XP clients sometimes ignore DHCPOFFERs

David W. Hankins David_Hankins at isc.org
Wed Mar 15 21:14:13 UTC 2006

On Wed, Mar 15, 2006 at 05:09:51PM +0100, Sebastian Hagedorn wrote:
> We have noticed problems with at least some Windows XP SP2 clients. Users 
> report that they were unable to get leases from our dhcpd 3.0.3 server. In 
> our logs we can see DHCPDISCOVER and DHCPOFFER lines for those clients, but 
> the clients never send a DHCPREQUEST. Most of the time this situation can 
> be remedied by rebooting the client, but apparently not always. Repairing 
> the network connection doesn't seem to do any good, whereas a cycle of 
> "ipconfig release / ipconfig renew" in cmd.exe seems to be successful.

We have several XP SP2 boxes here at ISC and have never witnessed this.

If it's not taking one of the OFFERs, I don't know that there's a lot we
can do.

> We have pcap files of the sniffed sessions if that would help. I'd be 
> grateful for any suggestions.

Fire them at dhcp-bugs at isc.org as a regular attachment (if they're not
huge).  I'm a bit stretched this week and next but I might have a moment
to peek.

David W. Hankins		"If you don't do it right the first time,
Software Engineer			you'll just have to do it again."
Internet Systems Consortium, Inc.		-- Jack T. Hankins

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