Scalable Networking Pack is Installed
Topic Last Modified: 2010-02-24
The Microsoft Exchange Server Analyzer Tool performs the following operations:
It determines whether the computer is running Microsoft Windows Server 2003 Service Pack 1 (SP1).
It parses the following registry path to determine whether the EnableTCPChimney, EnableTCPA, or EnableRSS registry keys exist and are set to a value other than 0 on an Exchange Server that is running Windows Server 2003.
It examines the version of the Tcpip.sys file in the %WINDIR%\System32\drivers directory to determine whether Tcpip.sys is between version 5.2.3790.2670 and version 5.2.3790.4331.
The presence of the EnableTCPChimney, EnableTCPA, or EnableRSS registry keys indicates that the Microsoft Windows Server 2003 Scalable Networking Pack is installed on the server. The Scalable Networking Pack includes support for TCP Chimney Offload, Receive-side Scaling, and NetDMA features.
A value other than 0 for any of the EnableTCPChimney, EnableTCPA, or EnableRSS registry keys means that the specific feature is enabled.
If the Exchange Server Analyzer determines that the following conditions are both true, the Exchange Server Analyzer displays a warning:
The Scalable Networking Pack is installed on an Exchange Server that is running Windows Server 2003, and any one of the Scalable Networking Pack features is enabled.
The Tcpip.sys file version is not between versions 5.2.3790.2670 and 5.2.3790.4331.
As a best practice, we recommend that you verify that the latest Network Interface Card (NIC), storport.sys, and Storage Area Network (SAN) drivers have been installed on Exchange servers that have the Microsoft Windows Server 2003 Scalable Networking Pack installed to avoid possible issues with Exchange Server performance.
For more information about the Microsoft Windows Server 2003 Scalable Networking Pack and possible performance issues it might have with Exchange Server, see the Microsoft Exchange Team Blog entry, "Windows 2003 Scalable Networking pack and its possible effects on Exchange" (http://go.microsoft.com/fwlink/?LinkId=108158).
For more information about a Scalable Networking Pack update that is available for Windows Server 2003 Service Pack 2 (SP2), see "A Scalable Networking Pack (SNP) hotfix rollup package is available for Windows Server 2003" (http://go.microsoft.com/fwlink/?linkid=3052&kbid=950224).