How to Configure Cisco Express Forwarding CEF or distributed CEF is enabled globally by default. If for some reason it is disabled, you can re-enable it by using the ip cef or ip cef distributed global configuration command. Procedure Protocol-Independent Features How to Configure Cisco Express Forwarding Command or Action Purpose Step 1 configure terminal Example: Device# configure terminal Enters global configuration mode. Step 2 ip cef Example: Device(config)# ip cef Enables CEF operation on a non-stacking switch. Go to Step 4. Step 3 ip cef distributed Example: Device(config)# ip cef distributed Enables CEF operation on a active switch. Step 4 interface interface-id Example:
Device(config)# interface gigabitethernet 1/0/1 Enters interface configuration mode, and specifies the Layer 3 interface to configure. Step 5 ip route-cache cef Example: Device(config-if)# ip route-cache cef Enables CEF on the interface for software-forwarded traffic. Note The ip route-cache cef command is enabled by default and it cannot be disabled. Step 6 end Example: Device(config-if)# end Returns to privileged EXEC mode. Step 7 show ip cef Example: Device# show ip cef Displays the CEF status on all interfaces. Protocol-Independent Features 3