BootP Client Names Disappear in DHCP Manager

 Last reviewed: December 16, 1997
Article ID: Q167708
The information in this article applies to:
  • Microsoft Windows NT Server version 4.0

SYMPTOMS

When a BOOTP client gets an IP address, the "Reservation" changes to "Reservation in use." However, the client name is removed from the list. As a result there is no identifier in the list to differentiate which IP address belong to which client.

CAUSE

The DHCP server does not handle the case correctly when the BOOTP client sends a Null host name in the DHCP Request Packet.

RESOLUTION

Obtain the following fix or wait for the next Windows NT service pack.

This fix should have the following timestamp: 

   08/07/97  07:04 PM               116,496 Dhcpssvc.dll (Intel)
   08/07/97  06:03 PM               185,104 Dhcpssvc.dll (Alpha)
NOTE: Service Pack 3 must be applied to Windows NT 4.0 prior to applying this fix.

STATUS

Microsoft has confirmed this to be a problem in Windows NT version 4.0. A supported fix is now available, but has not been fully regression-tested and should be applied only to systems experiencing this specific problem. Unless you are severely impacted by this specific problem, Microsoft recommends that you wait for the next Service Pack that contains this fix. Contact Microsoft Technical Support for more information.

MORE INFORMATION

Normally, when an administrator has set up a reservation for a BootP client on a Windows NT Dynamic Host Configuration Protocol (DHCP) server, the Active Leases list includes the address, client name, and "Reservation." When a DHCP client boots, the "Reservation" changes to "Reservation in use."

If after applying the above-mentioned fix your DHCP Server continues to experience the symptoms, then verify that you have configured Option 12 for the BootP Client. When a BootP Client sends a request to the DHCP Server and the host name is blank, the DHCP Server looks in the registry for the HostName (Option 12) for use in propogating the Client Name field. If Option 12 is left blank, it will leave the client name blank.

To correctly configure the BootP Client information, fill out the HostName information in the Option 12 field of the entry. Once the Bootp request is received, the Server will move the HostName option to the ClientName field. 

Keywords          : kbbug4.00 kbfix4.00 NTSrv nttcp kbnetwork
Version           : WinNT:4.0
Platform          : winnt
Issue type        : kbbug
Solution Type     : kbfix

================================================================================

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.

Last reviewed: December 16, 1997
© 1998 Microsoft Corporation. All rights reserved. Terms of Use.