With IPHost Network Monitor you can run simple snmp requests against a Cisco device in your network.
mplsL3VpnActiveVrfs
mpls L3 Vpn Active Vrfs
The number of VRFs that are active on this node. That is, those VRFs whose corresponding mplsL3VpnVrfOperStatus object value is equal to operational (1).
Back to MPLS-L3VPN-STD-MIB MIB page.
IPHost Network monitor allows you to monitor mplsL3VpnActiveVrfs on Cisco device via the SNMP protocol. Download IPHost Network Monitor (500 monitors for 30 days, 50 monitors free forever) to start monitoring Cisco firewalls right now.