With IPHost Network Monitor you can run simple snmp requests against a Cisco device in your network.
cefInconsistencyPrefixAddr
CISCO Express Forwarding Inconsistency Prefix Address
1.3.6.1.4.1.9.9.492.1.7.3.1.3
The network prefix address associated with this inconsistency record. The type of this address is determined by the value of the cefInconsistencyPrefixType object.
Back to CISCO-CEF-MIB MIB page.
IPHost Network monitor allows you to monitor cefInconsistencyPrefixAddr 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.