With IPHost Network Monitor you can run simple snmp requests against a Cisco device in your network.
cwspCallOtherIntfVpi
cwsp Call Other Intf Vpi
1.3.6.1.4.1.351.140.1.2.8.1.1.10
This object shows the VPI of the call on the partner interface.
Back to CISCO-WAN-SVC-MIB MIB page.
IPHost Network monitor allows you to monitor cwspCallOtherIntfVpi on Cisco device via the SNMP protocol. Download IPHost Network Monitor (500 monitors for 30 days, 50 monitors free forever) to start monitoring Cisco routers right now.