Linux clients working, XP not.

Jeff Sumner Jeff.Sumner at
Fri Apr 11 17:20:52 UTC 2008

Nah, no relay, and thanks for the reply.

I've seen that, and have tried applying the registry fixes- but it's not

Linux DHCP with the same builds seem to work okay, meaning that there might
well be an AIX problem.
What's funky is that I DO see packets coming back on Wireshark (running on
the system requesting DHCP)- the XP box just doesn't act like it hears 'em.
The DHCP Discover comes into the AIX box with everything looking great, but
has the 169.254 autoconfig address in it (option 50). I've set up a pool in
the DHCP server trying to get the DHCP server to send out a NAK for the
169.254 (no, it's not coming over as a renewal), but that's only because I'm
starting to get short of ideas.


On 4/11/08 1:05 PM, "Randall C Grimshaw" <rgrimsha at> wrote:

> If there is a relay involved, google for KB928233 and such having to do
> with broadcast responses.
> Randy
> -----Original Message-----
> From: dhcp-users-bounce at [mailto:dhcp-users-bounce at] On
> Behalf Of Jeff Sumner
> Sent: Friday, April 11, 2008 12:04 PM
> To: dhcp-users at
> Subject: Linux clients working, XP not.
> Folks,
> Can someone point me to any documentation for troubleshooting why Linux
> clients would work with a particular configuration from an
> implementation of
> ISC DHCP but XP clients won't?
> I see packets coming in and going out of the DHCP server via a sniffer,
> but
> the XP clients won't send an ACK, where the Linux boxes will.
> The XP clients don't get addresses.
> I'm poking around Google, and see several instances of folks having
> problems
> with this, but no fixes are listed- the threads just die off. It seems
> that
> sometimes XP reboots fix the trouble, but that's not helping here.
> Again,
> Linux guests work fine, to the point of DDNS working extremely well.
> Someone brought an XP workstation into the lab and suddenly, we have a
> troubleshooting opportunity!
> Server versions tried are DHCP3.1.1rc1, 3.1.0 and 3.0.6. Host is AIX 5.1
> and
> built with GCC.
> Network is private, 192.168.0. Many options defined, but nothing seems
> to
> get the XP boxes to ACK.
> J
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