TCP/IP Causes Time Wait States to Exceed Four Minutes

 Last reviewed: December 15, 1997
Article ID: Q169274
The information in this article applies to:
  • Microsoft Windows NT Server version 4.0
  • Microsoft Windows NT Server Enterprise Edition version 4.0

SYMPTOMS

There is a small time window in Afd.sys (the Microsoft Winsock2 service provider for TDI transport) where it does not indicate data received immediately after a connection is accepted. This window should affect only applications that use AcceptEx with buffer space for receiving data after a connection is accepted.

CAUSE

In TCP/IP, timewait state queue management has a problem that causes time wait states to exceed four minutes under stress.

RESOLUTION

To resolve this problem, obtain the following fix or wait for the next Windows NT service pack.

This fix should have the following time stamp: 

   12/11/97  12:16p                65,488 Afd.sys   (Intel)
   12/01/97  06:15p               147,632 Tcpip.sys (Intel)

   11/21/97  06:41p               112,304 Afd.sys   (Alpha)
   11/26/97  04:13p               263,216 Tcpip.sys (Alpha)
This hotfix has been posted to the following Internet location: 

   ftp://ftp.microsoft.com/bussys/winnt/winnt-public/fixes/usa/NT40/
   hotfixes-postSP3/iis4-fix/
NOTE: The above link is one path; it has been wrapped for readability.

STATUS

Microsoft has confirmed this to be a problem in Windows NT version 4.0. A supported fix is now available, but has not been fully regression-tested and should be applied only to systems experiencing this specific problem. Unless you are severely impacted by this specific problem, Microsoft recommends that you wait for the next Service Pack that contains this fix. Contact Microsoft Technical Support for more information.

Additional query words: prodnt 4.00
Keywords : kbbug4.00 kbfix4.00 NTSrv nttcp
Version : WinNT:4.0
Platform : winnt
Issue type : kbbug
Solution Type : kbpatch

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Last reviewed: December 15, 1997
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