Re: tcp/ip registry tweak not working

Jack I finally found & solved the problem. After sifting through number of
microsoft solution documents. Which none of the documents had a solution for
this particular problem. I decided to use netsh again, since resetting the
tcp stack didnt work might as well try and reset the winsock...and it
worked/fixed it.

Here's what to do if you or anyone else reading this thread encounters this
problem.

Problem:
You have entered these two registry values TcpWindowSize (entering a size
larger then 64240) & Tcp1323Opts (set to 1) in the registry key
HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\Tcpip\Parameters. Then
when you verify the Tcp Receive Window by going to a website like
http://www.speedguide.net/analyzer.php to verify the tcp receive window value
& the value still shows as the default 64240. Even tho you have entered a
different value then the default.

Solution:

1) open command prompt - start>run>cmd

2) from the command prompt enter the netsh utility by simply typing netsh

3) Type winsock this will put you at the level of netsh winsock>

4) type reset

5) reboot computer

6) This will fix the problem of the Tcp Receive window size always showing
incorrect value even tho you have entered a custom value in the registry.

7) To verify your tcp receive window size, one site to visit is
http://www.speedguide.net/analyzer.php



"Jack (MVP-Networking)." wrote:

Hi
I do not know how you tweak it and why you are choosing this value.
If you are using WinXP please look at this page.
Optimizing the TCP/IP Stack - http://www.ezlan.net/Internet_Speed.html
Jack (MVP-Networking).

"Marbles" <Marbles@xxxxxxxxxxxxxxxxxxxxxxxxx> wrote in message
news:7F6250FA-C90E-4B94-A83D-EEFC1E7F3629@xxxxxxxxxxxxxxxx
Hello

I have used these 2 registry tweaks to improve the tcp throughput ,
Tcp1323Opts & TcpWindowSize. Both of them were working for a while until
recently.

Now they dont work. Its defaulted back to 64240 for the receive window.

Changing the tcpwindows amount to any size will not work I have also tried
swaping these 2 entries from \Tcpip\Parameters registry key to the
\Interfaces\######\ registry path. None seems to work. I have also tried
resetting tcp/ip by using the netsh console and resetting tcp/ip to its
default setting ...still not functioning

Anyone know what could be causing it not to function correctly & how does
one fix this ?

any & all help would be greatly appreciated


.

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