With IPHost Network Monitor you can run simple snmp requests against a Cisco device in your network.
cvVrfListTable
Cisco Voice Vrf List Table
1.3.6.1.4.1.9.9.711.1.1.2
This table contains the entries representing the VRFs in a VRF List.
Back to CISCO-VRF-MIB MIB page.
IPHost Network monitor allows you to monitor cvVrfListTable on Cisco device via the SNMP protocol. Download IPHost Network Monitor (500 monitors for 30 days, 50 monitors free forever) to start monitoring Cisco firewalls right now.