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%FIB-3-NOMEM: Malloc Failure, disabling CEF,

My router is restarting with the following error

%FIB-3-NOMEM: Malloc Failure, disabling CEF,

-Traceback= 0x154BD60 0x10519A0

HW details NGP G2


MPLS BGP is running this is PE router


Re: %FIB-3-NOMEM: Malloc Failure, disabling CEF,


As per Cisco:

A memory shortage has caused an internal software error. CEF switching has been disabled on the specified slot.

Recommended Action: Enter the clear cef linecard slot command. Next, check the status of the line card by entering the show cef linecard command. If this message recurs, copy the message exactly as it appears on the console or in the system log. Research and attempt to resolve the issue using the tools and utilities provided at With some messages, these tools and utilities will supply clarifying information. Search for resolved software issues using the Bug Toolkit at If you still require assistance, open a case with the Technical Assistance Center via the Internet at, or contact your Cisco technical support representative and provide the representative with the information you have gathered. Attach the following information to your case in nonzipped, plain-text (.txt) format: the output of the show logging and show tech-support commands and your pertinent troubleshooting logs. chnical support representative, and provide the representative with the information you have gathered.

You can visit the bellow CEF-Related Error Messages for troubleshooting,



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Re: %FIB-3-NOMEM: Malloc Failure, disabling CEF,

sh mem

Probably, you have a memory leak.

Hall of Fame Super Gold

Re: %FIB-3-NOMEM: Malloc Failure, disabling CEF,

Hi, the IOS you are using has many bugs, for stable operation of 7200 I recommend use of 12.2S and nothing else.

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