>> You have also to check/set GlobalMaxTcpWindowSize and
>> change Tcp1323Opts to 3.
 
Both these parameters are set as well.
 
GlobalMaxTcpWindowSize is same as TcpWindowSize. Tcp1323Opts is 3.
 
any more ideas please?
 
Thanks,
Sunil


René Berber <r.berber@computer.org> wrote:
Sunil wrote:

> I tried to set TcpWindowsSize in windows by changing the registry but
> the value used is still 64 kbytes. Anyone know if windows xp sp2
> discards the value in
> HKLM\SYSTEM\CurrentControlSet\Services\Tcpip\Parameters,*TcpWindowSize*
> **
>
> I have it set to 255500 but iperf still shows 64kb as default. Online
> tests confirm this value of rwin.
>
> I don't know why it doesn't use the value. I will appreciate some help.

You have also to check/set GlobalMaxTcpWindowSize and change Tcp1323Opts to 3.

Ref: http://rdweb.cns.vt.edu/public/notes/win2k-tcpip.htm
http://www.psc.edu/networking/projects/tcptune/#Win2k
--
René Berber



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