Explanation: An internal software error has occurred because of an IPC problembetween the LC and the RP. 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 the status shows that the line card is still disabled, disable and reenable dCEF and check the status of the line card again.
Check out the below link for command to do the same :-
Re: FIB-DFC4-3-NOMEM: Malloc Failure, disabling DCEF on linecard
Thanks for that.
I take it there is no way just to enable DCEF only on the line card?
re-enabling DCEF globally flush and rebuild the tables for the entire
switch, or just the line card that DCEF is currently not runnning on?
It would be good to know what sort of impact this command might have etc.
As per the cisco it says to enable or disable the dcef on line card and generally there are no adverse side effects from enabling CEF.The main one to watch out for is that certain debugging will not work for packets that are fast switched CEF is a "fast" switching method that allows the processing effort required to "switch" a packet to be substantially reduced when compared to the traditional method of simply looking up the routing table for each packet.
It has the advantage over the other methods of NOT needing to process switch the first packet to each destination and can also I suspect do per destination and per packet load balancing
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