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per-route TCP windows?

To: netdev@xxxxxxxxxxx
Subject: per-route TCP windows?
From: Mark Hahn <hahn@xxxxxxxxxxxxxxxxxxx>
Date: Thu, 14 Jul 2005 21:09:57 -0400 (EDT)
Sender: netdev-bounce@xxxxxxxxxxx
I was recently fiddling with TCP performance on long-fat links,
and noticed that iproute2 seems to allow one to set a per-route window.

is this implemented in the stack?  I gave it one try and it didn't
seem to work, but I admit I haven't delved into the code yet.

we'd like to tune for some 10Gb, 3-6 ms links, mainly to move large files
between our sites.  this is not CERN-scale stuff, but being able to configure
large windows on particular routes sounds terribly convenient...

thanks, mark hahn

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