With IPHost Network Monitor you can run simple snmp requests against a Cisco device in your network.
cefStatsPrefixHCElements
CISCO Express Forwarding Statistics Prefix HC Elements
1.3.6.1.4.1.9.9.492.1.8.1.1.9
Total number of elements in the FIB database for the specified IP prefix length. This object is a 64-bit version of cefStatsPrefixElements.
Back to CISCO-CEF-MIB MIB page.
IPHost Network monitor allows you to monitor cefStatsPrefixHCElements 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.