With IPHost Network Monitor you can run simple snmp requests against a Cisco device in your network.
mplsVpnActiveVrfs
mpls Vpn Active Vrfs
1.3.6.1.3.118.1.1.2
The number of VRFs which are active on this node. That is, those VRFs whose corresponding mplsVpnVrfOperStatus object value is equal to operational (1).
Back to MPLS-VPN-MIB MIB page.
IPHost Network monitor allows you to monitor mplsVpnActiveVrfs 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.