DHCP Server Does Not Update the A Record on the DNS Server If Option 81 Is Received with the S Bit Set

View products that this article applies to.

This article was previously published under Q289583

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SYMPTOMS

DHCP option 81 (option code 0x51, or decimal 81) which is named FQDN (fully qualified domain name) allows a client to request that the DHCP server perform DNS name registration on behalf of the client. If a Windows 2000-based DHCP server is configured to use the Update DNS only if DHCP client requests option and is not configured to register earlier (down-level) clients, and this option is sent to the Microsoft DHCP server with the S bit set (with the flags set to 1), the DHCP server registers the PTR record but does not register the A record on behalf of the client.

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CAUSE

This issue occurs because the DHCP server does not handle the condition in which the client sends the S bit set.

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RESOLUTION

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 (http://support.microsoft.com/kb/260910/EN-US/ ) 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
   --------------------------------------------------------
   7/31/2001   06:20p  5.0.2195.3913  271,120  Dhcpssvc.dll

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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.

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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 (http://support.microsoft.com/kb/265173/EN-US/ ) 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 (http://support.microsoft.com/kb/296861/EN-US/ ) 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 (http://support.microsoft.com/kb/249149/EN-US/ ) Installing Microsoft Windows 2000 and Windows 2000 Hotfixes

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