With IPHost Network Monitor you can run simple snmp requests against a Cisco device in your network.
cvpdnSystemTunnelTotal
cvpdn System Tunnel Total
1.3.6.1.4.1.9.10.24.1.1.4.1.2
The total number of VPDN tunnels that are currently active of this tunnel type.
Back to CISCO-VPDN-MGMT-MIB MIB page.
IPHost Network monitor allows you to monitor cvpdnSystemTunnelTotal 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.