[c-nsp] 6500 netflow export and the switch cpu

[Jon Lewis]

On Thu, 11 Sep 2008, Jon Lewis wrote:

> On Thu, 11 Sep 2008, Phil Mayers wrote:
>
>> What do the following say:
>> 
>> sh mls netflow table-contention detailed
>
> Earl in Module 5
> Detailed Netflow CAM (TCAM and ICAM) Utilization
> ================================================
> TCAM Utilization             :   100%
> ICAM Utilization             :   7%
> Netflow TCAM count           :   262026
> Netflow ICAM count           :   10
> Netflow Creation Failures    :   456680
> Netflow CAM aliases          :   0
>
> I guess I need to get more aggressive on the flow aging.  I've been using
> mls aging fast time 8 threshold 3
> mls aging long 480
> mls aging normal 32

It looks like the fix was to enable flow-sampling.

mls sampling time-based 64

has our cpu usage back down to about nothing and tcam usage down around 
50%.

----------------------------------------------------------------------
  Jon Lewis                   |  I route
  Senior Network Engineer     |  therefore you are
  Atlantic Net                |
_________ http://www.lewis.org/~jlewis/pgp for PGP public key_________