diff --git a/includes/discovery/os/ios.inc.php b/includes/discovery/os/ios.inc.php
index 1cdaa1aa5..731d68bf0 100644
--- a/includes/discovery/os/ios.inc.php
+++ b/includes/discovery/os/ios.inc.php
@@ -21,6 +21,11 @@ if (empty($os)) {
     if (strstr($sysDescr, 'IOS XR')) {
         $os = 'iosxr';
     }
+
+    $extra_mibs = array(
+        "ciscoAAASessionMIB" => "CISCO-AAA-SESSION-MIB",
+    );
+    register_mibs($device, $extra_mibs, "includes/discovery/os/ios.inc.php");
 }
 
 // Fallback case
diff --git a/includes/discovery/os/routeros.inc.php b/includes/discovery/os/routeros.inc.php
index 5e35eb7f7..a5e407cd5 100644
--- a/includes/discovery/os/routeros.inc.php
+++ b/includes/discovery/os/routeros.inc.php
@@ -18,4 +18,10 @@ if (!$os) {
     if ($sysDescr == 'RB260GS') {
         $os = 'routeros';
     }
+
+    // poll Cisco AAA MIB
+    $extra_mibs = array(
+        "ciscoAAASessionMIB" => "CISCO-AAA-SESSION-MIB",
+    );
+    register_mibs($device, $extra_mibs, "includes/discovery/os/routeros.inc.php");
 }