With IPHost Network Monitor you can run simple snmp requests against a Cisco device in your network.
cseCacheUtilization
CISCO SWITCH ENGINE Cache Utilization
1.3.6.1.4.1.9.9.97.1.4.4.1.1
Flow utilization level in percentage in this switching engine. It includes the flow entries for both unicast and multicast. The lighter the utilization level, the less risk of dropping flows, i.e. the higher success-rate of flow insertion.
Back to CISCO-SWITCH-ENGINE-MIB MIB page.
IPHost Network monitor allows you to monitor cseCacheUtilization on Cisco device via the SNMP protocol. Download IPHost Network Monitor (500 monitors for 30 days, 50 monitors free forever) to start monitoring Cisco routers right now.