DOCUMENT:Q186462 10-AUG-2001 [winnt] TITLE :DHCPLOC Should Not Be Run from DHCP Servers PRODUCT :Microsoft Windows NT PROD/VER:WinNT:4.0 OPER/SYS: KEYWORDS: ====================================================================== ------------------------------------------------------------------------------- The information in this article applies to: - Microsoft Windows NT Server version 4.0 ------------------------------------------------------------------------------- SYMPTOMS ======== The Dhcploc.exe utility in the Windows NT Resource Kit is designed to assist in determining what Dynamic Host Configuration Protocol (DHCP) servers are available to clients on a particular network segment. If you run Dhcploc.exe on a computer that is acting as a DHCP server, you may notice that the DHCP server no longer responds to all requests for IP addresses from DHCP clients. CAUSE ===== The Dhcploc.exe utility listens for DHCP servers by taking DHCP packets off the IP stack. However, the utility has no means to reintroduce DHCP packets to the stack. Therefore, running this utility on a DHCP server will prevent DHCP packets from reaching the DHCP server service, and the DHCP server will appear not to respond. RESOLUTION ========== Run Dhcploc.exe only from computers not acting as DHCP servers. STATUS ====== This behavior is by design. Additional query words: dhcploc rogue ====================================================================== Keywords : 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.