With IPHost Network Monitor you can run simple snmp requests against a Cisco device in your network.
cdot11SecAuxSsidVlan
Cisco Dot11 Security Auxiliary Service Set Identifier Vlan
1.3.6.1.4.1.9.9.413.1.1.1.1.6
This object defines the VLAN trunk at which the traffic will be used when a client is associating with this SSID. The default value is '0', no VLAN is configured or used for this SSID.
Back to CISCO-DOT11-SSID-SECURITY-MIB MIB page.
IPHost Network monitor allows you to monitor cdot11SecAuxSsidVlan 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.