With IPHost Network Monitor you can run simple snmp requests against a Cisco device in your network.
cvVrfListVrfIndex
Cisco Voice Vrf List Vrf Index
1.3.6.1.4.1.9.9.711.1.1.2.1.3
This object indicates the associated VRF in the cvVrfTable. The value of this object is index value (cvVrfIndex) of cvVrfTable. The value of this object cannot be modified when the entry is in active(1) state.
Back to CISCO-VRF-MIB MIB page.
IPHost Network monitor allows you to monitor cvVrfListVrfIndex 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.