Drew Weaver wrote:
Howdy,
I've been having some issues with queue drops/CLI sluggishness on a
6500 and I wanted to check what kind of volume of traffic I was
getting punted to the RP.
I made a span session and began checking out the traffic with
tethereal.
It seems like a huge (30,000) or so packets every few seconds of just
UDP traffic is being punted.
The system is a Sup720-3BXL.
What's the IOS version? As posted recently, I've seen FIB/TCAM
programming errors on some IOSes; try a "shut", "no shut" of the input
interfaces (if you can)
All kinds of things can cause CPU punts, but primarily you're looking
for MTU failures, ICMP redirects (packets coming in on an interface
which is also the outbound interface), glean (next-hop needs ARP) and
similar.
Obviously if you've somehow managed to fall back to CPU forwarding, but
that's unlikely from the sounds of it.
Bear in mind that certain kinds of traffic (e.g. RPF failures) are
"leaked" to the CPU so that it can see & count them; do you have any MLS
rate-limiters enabled ("sh mls rate-limit")
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