Microsoft KB Archive/938134

= After you restart the DHCP Server service, some DHCP options disappear on a Windows Server 2003-based DHCP server =

Article ID: 938134

Article Last Modified on 11/2/2007

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APPLIES TO


 * Microsoft Windows Server 2003, Standard Edition (32-bit x86)
 * Microsoft Windows Server 2003, Web Edition
 * Microsoft Windows Server 2003, Enterprise Edition (32-bit x86)
 * Microsoft Windows Server 2003, Datacenter Edition (32-bit x86)
 * Microsoft Windows Server 2003, Standard x64 Edition
 * Microsoft Windows Server 2003, Enterprise x64 Edition
 * Microsoft Windows Server 2003, Datacenter x64 Edition
 * Microsoft Windows Server 2003, Enterprise Edition for Itanium-based Systems
 * Microsoft Windows Server 2003, Datacenter Edition for Itanium-Based Systems

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SYMPTOMS
Consider the following scenario. You use a Microsoft Windows Server 2003-based DHCP server to assign TCP/IP configurations to client computers. Then, you restart the DHCP Server service. In this scenario, some DHCP options disappear on the DHCP server.

This problem occurs if the following conditions are true:
 * Some user classes are created on the DHCP server.
 * The user classes are referenced in the Scope Options properties or in the Server Options properties.
 * One or more user classes are removed from the DHCP server.
 * The references are not removed before the user classes are removed.

When this problem occurs, client computers do not have the correct TCP/IP configurations. Therefore, the client computers cannot communicate with other computers on the network.



CAUSE
This problem occurs because the DHCP Server service does not correctly handle orphaned references. In this situation, some valid DHCP options are missing during the DHCP Server service restart.



Hotfix information
A supported hotfix is now available from Microsoft. However, it is intended to correct only the problem that is described in this article. Apply it only to systems that are experiencing this specific problem. This hotfix may receive additional testing. Therefore, if you are not severely affected by this problem, we recommend that you wait for the next Windows Server 2003 service pack that contains this hotfix.

To resolve this problem immediately, contact Microsoft Customer Support Services to obtain the hotfix. For a complete list of Microsoft Customer Support Services telephone numbers and information about support costs, visit the following Microsoft Web site:

http://support.microsoft.com/contactus/?ws=support

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.

Prerequisites
To apply this hotfix, you must have Windows Server 2003 Service Pack 1 (SP1) or Windows Server 2003 Service Pack 2 (SP2) installed on the computer. For more information, click the following article number to view the article in the Microsoft Knowledge Base:

889100 How to obtain the latest service pack for Windows Server 2003

Restart requirement
After you apply this hotfix, you must restart the DHCP Server service.

Hotfix replacement information
This hotfix does not replace any other hotfixes.

File information
The English version of this hotfix has the file attributes (or later file attributes) that are listed in the following table. The dates and times for these files are listed in Coordinated Universal Time (UTC). When you view the file information, it is converted to local time. To find the difference between UTC and local time, use the Time Zone tab in the Date and Time item in Control Panel.

Windows Server 2003 with Service Pack 2, x64-based versions


WORKAROUND
To work around this problem, remove all references to the user class from the Scope Options properties and from the Server Options properties before you delete the user class.



STATUS
Microsoft has confirmed that this is a problem in the Microsoft products that are listed in the &quot;Applies to&quot; section.



MORE INFORMATION
For more information about DHCP user classes, visit the following Microsoft Web site:

http://technet.microsoft.com/en-us/library/bb727003.aspx

For more information about the standard terminology that is used to describe Microsoft software updates, click the following article number to view the article in the Microsoft Knowledge Base:

824684 Description of the standard terminology that is used to describe Microsoft software updates

Keywords: kbexpertiseinter kbwinserv2003postsp2fix kbbug kbfix kbhotfixserver kbqfe kbpubtypekc KB938134

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