With IPHost Network Monitor you can run simple snmp requests against a Cisco device in your network.
pnniDTLPortId
pnni DTL Port Id
1.3.6.1.4.1.353.5.4.1.1.19.3.1.4
The port from the pnniDTLNodeId to use as the exit. If the DTL stack does not care, this is coded as zero.
Back to PNNI-MIB MIB page.
IPHost Network monitor allows you to monitor pnniDTLPortId on Cisco device via the SNMP protocol. Download IPHost Network Monitor (500 monitors for 30 days, 50 monitors free forever) to start monitoring Cisco firewalls right now.