cef/process switching problem

Wed Sep 10 18:08:25 UTC 2003

> Jay Austad 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?

I just troubleshoot something similar on a 7500 and it turned out that
the culprit was the "traffic-shape rate" interface command. Using
"rate-limit output" instead solved it. Whether or not this is your
issue, it's likely to be an interface-level setting on the egress
Ethernet interface.

Michel.