XP clients sometimes ignore DHCPOFFERs
Jeff Wieland
wieland at purdue.edu
Thu Mar 16 17:51:37 UTC 2006
I'm wondering is this relates to the release-on-shutdown option, option
code 2? We implement it like:
option space MSFT;
option MSFT.release-on-shutdown code 2 = unsigned integer 32;
class "win2k-clients" {
match if option vendor-class-identifier = "MSFT 5.0";
vendor-option-space MSFT;
option MSFT.release-on-shutdown 1;
}
This makes XP & 2K clients release their IP addresses on shutdown.
David W. Hankins wrote:
> The technote quoted says it only happens on "non microsoft" DHCP servers.
>
> I wonder what MS's server is doing to get its clients out of this loop.
>
> This is all-hands week at ISC. Because of that I'm fairly useless.
> IETF is next week.
>
> I won't have a chance to look in our lab for a few weeks at the earliest.
>
>
> Someone should be able to find out by getting a client into this state (it
> sounds like you need to give it a really long lease) and then attach it to
> a network where someone enabled "share network" on a regular Windows XP
> box.
>
> A pcap of that would save me a lot of effort.
>
--
Jeff Wieland | Purdue University
Network Systems Administrator | IT-I UNIX Platforms
Voice: (765)496-8234 | 401 South Grant Street
FAX: (765)496-1380 | West Lafayette, IN 47907-1061
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