The DNS Client service does not revert to using the first server in the list

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Article ID: 286834 - View products that this article applies to.
This article was previously published under Q286834
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SYMPTOMS

The Windows 2000 Domain Name System (DNS) Client service (Dnscache) follows a certain algorithm when it decides the order in which to use the DNS servers that are configured in the TCP/IP properties. If the DNS server list is reprioritized, the Windows 2000 DNS Client service may not reset the server priority at periodic intervals.

RESOLUTION

To resolve this problem, obtain the latest service pack for Windows 2000. For more 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
   -----------------------------------------------------
   26-Sep-2001  10:09  5.0.2195.43  94,992  Dnsrslvr.dll
				

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

Important This section, method, or task contains steps that tell you how to modify the registry. However, serious problems might occur if you modify the registry incorrectly. Therefore, make sure that you follow these steps carefully. For added protection, back up the registry before you modify it. Then, you can restore the registry if a problem occurs. For more information about how to back up and restore the registry, click the following article number to view the article in the Microsoft Knowledge Base:
322756 How to back up and restore the registry in Windows
After you apply this hotfix, the server priorities are reset every 15 minutes by default. You can configure this behavior configured by adding the following registry value:

Key: HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\Dnscache\Parameters

Value: ServerPriorityTimeLimit
Data type: REG_DWORD
Range: 0x0 to 0xFFFFFFFF seconds

If you set this value to 0 (zero), the server priorities will be reset before the Client service decides which DNS server to use. Therefore, the DNS server that is configured first will be attempted first on each query. To make the changes to this value effective, you must restart Windows 2000. For more information about how to install Windows 2000 and Windows 2000 hotfixes at the same time, click the following article number to view the article in the Microsoft Knowledge Base:
249149 Installing Microsoft Windows 2000 and Windows 2000 hotfixes

Properties

Article ID: 286834 - Last Review: October 12, 2007 - Revision: 3.6
APPLIES TO
  • Microsoft Windows 2000 Service Pack 1
  • Microsoft Windows 2000 Service Pack 2
  • Microsoft Windows 2000 Advanced Server SP1
  • Microsoft Windows 2000 Advanced Server SP2
  • Microsoft Windows 2000 Service Pack 1
  • Microsoft Windows 2000 Service Pack 2
Keywords: 
kbhotfixserver kbqfe kbbug kbdirservices kbfix kbwin2000presp3fix kbwin2000sp3fix KB286834

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