With IPHost Network Monitor you can run simple snmp requests against a Cisco device in your network.
cefStatsPrefixDeletes
CISCO Express Forwarding Statistics Prefix Deletes
1.3.6.1.4.1.9.9.492.1.8.1.1.6
Number of delete operations performed to the FIB database for the specified IP prefix length.
Back to CISCO-CEF-MIB MIB page.
IPHost Network monitor allows you to monitor cefStatsPrefixDeletes 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.