Problem with duplicate address - PXE client

[Richard Migneron]

Hi all,
We have setup Dynamic DHCP & DNS servers.  We are currently using dhcp
3.1.0a3 and bind 9.3.2 !

A client boots under PXE (PXE needs to be before HD in the boot order).

The DHCP server gives it an address and updates the DNS. Here is the lease
info :

lease 10.136.20.146 {
  starts 5 2007/04/13 12:43:14;
  ends 6 2007/04/14 00:43:14;
  cltt 5 2007/04/13 12:43:14;
  binding state active;
  next binding state free;
  hardware ethernet 00:11:85:61:e1:ad;
  set ddns-rev-name = "146.20.136.10.in-addr.arpa.";
  set ddns-txt = "00e5e796ce38030993796be6c99ea26b6d";
  set ddns-fwd-name = "bkwks042.caic.com";
}

All is good !

Then, when the PXE server tells the client that there is nothing special to
do, PXE exits and boots windows (W2K).  That happens about 1 minute later.

And the weird thing, is that my DHCP server gives another address, BUT
doesn't update the DNS.  Here is the lease info :

lease 10.136.20.224 {
  starts 5 2007/04/13 12:44:15;
  ends 6 2007/04/14 00:44:15;
  cltt 5 2007/04/13 12:44:15;
  binding state active;
  next binding state free;
  hardware ethernet 00:11:85:61:e1:ad;
  uid "\001\000\021\205a\341\255";
  client-hostname "BKWKS042";
}

Now, WHY does it do this ?  And the worst part, is that it is not happening
on all the clients, my TTL for the lease is in the order of 12 hours, with a
max of 24 hours.  Attached is the dhcpd.conf file.  The host line (from the
include file) is :

host bkwks042 { hardware ethernet 00:11:85:61:E1:AD; ddns-hostname bkwks042;
option host-name "bkwks042"; }

It looks like the PXE software is not releasing the address in time.  But,
my PXE guys tell me that there is nothing they can do on that side of the
software !!!

Anybody has an idea ??

Thanks in advance,

Richard
_________________
Richard Migneron
Yahoo Messenger ID: rmigneron
PGP Fingerprint : EFFE 44E3 894A 7051 F86E E532 4880 9534 E1FB BD33
"Noir comme le diable, chaud comme l'enfer,
pur comme un ange, doux comme l'amour",
Charles-Maurice de Talleyrand-Périgord (1754-1838)