With IPHost Network Monitor you can run simple snmp requests against a Cisco device in your network.
cfmFlowEgress
Cisco Flow Monitor Flow Egress
1.3.6.1.4.1.9.9.692.1.2.1.1.13
This object identifies the port that transmits the traffic for this traffic flow.
Back to CISCO-FLOW-MONITOR-MIB MIB page.
IPHost Network monitor allows you to monitor cfmFlowEgress 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.