With IPHost Network Monitor you can run simple snmp requests against a Cisco device in your network.
cefFESelectionEntry
CISCO Express Forwarding FE Selection Entry
1.3.6.1.4.1.9.9.492.1.3.1.1
If CEF is enabled on the Managed device, each entry contain a CEF forwarding element selection list. entPhysicalIndex is also an index for this table which represents entities of 'module' entPhysicalClass which are capable of running CEF.
Back to CISCO-CEF-MIB MIB page.
IPHost Network monitor allows you to monitor cefFESelectionEntry 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.