With IPHost Network Monitor you can run simple snmp requests against a Cisco device in your network.
cefCfgOperState
CISCO Express Forwarding Configuration Operation State
1.3.6.1.4.1.9.9.492.1.4.1.1.2
The current operational state of CEF. If the cefCfgAdminState is disabled(2), then cefOperState will eventually go to the down(2) state unless some error has occurred. If cefCfgAdminState is changed to enabled(1) then cefCfgOperState should change to up(1) only if the CEF entity is ready to forward the packets using Cisco Express Forwarding (CEF) else it should remain in the down(2) state. The up(1) state for this object indicates that CEF entity is forwarding the packet using Cisco Express Forwarding.
Back to CISCO-CEF-MIB MIB page.
IPHost Network monitor allows you to monitor cefCfgOperState on Cisco device via the SNMP protocol. Download IPHost Network Monitor (500 monitors for 30 days, 50 monitors free forever) to start monitoring Cisco optical switches right now.