TcpWindowSize Global or Per Interface?

Is the TCP Windows size set globally for all interfaces? The Microsoft
Windows 2003 Performance Tuning Guidelines document says TcpWindowSize is
set at location:



\\HKLM\system\CurrentControlSet\Services\Tcpip\Par ameters\TcpWindowSize


This seems odd considering that TcpAckFrequency is set per interface, for
example inside of:

\\HKLM\system\CurrentControlSet\Services\Tcpip\Par ameters\Interfaces\{999...999}


--
Will




Will

Hi Will,

In Windows Server 2003, you can set for every network interface card a
different TcpWindowSize
The right place to do that is

HKLM/System/CCC/Services/Tcpip/Parameters/Interfaces/ --> there you got all
the NIC installed on your machine with they GUID. Select the right one and
then put the TcpWindowSize.

I think you would also need to specify a GlobalMaxTcpWindowSize in the
HKLM\system\CurrentControlSet\Services\Tcpip\Param eters\ to set a maximum
for the machine.

Kind regards

Arnaud LHEUREUX [MS]

"Will" <westes-(E-Mail Removed)> a écrit dans le message de
news:(E-Mail Removed) ...
> Is the TCP Windows size set globally for all interfaces? The Microsoft
> Windows 2003 Performance Tuning Guidelines document says TcpWindowSize is
> set at location:
>
>
>
> \\HKLM\system\CurrentControlSet\Services\Tcpip\Par ameters\TcpWindowSize
>
>
> This seems odd considering that TcpAckFrequency is set per interface, for
> example inside of:
>
> \\HKLM\system\CurrentControlSet\Services\Tcpip\Par ameters\Interfaces\{999...999}
>
>
> --
> Will
>
>

TcpWindowSize ( yes, it's global ) parameter used by MSFT tcpip.sys (
protocol driver ) opposite to ACK bit set to IP packet by miniport driver
( interface )
Arkady

"Will" <westes-(E-Mail Removed)> wrote in message
news:(E-Mail Removed) ...
> Is the TCP Windows size set globally for all interfaces? The Microsoft
> Windows 2003 Performance Tuning Guidelines document says TcpWindowSize is
> set at location:
>
>
>
> \\HKLM\system\CurrentControlSet\Services\Tcpip\Par ameters\TcpWindowSize
>
>
> This seems odd considering that TcpAckFrequency is set per interface, for
> example inside of:
>
> \\HKLM\system\CurrentControlSet\Services\Tcpip\Par ameters\Interfaces\{999...999}
>
>
> --
> Will
>
>