With IPHost Network Monitor you can run simple snmp requests against a Cisco device in your network.
cvpdnTunnelSessionModemSlotIndex
cvpdn Tunnel Session Modem Slot Index
1.3.6.1.4.1.9.10.24.1.3.1.1.13
The Modem Pool database slot index if it is associated with this user session. Only a session with device of type asyncInternalModem will have a valid value for this object.
Back to CISCO-VPDN-MGMT-MIB MIB page.
IPHost Network monitor allows you to monitor cvpdnTunnelSessionModemSlotIndex on Cisco device via the SNMP protocol. Download IPHost Network Monitor (500 monitors for 30 days, 50 monitors free forever) to start monitoring Cisco optical switches right now.