DHCP Server of Service Pack 4 Ignores Reservations

• Microsoft Windows NT Server version 4.0 SP4
• Microsoft Windows NT Server, Enterprise Edition version 4.0 SP4
• Microsoft Windows NT Server version 4.0 SP4, Terminal Server Edition

SYMPTOMS

Your DHCP server has IP address reservations that are outside of your DHCP scope. After you apply Service Pack 4, clients that match these reservations no longer receive IP addresses from the server.

CAUSE

The Service Pack 4 release includes several quality improvement fixes to correct known Dynamic Host Configuration Protocol (DHCP) problems. One was to check for invalid database records that contain out of scope IP addresses. Unfortunately, this also includes "Out of Scope" reservations which are legal.

RESOLUTION

To resolve this problem, obtain the latest service pack for Windows NT 4.0 or Windows NT Server 4.0, Terminal Server Edition or the individual software update. For information on obtaining the latest service pack, please go to:

• http://www.microsoft.com/Windows/ServicePacks/


-or-


• Q152734 How to Obtain the Latest Windows NT 4.0 Service Pack

http://www.microsoft.com/support/supportnet/overview/overview.asp

STATUS

Microsoft has confirmed this to be a problem in the Microsoft products listed at the beginning of this article. This problem was first corrected in Windows NT version 4.0 and Windows NT Server 4.0, Terminal Server Edition Service Pack 5.

MORE INFORMATION

For more information about changes to DHCP in Service Pack 4, please see the following articles in the Microsoft Knowledge Base:

Q184693 DNS/DHCP/WINS Release Notes for Windows NT 4.0 SP4 Update

Q196066 Limitations Creating DHCP Reservations

Additional query words: 4.00 sp4

Keywords : kbfix4.00 nt4sp5fix kbbug4.00.sp4
Version : winnt:4.0 SP4
Platform : winnt
Issue type : kbbug