With IPHost Network Monitor you can run simple snmp requests against a Cisco device in your network.
pnniMapAddrAdvertisedPortId
pnni Map Address Advertised Port Id
1.3.6.1.4.1.353.5.4.1.1.16.1.2
The port identifier used from the advertising node to reach the given address prefix.
Back to PNNI-MIB MIB page.
IPHost Network monitor allows you to monitor pnniMapAddrAdvertisedPortId 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.