[c-nsp] Sup720 CoPP, limits on CPU performance

[Rodney Dunn]

I seem to recall that also but I thought it was a bug not a hw limitation.

Rodney



On 3/25/10 3:51 AM, Gert Doering wrote:
> Hi,
>
> On Wed, Mar 24, 2010 at 10:49:19PM -0400, Rodney Dunn wrote:
>> Explain the glean to me again?
>
> Someone "up-thread" reported about a problem with early(?) 3Bs that would
> lead to a surprising interaction of mls rate limiters for glean traffic
> and output ACLs of the input interface.  We haven't seen this, but I find
> this scary.
>
> Otherwise, using mls rate-limiting for glean and CoPP for the rest should
> work out fine.
>
>> Sorry..I'm overloaded but trying to catch up on the thread.
>>
>> We, I need to go back and check, implemented periodic punts at one point
>> that would match the glean and all subsequent packets were dropped in
>> hw/under interrupt..it wasn't a 1:1 punt.
>
> The issue wasn't "glean traffic overloading the CPU" but "certain
> combinations of CoPP and mls rate-limit eating the wrong packets".
>
> gert
>