DOCUMENT:Q123986 08-AUG-2001 [winnt] TITLE :DHCP Server Excludes Address Clusters Within a Valid Scope PRODUCT :Microsoft Windows NT PROD/VER:3.50 OPER/SYS: KEYWORDS: ====================================================================== ------------------------------------------------------------------------------- The information in this article applies to: - Microsoft Windows NT Server version 3.5 ------------------------------------------------------------------------------- SYMPTOMS ======== When a scope is defined so that it includes a valid set of addresses in a range, but it excludes or reserves addresses within the last 32 specific addresses of that scope, address clusters within the legal range of the scope may not be available to the dynamic host configuration protocol (DHCP) server for assignment. For example, a scope with the following settings Range Start: 161.240.8.1 Range End: 161.240.15.254 Subnet Mask: 255.255.248.0 Excluded Addresses: 161.240.15.126 -- 161.240.15.150 161.240.15.181 -- 161.240.15.184 161.240.15.187 -- 161.240.15.254 Reserved Addresses: 161.240.15.185, 186 results in the following pattern of DHCP server IP address assignments: 161.240.9.0 161.240.9.224 -- 161.240.9.255 161.240.10.0 161.240.10.224 -- 161.240.10.255 161.240.11.0 161.240.11.224 -- 161.240.11.255 161.240.12.0 161.240.12.224 -- 161.240.12.255 In this example, addresses within the range of 161.240.XX.0 to 161.240.XX.224 cannot be assigned by the DHCP server even though they are valid addresses within the defined scope. STATUS ====== Microsoft has confirmed this to be a problem in Windows NT Server version 3.5. This problem was corrected in Windows NT version 3.51. Additional query words: wfw wfwg prodnt ====================================================================== Keywords : Technology : kbWinNTsearch kbWinNT350search kbWinNTSsearch kbWinNTS350 kbWinNTS350search Version : 3.50 ============================================================================= 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.