With IPHost Network Monitor you can run simple snmp requests against a Cisco device in your network.
cvVrfInterfaceType
Cisco Voice Vrf Interface Type
1.3.6.1.4.1.9.9.711.1.2.1.1.2
The VRF type of this interface. The type of the interface is determined based on the VRF associated with this interface. If the VRF is not tagged with vnet tag then the type will be vrfEdge. If the VRF is tagged with vnet tag then it will become vnetEdge. For vNETTrunkSI, the sub-interface in question is automatically created for a VRF when trunking is enabled on the main interface.
Back to CISCO-VRF-MIB MIB page.
IPHost Network monitor allows you to monitor cvVrfInterfaceType 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.