Command:

ip route-cache cef


Mode:

Router(config-if)#


Syntax:

ip route-cache cef

no ip route-cache cef

Syntax Description:

This command has no arguments or keywords.


Command Description:

To enable Cisco Express Forwarding (CEF) operation on an interface after CEF operation has been disabled, use the ip route-cache cef interface configuration command. To disable CEF operation on an interface, use the no form of this command. CEF is advanced Layer 3 switching technology for IP. CEF optimizes network performance and scalability for networks with dynamic, topologically dispersed traffic patterns, such as those associated with Web-based applications and interactive type sessions. All interfaces supporting CEF or dCEF are enabled by default when you enable standard CEF or dCEF operation globally. You use the no form of the command to turn off CEF operation on a particular interface. Some interfaces do not support CEF or dCEF and you may want to disable CEF or DCEF on that particular interface. For example, policy routing and CEF cannot be used together. You might want one interface to support policy routing while the other interfaces support CEF. In this case, you would turn on CEF globally, but turn off CEF on the interface configured for policy routing. This enables all but one interface to express forward.


Example:
Router(config-if)#ip route-cache cef

Misconceptions:
None

Related Commands:
ip route-cache
show ip cache

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