADIO-BRIDGE-MIB';
             }
@@ -29,7 +36,7 @@ function poll_sensor($device, $class, $unit) {
                     for ($i = 0; $i < 5; $i++) {
                         d_echo("Attempt $i ");
 
-                        $sensor_value = trim(str_replace('"', '', snmp_get($device, $sensor['sensor_oid'], '-OUqnv', "SNMPv2-MIB$mib")));
+                        $sensor_value = trim(str_replace('"', '', snmp_get($device, $sensor['sensor_oid'], '-OUqnv', "SNMPv2-MIB$mib", $mibdir)));
                         preg_match('/[\d\.]+/', $sensor_value, $temp_response);
                         if (!empty($temp_response[0])) {
                             $sensor_value = $temp_response[0];
@@ -44,7 +51,7 @@ function poll_sensor($device, $class, $unit) {
                 }//end if
             }
             else if ($class == 'state') {
-                $sensor_value = trim(str_replace('"', '', snmp_walk($device, $sensor['sensor_oid'], '-Oevq', 'SNMPv2-MIB')));
+                $sensor_value = trim(str_replace('"', '', snmp_walk($device, $sensor['sensor_oid'], '-Oevq', 'SNMPv2-MIB', $mibdir)));
                 if (!is_numeric($sensor_value)) {
                     $state_value = dbFetchCell('SELECT `state_value` FROM `state_translations` LEFT JOIN `sensors_to_state_indexes` ON `state_translations`.`state_index_id` = `sensors_to_state_indexes`.`state_index_id` WHERE `sensors_to_state_indexes`.`sensor_id` = ? AND `state_translations`.`state_descr` LIKE ?', array($sensor['sensor_id'], $sensor_value));
                     d_echo('State value of ' . $sensor_value . ' is ' . $state_value . "\n");
@@ -56,10 +63,10 @@ function poll_sensor($device, $class, $unit) {
             else if ($class == 'signal') {
                $currentOS = $device['os'];
                include "includes/polling/signal/$currentOS.inc.php";
-               $sensor_value = trim(str_replace('"', '', snmp_get($device, $sensor['sensor_oid'], '-OUqnv', "SNMPv2-MIB$mib")));
+               $sensor_value = trim(str_replace('"', '', snmp_get($device, $sensor['sensor_oid'], '-OUqnv', "SNMPv2-MIB$mib", $mibdir)));
            }
             else if ($class == 'dbm') {
-                $sensor_value = trim(str_replace('"', '', snmp_get($device, $sensor['sensor_oid'], '-OUqnv', "SNMPv2-MIB$mib")));
+                $sensor_value = trim(str_replace('"', '', snmp_get($device, $sensor['sensor_oid'], '-OUqnv', "SNMPv2-MIB$mib", $mibdir)));
                 //iosxr does not expose dbm values through SNMP so we convert Watts to dbm to have a nice graph to show
                 if ($device['os'] == "iosxr") {
                     $sensor_value = round(10*log10($sensor_value/1000),3);
@@ -67,13 +74,14 @@ function poll_sensor($device, $class, $unit) {
             }
             else {
                 if ($sensor['sensor_type'] == 'apc') {
-                    $sensor_value = trim(str_replace('"', '', snmp_walk($device, $sensor['sensor_oid'], '-OUqnv', "SNMPv2-MIB:PowerNet-MIB$mib")));
+                    $sensor_value = trim(str_replace('"', '', snmp_walk($device, $sensor['sensor_oid'], '-OUqnv', "SNMPv2-MIB:PowerNet-MIB$mib", $mibdir)));
                 }
                 else {
-                    $sensor_value = trim(str_replace('"', '', snmp_get($device, $sensor['sensor_oid'], '-OUqnv', "SNMPv2-MIB$mib")));
+                    $sensor_value = trim(str_replace('"', '', snmp_get($device, $sensor['sensor_oid'], '-OUqnv', "SNMPv2-MIB$mib", $mibdir)));
                 }
             }//end if
             unset($mib);
+            unset($mibdir);
         }
         else if ($sensor['poller_type'] == 'agent') {
             if (isset($agent_sensors)) {
diff --git a/includes/polling/mempools/pbn-mem.inc.php b/includes/polling/mempools/pbn-mem.inc.php
index c078426725..1947efd364 100644
--- a/includes/polling/mempools/pbn-mem.inc.php
+++ b/includes/polling/mempools/pbn-mem.inc.php
@@ -10,8 +10,9 @@ if ($device['os'] == 'pbn') {
 
     // specified MIB supported since build 16607
     if ($version[build] >= 16607) {
-        $perc     = snmp_get($device, "NMS-MEMORY-POOL-MIB::nmsMemoryPoolUtilization.0", '-OUvQ');
-        $memory_available = snmp_get($device, "NMS-MEMORY-POOL-MIB::nmsMemoryPoolTotalMemorySize.0", '-OUvQ');
+        $mibdir = $config['mibdir'].'/pbn'.':'.$config['mibdir'];
+        $perc = snmp_get($device, 'nmsMemoryPoolUtilization.0', '-OUvQ', 'NMS-MEMORY-POOL-MIB', $mibdir);
+        $memory_available = snmp_get($device, 'nmsMemoryPoolTotalMemorySize.0', '-OUvQ', 'NMS-MEMORY-POOL-MIB', $mibdir);
         $mempool['total'] = $memory_available;
 
         if (is_numeric($perc)) {
diff --git a/includes/polling/processors/pbn-cpu.inc.php b/includes/polling/processors/pbn-cpu.inc.php
index d97d86fa6a..bbe42892b1 100644
--- a/includes/polling/processors/pbn-cpu.inc.php
+++ b/includes/polling/processors/pbn-cpu.inc.php
@@ -11,7 +11,8 @@ if ($device['os'] == 'pbn') {
     // specified MIB supported since build 16607
     if ($version[build] >= 16607) {
 
-        $usage = snmp_get($device, 'NMS-PROCESS-MIB::nmspmCPUTotal5min.1', '-OUvQ');
+        $mibdir = $config['mibdir'].'/pbn'.':'.$config['mibdir'];
+        $usage = snmp_get($device, 'nmspmCPUTotal5min.1', '-OUvQ', 'NMS-PROCESS-MIB', $mibdir);
 
         if (is_numeric($usage)) {
             $proc = ($usage * 100);
diff --git a/mibs/NMS-IF-MIB.MIB b/mibs/pbn/NMS-IF-MIB.MIB
similarity index 100%
rename from mibs/NMS-IF-MIB.MIB
rename to mibs/pbn/NMS-IF-MIB.MIB
diff --git a/mibs/NMS-LLDP b/mibs/pbn/NMS-LLDP
similarity index 100%
rename from mibs/NMS-LLDP
rename to mibs/pbn/NMS-LLDP
diff --git a/mibs/NMS-MEMORY-POOL-MIB.MIB b/mibs/pbn/NMS-MEMORY-POOL-MIB.MIB
similarity index 100%
rename from mibs/NMS-MEMORY-POOL-MIB.MIB
rename to mibs/pbn/NMS-MEMORY-POOL-MIB.MIB
diff --git a/mibs/NMS-PROCESS-MIB.MIB b/mibs/pbn/NMS-PROCESS-MIB.MIB
similarity index 100%
rename from mibs/NMS-PROCESS-MIB.MIB
rename to mibs/pbn/NMS-PROCESS-MIB.MIB
diff --git a/mibs/NMS-QOS-PIB-MIB.MIB b/mibs/pbn/NMS-QOS-PIB-MIB.MIB
similarity index 100%
rename from mibs/NMS-QOS-PIB-MIB.MIB
rename to mibs/pbn/NMS-QOS-PIB-MIB.MIB
diff --git a/mibs/NMS-SMI b/mibs/pbn/NMS-SMI
similarity index 100%
rename from mibs/NMS-SMI
rename to mibs/pbn/NMS-SMI
diff --git a/mibs/NMS-TC.MIB b/mibs/pbn/NMS-TC.MIB
similarity index 100%
rename from mibs/NMS-TC.MIB
rename to mibs/pbn/NMS-TC.MIB
diff --git a/mibs/PBN-MIB b/mibs/pbn/PBN-MIB
similarity index 100%
rename from mibs/PBN-MIB
rename to mibs/pbn/PBN-MIB
diff --git a/mibs/PBN-ROOT b/mibs/pbn/PBN-ROOT
similarity index 100%
rename from mibs/PBN-ROOT
rename to mibs/pbn/PBN-ROOT