How To Tweak Vista TCP Settings

[oldphart]

Hi all, as you know you can’t use TCPOptimizer with Vista, but you can tweak Vista TCP manually. Did a search on the forum nothing turned up. So follow these steps to tweak your Vista TCP settings -
Remember : To tweak any TCP settings in Vista you need to run cmd as Administrator.
Programs > Accessories > Command Prompt >
Right Click on Command Prompt > Select "Run as administrator

To check status :- netsh int tcp show global
(copy and paste) into CMD hit return

C:\Windows\system32>netsh int tcp show global
Quering active state...

TCP GLOBAL PARAMETERS NORMAL SETTINGS
-------------------------------------

RECEIVE-SIDE SCALING STATE : ENABLED
CHIMMY OFFLOAD STATE : DISABLED
RECEIVE WINDOW AUTO-TUNING LEVEL : HIGHLYRESTRICTED
ADD-ON CONGESTION CONTROL PROVIDER : NONE
ECN CAPABILITY : DISABLED
RFC 1323 TIMESTAMPS : DISABLED


A.TCP GLOBAL PARAMETERS TWEAKED
-----------------------------

RECEIVE-SIDE SCALING STATE : ENABLED
CHIMMY OFFLOAD STATE : ENABLED
RECEIVE WINDOW AUTO-TUNING LEVEL : NORMAL
ADD-ON CONGESTION CONTROL PROVIDER : CTCP
ECN CAPABILITY : ENABLED
RFC 1323 TIMESTAMPS : DISABLE

Just copy and paste each command into CMD hit return -

C:\Windows\system32>netsh int tcp set global rss=enabled
OK.

RECEIVE-SIDE SCALING STATE-

netsh int tcp set global rss=enabled

netsh int tcp set global rss=disabled

CHIMMY OFFLOAD STATE-

netsh int tcp set global chimney=enabled

netsh int tcp set global chimney=disabled

RECEIVE WINDOW AUTO-TUNING LEVEL-

netsh int tcp set global autotuninglevel=normal

netsh int tcp set global autotuninglevel=highlyrestricted

ADD-ON CONGESTION CONTROL PROVIDER-

netsh int tcp set global congestionprovider=ctcp

netsh int tcp set global congestionprovider=none

ECN CAPABILITY- ( PLEASE NOTE IF YOU HAVE TROUBLE CONTACTING A SERVER I.E GAMES SERVER)
(DISABLE - ECN [ netsh int tcp set global ecncapability=default ])
netsh int tcp set global ecncapability=disabled

netsh int tcp set global ecncapability=enabled

netsh int tcp set global ecncapability=default

ecncapability parameters are:

disabled: Disable ECN Capability.
enabled: Enable ECN Capability.
default: Restore ECN Capability state to the system default

RFC 1323 TIMESTAMPS- : DISABLED

B..TCP GLOBAL PARAMETERS tweaked

To check status :- netsh int tcp show global

RECEIVE-SIDE SCALING STATE : ENABLED
CHIMMY OFFLOAD STATE : ENABLED
RECEIVE WINDOW AUTO-TUNING LEVEL : DISABLED
ADD-ON CONGESTION CONTROL PROVIDER : CTCP
ECN CAPABILITY : ENABLED
RFC 1323 TIMESTAMPS : DISABLED

A. netsh int tcp set global autotuninglevel=disable
(disable's autotuning)

B. netsh interface tcp set global autotuninglevel=normal
(restore the setting back to the default)



Hope this helps, might be worth adding to Sky Broadband Tutorial section as a sticky if people agree.

[silverfox]

or go here
SG Tweaking programs, tools and links - SpeedGuide.net Broadband Community
and right click the vista command and save to your desktop and run