With IPHost Network Monitor you can run simple snmp requests against a Cisco device in your network.
cseL3FlowLearnFailures
CISCO SWITCH ENGINE L3 Flow Learn Failures
1.3.6.1.4.1.9.9.97.1.4.1.1.6
Number of flows that failed to be learned because the Layer 3 flow table in this switching engine was full.
Back to CISCO-SWITCH-ENGINE-MIB MIB page.
IPHost Network monitor allows you to monitor cseL3FlowLearnFailures 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.
