[c-nsp] nexus 7K COPP ARP traffic?

[Ryan Hughes]

Immediate recommendation to move to 5.2.3a or 5.2.4 - lots of catastrophic
fun to be had on 5.2.1 / 5.2.2 ... Contact your account team for more
details but I'm pretty sure one of the cases was shared on list a few
months back.

Ryan

On Mon, Mar 26, 2012 at 11:54 AM, Jeffrey G. Fitzwater
<jfitz at princeton.edu>wrote:

>
> I am trying to understand if ALL ARP (requests ) packets that a nexus 7K
> sees, need to be punted to the CPU and therefor managed by COPP policies /
> rate-limits?
>
> Over the weekend we had a data loop that cooked the CPU and we are trying
> to understand what packets that were control plane processed, caused the
> CPU load.
>
> We currently have a Nexus 7k running 5.2.1, that only has L2 interfaces,
> other than the management VRF port.   I would think that the CPU would
> never have to process any ARP requests for non-management traffic since it
> does not have any L3 interfaces.
>
>
> My understanding is that other sites have had similar issues and changing
> the COPP profile stopped  the CPU form being saturated during this kind of
> event.
>
> The COPP profile can be ( lenient, moderate, strict ).
>
>
> Thanks in advance for any info on this issue.
>
>
>
> Jeff Fitzwater
> OIT Netwrok Systems
> Princeton University
>
>
>
>
> _______________________________________________
> cisco-nsp mailing list  cisco-nsp at puck.nether.net
> https://puck.nether.net/mailman/listinfo/cisco-nsp
> archive at http://puck.nether.net/pipermail/cisco-nsp/
>