With IPHost Network Monitor you can run simple snmp requests against a Cisco device in your network.
cd11IfMultipleBssidEnable
Cisco DOT11 Interfaces Multiple Bssid Enable
1.3.6.1.4.1.9.9.272.1.1.1.1.1.16
If it is 'true', multiple broadcast SSID is enabled on the radio. To a wireless client, a MBSSID AP appears to be several distinct co-located APs, and it transmits a beacon for each broadcast SSID or SSID. This allows all of the SSIDs visible for passive scanning.
Back to CISCO-DOT11-IF-MIB MIB page.
IPHost Network monitor allows you to monitor cd11IfMultipleBssidEnable on Cisco device via the SNMP protocol. Download IPHost Network Monitor (500 monitors for 30 days, 50 monitors free forever) to start monitoring Cisco wireless switches right now.