Perhaps you should just turn off auto-tuning?
http://www.speedguide.net/read_articles.php?id=2574
Regards,
Frank
From: wireshark-users-bounces@xxxxxxxxxxxxx
[mailto:wireshark-users-bounces@xxxxxxxxxxxxx] On Behalf Of Aaron Allen
Sent: Thursday, September 04, 2008 9:13 AM
To: 'wireshark-users@xxxxxxxxxxxxx'
Subject: [Wireshark-users] TCP Window Sizes
This is primarily a TCP related question, so if there is a
more appropriate forum for this question, please point me in the right
direction.
I am trying to identify the source of a slowdown for an
upload to Amazon S3 from a Windows 2008 server. Packet captures seem to
indicate the problem is with the TCP window size. When I manually
increase the TCP window size on another machine, I am easily able to get
maximum bandwidth utilization. But, for some reason, this 2008 machine
won’t increase the window size beyond 64K.
I can’t increase the TCP Window size on the 2008
machine because of the new and “improved” auto tcp tuning. Is
there something else I should be looking for that could be causing the window
size to not be scaled any higher?