With IPHost Network Monitor you can run simple snmp requests against a Cisco device in your network.
cnfTopFlowsDstPort
cnf Top Flows Dst Port
1.3.6.1.4.1.9.9.387.1.7.8.1.11
Destination port number.
Back to CISCO-NETFLOW-MIB MIB page.
IPHost Network monitor allows you to monitor cnfTopFlowsDstPort on Cisco device via the SNMP protocol. Download IPHost Network Monitor (500 monitors for 30 days, 50 monitors free forever) to start monitoring Cisco switches right now.