Fwd: Problem with duplicate address - PXE client

Richard Migneron richard at migneron.com
Fri Apr 13 16:13:37 UTC 2007

How do you disable DDNS for PXE when you don't know that the client is in
PXE mode.

Our PXE server is on Novell Netware 6.5, but in the DHCP configuration file
we never need to add anything to tell the DHCP server to handover the client
to the Novell PXE server.  (no next-server, and no filename instructions are
required) .  See attached conf file.

I've just read about the "allow/deny duplicates".   Anything there would
help ??



---------- Forwarded message ----------
From: David W. Hankins <David_Hankins at isc.org >
Date: 13 avr. 2007 17:23
Subject: Re: Problem with duplicate address - PXE client
To: dhcp-hackers at isc.org

On Fri, Apr 13, 2007 at 04:41:24PM +0200, Richard Migneron wrote:
>   hardware ethernet 00:11:85:61:e1:ad;
>   hardware ethernet 00:11:85:61:e1:ad;
>   uid "\001\000\021\205a\341\255";
> Now, WHY does it do this ?

It gives different leases because the client has identified itself
differently.  With a client ID in the one case, without one in
the other.

This is also why DDNS is failing - the TXT record we use as a
DHCID RR mockup will be different for these two clients.

You can disable ddns updates for PXE specifically, and it might
also be a good idea to set lower lease times for PXE.

In future, dhcp-users would be a bit more topical for this.

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