Enabling and Disabling CEF or dCEF
Enable CEF when your router has interface processors that do not support CEF.
To enable or disable CEF, use one of the following commands in global configuration mode:
| Command | Purpose |
|---|---|
| ip cef | Enables standard CEF operation. |
| no ip cef | Disables standard CEF operation |
Enable dCEF when you want your line cards to perform express forwarding so that the route processor can handle routing protocols or switch packets from legacy interface processors.
Note
On the Cisco 12000 series routers, dCEF is enabled by default. The command to enable dCEF is not available. Also, the configuration file does not list that dCEF is enabled on the router.
To enable or disable dCEF operation, use one of the following commands in ...
Get Cisco IOS 12.0 Switching Services now with the O’Reilly learning platform.
O’Reilly members experience books, live events, courses curated by job role, and more from O’Reilly and nearly 200 top publishers.
