nanog mailing list archives
Re: cef/process switching problem
From: Rodney Dunn <rodunn () cisco com>
Date: Tue, 9 Sep 2003 12:10:42 -0400
ACL's are done in the CEF path also as long as you don't have the "log" keyword on it that causes a punt. Check the 'sh int stat' from the ingress interfaces and see which ones are showing inbound process hits. Rodney On Tue, Sep 09, 2003 at 10:33:54AM -0500, Austad, Jay wrote:
It's 12.2 code. show ip int e0 shows that CEF is enabled on the interface. Supposedly 12.2's CEF also handles policy routing (which is not being used on this router).-----Original Message----- From: Jason Frisvold [mailto:friz () corp ptd net] Sent: Tuesday, September 09, 2003 10:24 AM To: Austad, Jay Cc: nanog () merit edu Subject: Re: cef/process switching problem Not sure on the MC3810 (never used one), but I know that many of the other Cisco routers didn't do CEF on ethernet until later revisions of code... There are other factors that kick it out of CEF as well.. I believe ACL's and Route Maps are 2 of them.. On Tue, 2003-09-09 at 11:07, Austad, Jay wrote:I've got a cisco MC3810 with a bunch of DSL customers on it. CEF is enabled, but when I do a show int stat, I see that almost100% of theoutbound packets on the ethernet interface are processswitched, and notbeing matched in the route cache. The Input looks justfine, and the otherinterfaces are borderline (usually 50% hit rate on thecache or a littleless). CPU is sitting pretty high on this box during the day, andI have strongsuspicions that this is why. :) I can't seem to find any info on why this would behappening or how tofigure out what's going on. Anyone have any suggestions? -jay-- --------------------------- Jason H. Frisvold Backbone Engineering Supervisor Penteledata Engineering friz () corp ptd net RedHat Engineer - RHCE # 807302349405893 Cisco Certified - CCNA # CSCO10151622 MySQL Core Certified - ID# 205982910 --------------------------- "Imagination is more important than knowledge. Knowledge is limited. Imagination encircles the world." -- Albert Einstein [1879-1955]
Current thread:
- cef/process switching problem Austad, Jay (Sep 09)
- Re: cef/process switching problem Jason Frisvold (Sep 09)
- <Possible follow-ups>
- RE: cef/process switching problem Austad, Jay (Sep 09)
- Re: cef/process switching problem Rodney Dunn (Sep 09)
- RE: cef/process switching problem Michel Py (Sep 10)