DOCUMENT:Q162396 08-AUG-2001 [winnt] TITLE :Problem with DHCP Decline Feature in Service Pack 2 PRODUCT :Microsoft Windows NT PROD/VER::4.0 SP2 OPER/SYS: KEYWORDS:kbnetworkkbbuglist kbfixlist ====================================================================== ------------------------------------------------------------------------------- The information in this article applies to: - Microsoft Windows NT Workstation version 4.0 SP2 - Microsoft Windows NT Server version 4.0 SP2 ------------------------------------------------------------------------------- SYMPTOMS ======== A Windows NT 4.0 Service Pack 2 DHCP client may fail to obtain a DHCP lease if a duplicate IP address exists on the network. DHCP logs an error in the event log with event ID 1008. CAUSE ===== Windows NT Service Pack 2 includes an update to the DHCP client that improves the ability of a workstation to handle duplicate IP addresses. Upon receiving a DHCP lease, it ARPs for the IP address that was assigned. If a response is received (indicating that the address is already in use by another device on the network) it issues a DHCP decline to the server. The server then marks the address as "bad" and does not attempt to assign that IP address to any device. The client re-issues a DHCP DISCOVER packet and starts the lease process over again. For more information on this, please see the following article in the Microsoft Knowledge Base: ARTICLE-ID: Q161430 TITLE : DHCP: Detecting and Flagging Duplicate IP Addresses DHCP clients that also have RAS installed on them do not perform this DHCP decline operation successfully. RESOLUTION ========== A new version of Rasarp.sys is available that corrects this problem. STATUS ====== Microsoft has confirmed this to be a problem in Windows NT version 4.0 Service Pack 2. This problem was corrected in the latest Microsoft Windows NT 4.0 U.S. Service Pack. For information on obtaining the service pack, query on the following word in the Microsoft Knowledge Base (without the spaces): S E R V P A C K Additional query words: 4.00 prodnt event 1008 sp2 ====================================================================== Keywords : kbnetwork kbbuglist kbfixlist Technology : kbWinNTsearch kbWinNTWsearch kbWinNTW400search kbWinNT400search kbWinNTW400sp2 kbWinNTSsearch kbWinNTS400sp2 kbWinNTS400search Version : :4.0 SP2 Issue type : kbbug ============================================================================= THE INFORMATION PROVIDED IN THE MICROSOFT KNOWLEDGE BASE IS PROVIDED "AS IS" WITHOUT WARRANTY OF ANY KIND. MICROSOFT DISCLAIMS ALL WARRANTIES, EITHER EXPRESS OR IMPLIED, INCLUDING THE WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE. IN NO EVENT SHALL MICROSOFT CORPORATION OR ITS SUPPLIERS BE LIABLE FOR ANY DAMAGES WHATSOEVER INCLUDING DIRECT, INDIRECT, INCIDENTAL, CONSEQUENTIAL, LOSS OF BUSINESS PROFITS OR SPECIAL DAMAGES, EVEN IF MICROSOFT CORPORATION OR ITS SUPPLIERS HAVE BEEN ADVISED OF THE POSSIBILITY OF SUCH DAMAGES. SOME STATES DO NOT ALLOW THE EXCLUSION OR LIMITATION OF LIABILITY FOR CONSEQUENTIAL OR INCIDENTAL DAMAGES SO THE FOREGOING LIMITATION MAY NOT APPLY. Copyright Microsoft Corporation 2001.