With IPHost Network Monitor you can run simple snmp requests against a Cisco device in your network.
cvInterfaceEntry
Cisco Voice Interface Entry
1.3.6.1.4.1.9.9.711.1.2.2.1
An entry in this table represents an interface on which the vNET trunking can be enabled. When an interface is enabled for vNET trunking, it will carry the traffic for the VRFs which are tagged with the vNET tag.
Back to CISCO-VRF-MIB MIB page.
IPHost Network monitor allows you to monitor cvInterfaceEntry on Cisco device via the SNMP protocol. Download IPHost Network Monitor (500 monitors for 30 days, 50 monitors free forever) to start monitoring Cisco multiplexers right now.
