XP clients sometimes ignore DHCPOFFERs

Sebastian Hagedorn Hagedorn at uni-koeln.de
Mon Mar 20 15:16:53 UTC 2006

--On 20. März 2006 09:58:27 -0500 John Wobus <jw354 at cornell.edu> wrote:
> This is a problem I've seen.  It happened when the PC had
> an address and mask configured at the time that the OFFER
> was sent, and was masking it out.  Some PCs at some
> Windows levels would manage to configure the 169 address
> before the DHCP sequence had completed and would often end
> up in this state. Most PCs did not have the problem.  When I got
> my hands on an example PC, I found the quickest way to recover
> was to unplug and plug in the PC from/to the net.  Renew did
> nothing.
> To prevent the problem, we switched our router broadcast
> addresses from SPECIFIC.SUBNET'S.ADDRESS.255 to
>  I assume Microsoft's server uses the
> latter.

Thanks for the idea. We have just switched one subnet's broadcast address 
accordingly. I will report if this has the desired effect.

Cheers, Sebastian Hagedorn
     .:.Sebastian Hagedorn - RZKR-R1 (Gebäude 52), Zimmer 18.:.
Zentrum für angewandte Informatik - Universitätsweiter Service RRZK
.:.Universität zu Köln / Cologne University - Tel. +49-221-478-5587.:.
                   .:.:.:.Skype: shagedorn.:.:.:.

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