[192844] in North American Network Operators' Group
Re: 10G switch drops traffic for a split second
daemon@ATHENA.MIT.EDU (Chuck Anderson)
Tue Nov 29 11:33:20 2016
X-Original-To: nanog@nanog.org
Date: Tue, 29 Nov 2016 11:32:53 -0500
From: Chuck Anderson <cra@WPI.EDU>
To: TJ Trout <tj@pcguys.us>
Mail-Followup-To: TJ Trout <tj@pcguys.us>, nanog@nanog.org
In-Reply-To: <CAP5r2csgw-1AE1O5kgYtp57V_pcMqa=otGj+Bn-o+j1h0VYoBA@mail.gmail.com>
Cc: nanog@nanog.org
Errors-To: nanog-bounces@nanog.org
Without more detail, I'm grasping at straws here, but see this recent
thread about QoS and microbursts on the juniper-nsp list:
https://puck.nether.net/pipermail/juniper-nsp/2016-November/033692.html
Do you have ports with different speeds connected?
Another idea: Are you using Spanning Tree Protocol and seeing lots of
TCNs?
On Tue, Nov 29, 2016 at 01:06:00AM -0800, TJ Trout wrote:
> I recently upgraded my core network from 1G to 10G and after the upgrade I
> have noticed that my 10G switch during peak traffic (1500mbps, 100,000pps)
> seems to be dropping traffic for a split second across all ports and all
> vlans. I immediately replaced the switch with a different brand/model and
> the problem persists.
>
> Sometimes traffic drops to zero, others it drops to 50%, problem is very
> random but seems to occur with much more frequency during high PPS (pushing
> high traffic / iperf does not induce problem)
>
> Could this be MTU? I've tried flow control, hard code duplex, stp on/off etc
>
> I'm at a loss any ideas?
>
> TJ Trout
> Volt Broadband
