[61909] in North American Network Operators' Group
RE: cef/process switching problem
daemon@ATHENA.MIT.EDU (Austad, Jay)
Tue Sep 9 11:34:34 2003
From: "Austad, Jay" <JAustad@temgweb.com>
To: 'Jason Frisvold' <friz@corp.ptd.net>,
"Austad, Jay" <JAustad@temgweb.com>
Cc: nanog@merit.edu
Date: Tue, 9 Sep 2003 10:33:54 -0500
Errors-To: owner-nanog-outgoing@merit.edu
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 almost
> 100% of the
> > outbound packets on the ethernet interface are process
> switched, and not
> > being matched in the route cache. The Input looks just
> fine, and the other
> > interfaces are borderline (usually 50% hit rate on the
> cache or a little
> > less).
> >
> > CPU is sitting pretty high on this box during the day, and
> I have strong
> > suspicions that this is why. :)
> >
> > I can't seem to find any info on why this would be
> happening or how to
> > figure 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]
>
