With IPHost Network Monitor you can run simple snmp requests against a Cisco device in your network.
cpsIfVlanIndex
cps If Vlan Index
1.3.6.1.4.1.9.9.315.1.2.4.1.1
The ID of a VLAN within this trunk port.
Back to CISCO-PORT-SECURITY-MIB MIB page.
IPHost Network monitor allows you to monitor cpsIfVlanIndex 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.