With IPHost Network Monitor you can run simple snmp requests against a Cisco device in your network.
pnniIfVPCapability
pnni If VP Capability
1.3.6.1.4.1.353.5.4.1.1.8.1.4
Indicates whether the interface is capable of having VPCs established within it or not. This object may only have the value `true' for physical ATM interfaces, i.e. those with an ifType of atm(37).
Back to PNNI-MIB MIB page.
IPHost Network monitor allows you to monitor pnniIfVPCapability on Cisco device via the SNMP protocol. Download IPHost Network Monitor (500 monitors for 30 days, 50 monitors free forever) to start monitoring Cisco switches right now.