Re: changing default window size win2k

To: iperf-users --at-- dast.nlanr.net
Subject: Re: changing default window size win2k
From: Kevin Gibbs <kgibbs --at-- ncsa.uiuc.edu>
Date: Wed, 17 Dec 2003 13:19:22 -0600 (CST)
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In-reply-to: <NDBBJFMDGLBKHHKKKBEDOEHHOAAA.rriley --at-- ayayai.com>
Reply-to: iperf-users --at-- dast.nlanr.net
Sender: owner-iperf-users --at-- dast.nlanr.net

Windows does not let application level changes to the TCP algorithm 
parameters. As such the window size that iperf reports is simply a buffer 
size and has nothing to do what Windows uses for window sizes. Performance 
can be gained by setting this buffer larger from the commandline, but it 
is not the TCP window size that you are changing. Microsoft is pretty 
explicit about this in their docs.

Kevin

On Tue, 16 Dec 2003, Rolando Riley wrote:

> Hi Guys:
> 
>       I have been trying to adjust the default tcp window size and I
> although i have followed all the instructions on the followint URL:
> 
>         http://rdweb.cns.vt.edu/public/notes/win2k-tcpip.htm
> 
> 
>      When I run iperf -s  ...... It still shows  8 Kilobits default.
> 
> 
>        Have anybody experienced this same issue on WIN 2000
> 
> 
> best regards,
> 
> 
> 
> R. Riley
> 
> 
>

Follow-Ups:
- window sizes and buffer sizes (Re: changing default window sizewin2k)
  - From: Marc Herbert

References:
- changing default window size win2k
  - From: "Rolando Riley"

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