With IPHost Network Monitor you can run simple snmp requests against a Cisco device in your network.
mplsL3VpnVrfVpnId
mpls L3 Vpn Vrf Vpn Id
The VPN ID as specified in [RFC2685]. If a VPN ID has not been specified for this VRF, then this variable SHOULD be set to a zero-length OCTET STRING.
Back to MPLS-L3VPN-STD-MIB MIB page.
IPHost Network monitor allows you to monitor mplsL3VpnVrfVpnId on Cisco device via the SNMP protocol. Download IPHost Network Monitor (500 monitors for 30 days, 50 monitors free forever) to start monitoring Cisco routers right now.