7507 VRF and CEF/Fast Switching

Unanswered Question
Apr 28th, 2007

I'm running into a problem with a 7507 router running 12.4 where any vlan subinterfaces inside a VRF is being process switched instead of CEF or fast switched. I've verified that the source and destination addresses are valid in the cef FIB but for some reason it's falling back to process switching. Any ideas?

I've attached the config and the output of all the show commands I can think would be related.

For a test instance, packets from source traveling to are process switched, as are packets from to

I have this problem too.
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bjornarsb Mon, 04/30/2007 - 05:47


Depending of which 12.4 version you are running, you should have a look at this bug:

CSCsd00206: "Packets Are getting process switched instead of cef or fast switching"

First Found-in Version: 12.4,




aerogroup Mon, 04/30/2007 - 05:52

I'm running the newest 12.4(13b). According to bugtracker it looks like it's supposed to be fixed in 12.4(7.17)T and 12.4(7.17)M, is my understanding correct that the 12.4M fixes would be incorporated into 12.4 mainline?

Cisco IOS Software, RSP Software (RSP-JK9O3SV-M), Version 12.4(13b), RELEASE SOFTWARE (fc3)

Technical Support: http://www.cisco.com/techsupport

Copyright (c) 1986-2007 by Cisco Systems, Inc.

Compiled Wed 25-Apr-07 06:26 by prod_rel_team


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