With IPHost Network Monitor you can run simple snmp requests against a Cisco device in your network.
pnniIfNodeIndex
pnni If Node Index
1.3.6.1.4.1.353.5.4.1.1.8.1.1
Identifies the node within the switching system that the interface is directly attached to. The value zero is not a valid value.
Back to PNNI-MIB MIB page.
IPHost Network monitor allows you to monitor pnniIfNodeIndex 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.