[192870] in North American Network Operators' Group
Re: 10G switch drops traffic for a split second
daemon@ATHENA.MIT.EDU (Mikael Abrahamsson)
Wed Nov 30 11:43:53 2016
X-Original-To: nanog@nanog.org
Date: Wed, 30 Nov 2016 17:43:49 +0100 (CET)
From: Mikael Abrahamsson <swmike@swm.pp.se>
To: TJ Trout <tj@pcguys.us>
In-Reply-To: <CAP5r2ctOm1v8axHrUqMz5jcov2gdgJ7VD3bE=a4MCMUe0A3Vbw@mail.gmail.com>
Cc: nanog@nanog.org
Errors-To: nanog-bounces@nanog.org
On Tue, 29 Nov 2016, TJ Trout wrote:
> Is it possible to over run the buffers of a 320gbps backplane switch
> with only 1.5gbps traffic? I think the switch is rated for 140m PPS and
> I'm only pushing 100k PPS
If your switch is the typical small-buffered-switch that has become more
and more common the past few years, then the entire switch might have
buffer to keep packets for 0.1ms or less. So if someone says "flow control
off" for 0.1ms, depending on the implementation, you might then start
seeing packet drops on all ports until that device turns flow control
back on.
--
Mikael Abrahamsson email: swmike@swm.pp.se
