With IPHost Network Monitor you can run simple snmp requests against a Cisco device in your network.
pnniPtseLifeTime
pnni Ptse Life Time
1.3.6.1.4.1.353.5.4.1.1.13.1.6
The value of the remaining lifetime for the given PTSE as it appears in the local topology database.
Back to PNNI-MIB MIB page.
IPHost Network monitor allows you to monitor pnniPtseLifeTime 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.