With IPHost Network Monitor you can run simple snmp requests against a Cisco device in your network.
parTrkEntry
par Trk Entry
1.3.6.1.4.1.351.130.2.2.1
Entries for logical interfaces configured as trunks (parIfType nni).
Back to CISCO-WAN-PAR-MIB MIB page.
IPHost Network monitor allows you to monitor parTrkEntry on Cisco device via the SNMP protocol. Download IPHost Network Monitor (500 monitors for 30 days, 50 monitors free forever) to start monitoring Cisco optical switches right now.