[c-nsp] ASIC to switch port mapping

[Chris Evans]

4948 is a good choice.
> Any recommendations on a switch with larger buffers? I would like to
> stick with the 1U form factor.
>
> Also, are you saying that the microbursts cause the switch to exceed 1Gb
> port speed which causes the drops? Cisco claims that the
> WS-C3560E-24TD-E switch has a 128-Gbps wire rate non-blocking switching
> fabric capacity. I may be oversimplifying this, but to me, Cisco's
> claim implies that I should be able to run every port on this switch
> simultaneously at a full 1Gb in both directions.
>
> Thanks.
>
> --Vincent
>
> -----Original Message-----
> From: cisco-nsp-bounces at puck.nether.net
> [mailto:cisco-nsp-bounces at puck.nether.net] On Behalf Of Nick Hilliard
> Sent: Friday, September 10, 2010 4:11 PM
> To: cisco-nsp at puck.nether.net
> Subject: Re: [c-nsp] ASIC to switch port mapping
>
> On 10/09/2010 18:40, Vincent Aniello wrote:
>> Unless there is only a single ASIC in a 3560E switch I do not believe
>> this command returns the ASICs associated with each port. Here is the
>
>> output on my switch:
>
> oh, 3650. hmmm.
>
> Unfortunately, these switches have very small buffers indeed. If you
> microburst above what their buffers can handle, then yes - you will drop
> packets.
>
> I'd suggest that you check your outbound port usage. If there are any
> ports which are consistently or inconsistently high, or if you're seeing
> any ports with buffer drops, that you upgrade those connections.
> Alternatively, get a switch with larger per-port buffers.
>
> Nick
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