Re: Trident3 vs Jericho2

[Tom Beecher <beecher () beecher cc>]

> If you have all the same port speed, small buffers are fine. If you have
> 100G and 1G ports, you'll need big buffers wherever the transition to the
> smaller port speed is located.


While the larger buffer there you are likely to be severely impacting
application throughput.

On Fri, Apr 9, 2021 at 9:05 AM Mike Hammett <nanog () ics-il net> wrote:

> What I've observed is that it's better to have a big buffer device when
> you're mixing port speeds. The more dramatic the port speed differences
> (and the more of them), the more buffer you need.
>
> If you have all the same port speed, small buffers are fine. If you have
> 100G and 1G ports, you'll need big buffers wherever the transition to the
> smaller port speed is located.
>
>
>
> -----
> Mike Hammett
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> ------------------------------
> *From: *"Dmitry Sherman" <dmitry () interhost net>
> *To: *nanog () nanog org
> *Sent: *Friday, April 9, 2021 7:57:05 AM
> *Subject: *Trident3 vs Jericho2
>
> Once again, which is better shared buffer featurerich or fat buffer
> switches?
> When its better to put big buffer switch? When its better to drop and
> retransmit instead of queueing?
>
> Thanks.
> Dmitry