With IPHost Network Monitor you can run simple snmp requests against a Cisco device in your network.
cdot11SecSsidBackupVlan
Cisco Dot11 Security Service Set Identifier Backup Vlan
1.3.6.1.4.1.9.9.413.1.1.7.1.1
The backup VLAN configured on a SSID identified by the instance identifier value of cdot11SecAuxSsid.
Back to CISCO-DOT11-SSID-SECURITY-MIB MIB page.
IPHost Network monitor allows you to monitor cdot11SecSsidBackupVlan on Cisco device via the SNMP protocol. Download IPHost Network Monitor (500 monitors for 30 days, 50 monitors free forever) to start monitoring Cisco routers right now.