Server Products
Server Products
Slow Network Performance Under Windows Server 2008*

Symptom(s):

Slow network performance under Windows Server 2008*.

Cause:

Windows Server 2008* uses TCP window scaling to maximize network performance. Older routers, firewalls, and operating systems not compatible with this feature might see slow data transfer or loss of connectivity.

If the issue only happens with Hyper-V, see Low network performance observed with Microsoft Windows 2008 R2*

Solution:

  1. Make sure your router, firewall, and client operating system support TCP window scaling.
  2. Check with the network device manufacturer for firmware updates that support TCP window scaling.
  3. If the issue continues, disable TCP window scaling on Windows Server 2008* by running this command:
    netsh interface tcp set global autotuninglevel=disabled
Related topics
Microsoft knowledge base: A Web site sends data very slowly
Microsoft knowledge base: When you copy large files
Microsoft knowledge base: It takes much longer than expected to download an e-mail message

Operating System:

Windows Server 2008 *

This applies to:

Intel® Server Board S3200SH
Intel® Server Board S5000PAL
Intel® Server Board S5000PSL
Intel® Server Board S5000VCL
Intel® Server Board S5000VSA
Intel® Server Board S5000XSL
Intel® Server Board S5400SF
Intel® Server Board S5500BC
Intel® Server Board S5500HCV
Intel® Server Board S5500HV
Intel® Server Board S5500WB
Intel® Server Board S5520HC
Intel® Server Board S5520UR
Intel® Server System SC5400RA
Intel® Server System SR1530CL
Intel® Server System SR1530HCL
Intel® Server System SR1530HCLS
Intel® Server System SR1530SH
Intel® Server System SR1560SF
Intel® Server System SR1600UR
Intel® Server System SR1625UR
Intel® Server System SR1630BC
Intel® Server System SR1680MV
Intel® Server System SR2520SA
Intel® Server System SR2600UR Family
Intel® Server System SR2625UR Family
Intel® Workstation Board S5000XVN
Intel® Workstation Board S5520SC

Solution ID: CS-030717
Last Modified: 15-Oct-2014
Date Created: 28-Jul-2009
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