With IPHost Network Monitor you can run simple snmp requests against a Cisco device in your network.
parTrkLineLoad
par Trk Line Load
1.3.6.1.4.1.351.130.2.2.1.33
Specifies the bandwidth used by the connections routed over the trunk.
Back to CISCO-WAN-PAR-MIB MIB page.
IPHost Network monitor allows you to monitor parTrkLineLoad 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.