DOCUMENT:Q262104 08-AUG-2001 [winnt] TITLE :Options Are Not Sent to DHCP Clients Using DHCP Inform Packets PRODUCT :Microsoft Windows NT PROD/VER:winnt:4.0 OPER/SYS: KEYWORDS:kbenv ====================================================================== ------------------------------------------------------------------------------- The information in this article applies to: - Microsoft Windows NT Server version 4.0 ------------------------------------------------------------------------------- SYMPTOMS ======== Dynamic Host Configuration Protocol (DHCP) clients that request additional option information from a Windows NT 4.0 (any service pack) DHCP server by issuing a DHCP Inform packet, do not receive the additional information from the DHCP server. CAUSE ===== This behavior occurs because Windows NT 4.0 does not support DHCP Inform packets. When a client sends a DHCP Inform packet, the Windows NT 4.0 DHCP Server ignores the DHCP Inform packet because it does not know how to process it. RESOLUTION ========== To configure custom options to be sent to a client from a Windows NT 4.0 DHCP server, the client must request the options in the Parameter Request List of the DHCP Request packet or upgrade the DHCP server to Windows 2000 DHCP server. MORE INFORMATION ================ Microsoft Windows 2000 DHCP server does support DHCP Inform packets. Additional query words: DHCPInform rfc 2132 ====================================================================== Keywords : kbenv Technology : kbWinNTsearch kbWinNT400search kbWinNTSsearch kbWinNTS400search kbWinNTS400 Version : winnt:4.0 Issue type : kbprb ============================================================================= 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.