Leases for fixed-address hosts not written to lease file?

John Hascall john at
Wed May 23 16:12:09 UTC 2007

> On Wed, May 23, 2007 at 08:29:12AM -0500, John Hascall wrote:
> > This seems to work best if you use one of the "ignore the uid"
> > patches that are out there so that you can just key on the mac-address
> > (esp if you have PXE or similar in your environment).

> With the PXE+Windows combination, isn't that a failure mode?

> I mean, if the PXE client reboots while the lease is still active,
> the DHCP server should refuse to allocate it to the client ("no free
> leases")...

I'm not sure I'm following your question exactly, but...

It seems to me it goes like this.
In stock-dhcpd, you can have the situation that, say

         host has a lease it got when it presented a uid
         host boots w/o a uid and can't get a least because
         "no free leases"

         <or the other way around.>

Hence the value of the 'evil standards-non-compliant' ignore
the uid patches out there -- it looks like the same host no
matter if sends a uid or not and regardless if the uid value
changes or not.

Obviously this has some shortcomings for some uses as well
(perhaps you want to dual-boot O/Ses and get different values
you could do that through sending different uids).


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