With IPHost Network Monitor you can run simple snmp requests against a Cisco device in your network.
cnfPSInactive
cnf PS Inactive
1.3.6.1.4.1.9.9.387.1.5.3.1.6
This is a summation of inactive time of all flows belonging to the same protocol and port in milliseconds. The time between the last switched packet and expiry of a flow is measured as the inactive time of a flow.
Back to CISCO-NETFLOW-MIB MIB page.
IPHost Network monitor allows you to monitor cnfPSInactive 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.