nanog mailing list archives

Re: 10G switch drops traffic for a split second


From: Michael Loftis <mloftis () wgops com>
Date: Tue, 29 Nov 2016 15:16:17 -0800

Yeah you also have to look for not so obvious things like MAC Pause
frames sent/received...QoS counters, all sorts of VERY platform
specific stuff.  Right royal pain, especially since some do not expose
these statistics at all.

On Tue, Nov 29, 2016 at 3:10 PM, Peter Beckman <beckman () angryox com> wrote:

On Tue, 29 Nov 2016, TJ Trout wrote:

I plan on disabling FC on everything tonight, I've done that before but I
want to be sure.

Anything that can be done about the 2 x 1G peers trunking to the 10G
router
transition that can be fixed? should I be rate limiting the vlan for the
peers at 1G so the 10G router isn't trying to send more than 1G?


 This thread reminded me of a blog post that struck me as useful 5 years
 ago, and again today. Measuring throughput, when dealing with buffers and
 troubleshooting errors and packet loss, must be done at a sub-one-second
 sampling rate.

 http://blog.serverfault.com/2011/06/27/per-second-measurements-dont-cut-it/

Beckman
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Peter Beckman                                                  Internet Guy
beckman () angryox com                                 http://www.angryox.com/
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