Networking Connectivity
Network Connectivity
Slow or timed-out network connections under Windows Vista*

Symptom(s):

A number of symptoms are caused by the same issue. Symptoms might include any of the following.

  • Network connections are slow or time out with error messages.
  • Messages might include text such as "The connection to the server was interrupted" "Page cannot be displayed."
  • Downloading mail from an Internet Service Provider (ISP) takes longer than expected.

Cause:
By default, Windows Vista uses TCP autotuning to control TCP Receive Window size. If your router or firewall does not support TCP Window Scale option then slow or dropped connections might occur.

Solution:

There is no Intel network connection driver or software setting to control the TCP Receive Scale option. This option is controlled by the network stack of Windows Vista*. To disable the the TCP Receive Window Autotuning level in Windows Vista, follow these steps:

  1. Open a command prompt window. (Click Start, click All Programs, click Accessories, and click Command Prompt.)
  2. Type the following command and press Enter:
         netsh interface tcp set global autotuninglevel=disabled

If you upgrade your firewall or router and want to set this feature to its default value, follow these steps:

  1. Open a command prompt window. (Click Start, click All Programs, click Accessories, and click Command Prompt.)
  2. Type the following command and press Enter:
         netsh interface tcp set global autotuninglevel=normal

Related Documents:
TCP Receive Window Auto-Tuning Explained*
Slow Internet Connections or Error message: "Page cannot be displayed"*
Slow E-Mail Downloads or Error Message in Outlook*
Network connectivity may fail when you try to use Windows Vista behind a firewall device*

Operating System:

Windows Vista 64*, Windows Vista Starter, 32-bit version*, Windows Vista Home Basic, 32-bit version*, Windows Vista Home Premium, 32-bit version*, Windows Vista Business, 32-bit version*, Windows Vista Enterprise, 32-bit version*, Windows Vista Ultimate, 32-bit version*, Windows Vista Home Basic, 64-bit version*, Windows Vista Home Premium, 64-bit version*, Windows Vista Business, 64-bit version*, Windows Vista Enterprise, 64-bit version*, Windows Vista Ultimate, 64-bit version*, Windows Vista *, Windows Vista 32*

This applies to:

Intel® PRO/100 M Desktop Adapter
Intel® PRO/100 S Desktop Adapter
Intel® PRO/100 S Dual Port Server Adapter
Intel® PRO/100 S Server Adapter
Intel® PRO/100 VE Desktop Adapter
Intel® PRO/100 VE Network Connection
Intel® PRO/100 VM Network Connection
Intel® PRO/100+ Adapter
Intel® PRO/100+ Management Adapter
Intel® PRO/100+ Server Adapter
Intel® PRO/1000 GT Desktop Adapter
Intel® PRO/1000 MF Dual Port Server Adapter
Intel® PRO/1000 MF Server Adapter
Intel® PRO/1000 MF Server Adapter (LX)
Intel® PRO/1000 MT Desktop Adapter
Intel® PRO/1000 MT Dual Port Server Adapter
Intel® PRO/1000 MT Server Adapter
Intel® PRO/1000 PF Dual Port Server Adapter
Intel® PRO/1000 PF Server Adapter
Intel® PRO/1000 PT Desktop Adapter
Intel® PRO/1000 PT Dual Port Server Adapter
Intel® PRO/1000 PT Server Adapter
Intel® PRO/1000 T Desktop Adapter
Intel® PRO/100B Adapter

Solution ID: CS-028868
Last Modified: 23-Jun-2014
Date Created: 24-Feb-2008
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