With IPHost Network Monitor you can run simple snmp requests against a Cisco device in your network.
cnfTopFlowsLastSwitched
cnf Top Flows Last Switched
1.3.6.1.4.1.9.9.387.1.7.8.1.17
Time flow was last switched.
Back to CISCO-NETFLOW-MIB MIB page.
IPHost Network monitor allows you to monitor cnfTopFlowsLastSwitched on Cisco device via the SNMP protocol. Download IPHost Network Monitor (500 monitors for 30 days, 50 monitors free forever) to start monitoring Cisco firewalls right now.