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Best practice analyser report shows: Receive-Side Scaling State

Posted on 2010-11-12
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Last Modified: 2012-06-21
Can anyone explain in lamens terms what this means? should i action this or just leave it?

Receive-Side Scaling State


Receive-Side Scaling State is set to enabled. To disable Receive-Side Scaling, click Start, and in the Search box type
"command." in the results, right-click Command Prompt, and then click Run as administrator. At the command prompt,
run the following command:
netsh int tcp set global rss=disabled
For more information, see:
Information about the TCP Chimney Offload, Receive Side Scaling, and Network Direct Memory Access features in
Windows Server 2008
http://go.microsoft.com/fwlink/?LinkId=189029
Mail flow to certain domains does not work when you run Exchange Server 2007 on a Windows Server 2008-based
computer
http://go.microsoft.com/fwlink/?LinkId=189028
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Question by:resolver1
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Accepted Solution

by:
Rob Williams earned 500 total points
ID: 34120620
There are some known issues with advanced NIC properties such as "large send offload", "Checksum offload", and "Receive-Side Scaling" which drastically affect performance of file share access if enabled and especially if you are running older drivers. Running the SBS Best Practices Analyzer will usually recommend disabling these. If new drivers are available they may make use of these features, otherwise they should be disabled.

http://blogs.technet.com/b/networking/archive/2008/11/14/the-effect-of-tcp-chimney-offload-on-viewing-network-traffic.aspx
http://blogs.dirteam.com/blogs/sanderberkouwer/archive/2008/05/15/backward-compatible-networking-with-server-core.aspx
http://support.microsoft.com/kb/951037
http://msmvps.com/blogs/thenakedmvp/archive/2010/02/23/rss-tcp-offloading-strikes-again-microsoft-should-kill-this-feature-for-the-masses.aspx
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by:resolver1
ID: 34135054
Thanks for your reply. How do i find out for sure if i should disable these features?  Ive taken some details from my computer that help in the solution.

Details of network card from system information:
HP NC373i Multifunction Gigabit Server Adapter
Driver      c:\windows\system32\drivers\bxnd60a.sys (5.2.14.0, 81.54 KB (83,496 bytes), 31/08/2010 14:55)

In the advanced properties of this network card (device manager) and I can see it has receive side scaling enabled.  Does this mean that this driver takes advantage of this feature and it should be enabled.  

Details of network card from system information:
HP NC110T PCIe Gigabit Server Adapter
Driver: c:\windows\system32\drivers\n1e6032e.sys (9.12.14.0, 301.63 KB (308,864 bytes), 10/09/2010 12:05)

I cant see a option for receive side scaling in the advanced propties of the network controller.  
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Author Comment

by:resolver1
ID: 34147036
I've disabled the Receive-Side Scaling State.  dont see it as a big issue if its disabled - i like the idea microsoft trying to implement.  Thanks for the info.
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