With IPHost Network Monitor you can run simple snmp requests against a Cisco device in your network.
cvpdnTunnelAttrTable
cvpdn Tunnel Attr Table
1.3.6.1.4.1.9.10.24.1.2.2
Table of information about the active VPDN tunnels. An entry is added to the table when a new tunnel is initiated and removed from the table when the tunnel is terminated.
Back to CISCO-VPDN-MGMT-MIB MIB page.
IPHost Network monitor allows you to monitor cvpdnTunnelAttrTable 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.