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Community Member

Cisco 831 CEF Problem

Hi,

I have problem to enable CEF on my Cisco 831 router (2Eth+4FastEth ports). As I can conclude, default IOS on it (12.3(2)XE3) supports CEF, but I have problem with enabling. When I type "IP CEF" in config mode, router stop responding for a few seconds, and after that in "sh ip cef" output I get "%CEF not running". I would be grateful for the answer.

1 ACCEPTED SOLUTION

Accepted Solutions
Silver

Re: Cisco 831 CEF Problem

You're running a pretty obscure version of IOS. Upgrade to either a 12.3T or 12.4 mainline release and see if you have better luck.

3 REPLIES
Silver

Re: Cisco 831 CEF Problem

You're running a pretty obscure version of IOS. Upgrade to either a 12.3T or 12.4 mainline release and see if you have better luck.

Community Member

Re: Cisco 831 CEF Problem

I've replaced my IOS with 12.4(8), and now I can enable CEF on my router. Thank You for the answer.

Re: Cisco 831 CEF Problem

Hi

In addition to the other post you can make use of the below link to find out the exact ios code to have the required feature in your router..

http://tools.cisco.com/ITDIT/CFN/jsp/index.jsp

regds

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