With IPHost Network Monitor you can run simple snmp requests against a Cisco device in your network.
cefFIBSummaryFwdPrefixes
CISCO Express Forwarding FIB Summary Forward Prefixes
1.3.6.1.4.1.9.9.492.1.1.1.1.1.2
Total number of forwarding Prefixes in FIB for the IP version specified by cefFIBIpVersion object.
Back to CISCO-CEF-MIB MIB page.
IPHost Network monitor allows you to monitor cefFIBSummaryFwdPrefixes on Cisco device via the SNMP protocol. Download IPHost Network Monitor (500 monitors for 30 days, 50 monitors free forever) to start monitoring Cisco mobile switches right now.