DOCUMENT:Q195932  16-MAY-2002  [winnt]
TITLE   :DHCP Server of Service Pack 4 Ignores Reservations
PRODUCT :Microsoft Windows NT
PROD/VER:winnt:4.0 SP4
OPER/SYS:
KEYWORDS:kbWinNT400sp5fix

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The information in this article applies to:

 - 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 
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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

For information on obtaining the individual software update, contact Microsoft
Product Support Services. For a complete list of Microsoft Product Support
Services phone numbers and information on support costs, please go to the
following address on the World Wide Web:

   http://support.microsoft.com/default.aspx?scid=fh;EN-US;CNTACTMS


STATUS
======

Microsoft has confirmed this to be a problem in the Microsoft products that are
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

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Keywords          : kbWinNT400sp5fix 
Technology        : kbWinNTsearch kbWinNT400search kbWinNTSsearch kbWinNTSEntSearch kbWinNTSEnt400sp4 kbWinNTS400sp4 kbWinNTS400search kbNTTermServ400sp4 kbNTTermServSearch
Version           : winnt:4.0 SP4
Hardware          : ALPHA x86
Issue type        : kbbug
Solution Type     : kbfix

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