With IPHost Network Monitor you can run simple snmp requests against a Cisco device in your network.
mplsL3VpnVrfConfLastChanged
mpls L3 Vpn Vrf Conf Last Changed
The value of sysUpTime at the time of the last change of this table entry, which includes changes of VRF parameters defined in this table or addition or deletion of interfaces associated with this VRF.
Back to MPLS-L3VPN-STD-MIB MIB page.
IPHost Network monitor allows you to monitor mplsL3VpnVrfConfLastChanged on Cisco device via the SNMP protocol. Download IPHost Network Monitor (500 monitors for 30 days, 50 monitors free forever) to start monitoring Cisco optical switches right now.