[c-nsp] Cisco 2811 performance issue - dual(new) isp

Reuben Farrelly reuben-cisco-nsp at reub.net
Thu Dec 22 17:24:57 EST 2011

The command:

router#show ip cef switching statistics feature

Will show you which feature is causing traffic to be punted to CPU.


On 23/12/2011 7:42 AM, Chuck Church wrote:
> You're on the right path.  The more important number is the packets in/out,
> as opposed to the characters.  Look at the ratio of packets in/out for
> processor vs. Route-cache for the two interfaces.  Fa0/1 is process
> switching about 80% of them inbound.  That's pretty bad.    The output looks
> better.  Compare that to VLAN 10, where in both directions, only about 10%
> are process switched.  The stats for the switchports are meaningless, so you
> can ignore those as the switch ASICs deal with those, until they hit the
> VLAN int.  Figure out what feature (or IOS bug??) is causing so much process
> switching, and I think it'll get better.

More information about the cisco-nsp mailing list