On Mon Dec 21 18:39:07 2015, dmrz@illinois.edu wrote:
> When a client using option 61 client identifier moves to a new network
> and obtains a lease, its lease for an IP on the old network is
> inappropriately freed by dhcpd.

Hi, David --

Thank you for the report and the packet captures;
we've recently been looking into this issue because
someone else just pointed it out to us about a week
ago.

What we told them was that we believe the behavior
of the server is incorrect in this case and we'll
take a look at fixing it, but the schedule for the
maintenance releases already in progress is already
set (and nearing its end) so unless this is causing
a crisis for operators it will probably take a little
while before we can schedule work on it.

But it is on our list to look into.

Michael McNally
ISC Support