No client hardware address?

[David W. Hankins]

On Mon, Oct 29, 2007 at 01:47:54PM +0100, Shane Kerr wrote:
> Ashley M. Kirchner wrote:
> >    So, can anyone think of why the machine would quit sending it's
> > hardware address?  A reboot will fix the problem ... every time.  Only
> > to re-appear again when the lease expires hours later...
> 
> This is actually kind of weird. Clients send DHCPINFORM when they have an IP
> address configured elsewhere (like a static address, or something else). So the
> client should be sending DHCPREQUEST, not DHCPINFORM.
> 
> Looks like a bug in the client.

It's different software.  I bet it's something using .Net's interface
to DHCP.  We've seen this before from Flash Media Proxy Autodetection.

Sending a zero-length chaddr on a DHCPINFORM is incompliant with
RFC2131.  This doesn't seem to stop them from doing it, and doing so
appears to be interoperable with other DHCP servers.

-- 
Ash bugud-gul durbatuluk agh burzum-ishi krimpatul.
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-- 
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