This article was previously published under Q286834
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.
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
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.
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:
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
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