With IPHost Network Monitor you can run simple snmp requests against a Cisco device in your network.
parTrkId
par Trk Id
1.3.6.1.4.1.351.130.2.2.1.1
This object specifies the logical trunk number associated with the trunk at the local node.
Back to CISCO-WAN-PAR-MIB MIB page.
IPHost Network monitor allows you to monitor parTrkId 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.