Article ID: 285663
Article Last Modified on 1/29/2007
APPLIES TO
- Microsoft Windows 2000 Service Pack 1
- Microsoft Windows 2000 Service Pack 2
- Microsoft Windows 2000 Advanced Server
- Microsoft Windows 2000 Advanced Server
- Microsoft Windows 2000 Service Pack 1
- Microsoft Windows 2000 Service Pack 2
- Microsoft Windows NT 4.0 Service Pack 6a
- Microsoft Windows NT 4.0 Service Pack 6a
- Microsoft Windows NT Workstation 4.0 Developer Edition
This article was previously published under Q285663
SYMPTOMS
When a client is configured with two gateways and one of the gateways is not working, existing Transmission Control Protocol/Internet Protocol (TCP/IP) connectivity may break if the client receives a reset from a remote server. The reset may occur when the client tries to connect to a remote server port that is not listening.
CAUSE
This problem occurs because of the way that TCP processes a reset during connection establishment. SYN is retried three times, even if RST is received. On the second retry, TCP tries to check for an alternate route. If the number of connections that are not working is greater than 25 percent of the connections, TCP tries to switch all of the connections to a different route. Because the second gateway is not working, existing connections are broken.
RESOLUTION
Windows 2000
To resolve this problem, obtain the latest service pack for Windows 2000. For additional information, click the following article number to view the article in the Microsoft Knowledge Base:
260910 How to Obtain the Latest Windows 2000 Service Pack
The English version of this fix should have the following file attributes or later:
Date Time Version Size File name
------------------------------------------------------------
5/29/2001 07:54a 5.0.2195.3649 118,800 Afd.sys
5/31/2001 03:31p 5.0.2195.3649 104,720 Msafd.dll
5/30/2001 02:28p 5.0.2195.3650 312,240 Tcpip.sys
5/29/2001 07:53a 5.0.2195.3649 16,208 Tdi.sys
5/31/2001 03:32p 5.0.2195.3649 17,680 Wshtcpip.dll
Windows NT 4.0
A supported hotfix is now available from Microsoft, but it is only intended to correct the problem that this article describes. Apply it only to systems that are experiencing this specific problem.
To resolve this problem, contact Microsoft Product Support Services to obtain the hotfix. For a complete list of Microsoft Product Support Services telephone numbers and information about support costs, visit the following Microsoft Web site:
Note In special cases, charges that are ordinarily incurred for support calls may be canceled if a Microsoft Support Professional determines that a specific update will resolve your problem. The usual support costs will apply to additional support questions and issues that do not qualify for the specific update in question.
The English version of this fix should have the following file attributes or later:
Date Time Version Size File name Platform
------------------------------------------------------------------
01/07/2000 04:51p 4.0.1381.7036 66,480 Afd.sys Intel
03/20/2001 07:01p 4.0.1381.7045 47,888 Msafd.dll Intel
03/20/2001 06:43p 4.0.1381.7095 174,736 Tcpip.sys Intel
02/12/1999 03:01p 4.0.1381.164 9,712 Tdi.sys Intel
03/20/2001 07:01p 4.0.1381.7045 18,704 Wshtcpip.dll Intel
03/01/2001 05:01p 4.0.1381.7092 115,408 Afd.sys Alpha
03/20/2001 07:01p 4.0.1381.7052 79,120 Msafd.dll Alpha
03/20/2001 06:39p 4.0.1381.7095 308,784 Tcpip.sys Alpha
03/01/2001 05:01p 4.0.1381.7092 14,224 Tdi.sys Alpha
03/20/2001 07:01p 4.0.1381.7052 28,432 Wshtcpip.dll Alpha
NOTE: Because of file dependencies, this fix requires Microsoft Windows NT 4.0 Service Pack 6a.
STATUS
Microsoft has confirmed that this is a problem in the Microsoft products that are listed at the beginning of this article. This problem was first corrected in Windows 2000 Service Pack 3.
MORE INFORMATION
For additional information about how to obtain a hotfix for Windows 2000 Datacenter Server, click the article number below to view the article in the Microsoft Knowledge Base:
265173 The Datacenter Program and Windows 2000 Datacenter Server Product
For additional information about how to install multiple hotfixes with only one reboot, click the article number below to view the article in the Microsoft Knowledge Base:
296861 Use QChain.exe to Install Multiple Hotfixes with One Reboot
For additional information about how to install Windows 2000 and Windows 2000 hotfixes at the same time, click the article number below to view the article in the Microsoft Knowledge Base:
249149 Installing Microsoft Windows 2000 and Windows 2000 Hotfixes
Additional query words: ing TCPIP
Keywords: kbbug kbfix kbperformance kbwin2000presp3fix kbqfe kbwin2000sp3fix kbnetwork kbhotfixserver KB285663
