With IPHost Network Monitor you can run simple snmp requests against a Cisco device in your network.
cvVrfIfNotifEnable
Cisco Voice Vrf If Notif Enable
1.3.6.1.4.1.9.9.711.1.3.1
This object indicates whether the device should generate notifications related to VRF Interface status change.
Back to CISCO-VRF-MIB MIB page.
IPHost Network monitor allows you to monitor cvVrfIfNotifEnable 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.