[149083] in North American Network Operators' Group
Re: pontification bloat (was 10GE TOR port buffers (was Re: 10G
daemon@ATHENA.MIT.EDU (Leo Bicknell)
Fri Jan 27 20:23:15 2012
Date: Fri, 27 Jan 2012 17:22:49 -0800
From: Leo Bicknell <bicknell@ufp.org>
To: "North American Network Operators' Group" <nanog@nanog.org>
Mail-Followup-To: North American Network Operators' Group <nanog@nanog.org>
In-Reply-To: <m2ty3g7i0j.wl%randy@psg.com>
Errors-To: nanog-bounces+nanog.discuss=bloom-picayune.mit.edu@nanog.org
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In a message written on Sat, Jan 28, 2012 at 10:06:20AM +0900, Randy Bush w=
rote:
> for those who say bufferbloat is a problem, do you have wred enabled on
> backbone or customer links?
For *most backbone networks* it is a no-op on the backbone. To be
more precise, if the backbone is at least 10x, and preferably more
like 50x faster than the largest single TCP flow from any customer
it will be nearly impossible to measure the performance difference
between a short FIFO queue and a WRED queue.
To the customer, absolutely, whenever possible, which generally
means when the hardware supports. Ideally with the queue length
tuned to match the link speed of the customer port. The slower speed
the customer port the more critical the tuning.
--=20
Leo Bicknell - bicknell@ufp.org - CCIE 3440
PGP keys at http://www.ufp.org/~bicknell/
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