Posted by: kurtsh | March 9, 2008

HOWTO: Disable the Scalable Networking Pack in Windows Server 2003 Service Pack 2

We have an update coming at the beginning of March to disable the Scalable Networking Pack features on Windows Server 2003 SP2 machines.

The Scalable Networking Pack can cause issues with machines without the appropriate hardware necessary and thus cannot take advantage of it’s capabilities.  In order to avoid support related issues with the SNP on the vast majority of systems where customers won’t be able to specifically take advantage of the SNP, we will have an update available publicly which modifies the registry to effectively disable these features.

Again, please note that this hotfix does nothing more than set the following registry keys to ‘disabled’ and REQUIRES a reboot of the server in which this hotfix has been applied to.  Here is what is being added to the registry.

  • HKLM,"SYSTEMCurrentControlSetServicesTcpipParameters","EnableTCPChimney",0
  • HKLM,"SYSTEMCurrentControlSetServicesTcpipParameters","EnableRSS",0
  • HKLM,"SYSTEMCurrentControlSetServicesTcpipParameters","EnableTCPA",0

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