With IPHost Network Monitor you can run simple snmp requests against a Cisco device in your network.
parTrkLoadTable
par Trk Load Table
1.3.6.1.4.1.351.130.2.3
Trunk Load Information
Back to CISCO-WAN-PAR-MIB MIB page.
IPHost Network monitor allows you to monitor parTrkLoadTable on Cisco device via the SNMP protocol. Download IPHost Network Monitor (500 monitors for 30 days, 50 monitors free forever) to start monitoring Cisco multiplexers right now.