DNS update via dhcp and static entries

Simon Hobson shobson0309 at colony.com
Fri Oct 8 07:51:39 UTC 2004

Andreas Moroder wrote:

>this is a little bit OT but I did not find a dhcp newsgroup.
>Our dhcp updates the dns and all works well except for machines where we
>have set fixed IP addresse via MAC.
>Is it dhcp that does not send the updates or can it be a problem in bin ?

There is, you'll find us over at :

List Archives : http://www.isc.org/ops/lists/
Subscribe     : http://www.isc.org/sw/dhcp/dhcp-lists.php

By default, the ISC DHCP server (you didn't mention which one) 
doesn't do DNS updates for statically defined clients. There are a 
number of reasons, some of them technical, for this, but it boils 
down to : if it's got a static address, just stick in the DNS records 
and be done with it.

Norman Zhang wrote:

>My Windows Server 2003 has a static IP, but AD requires it to DDNS.

That is something different. The multitude of DNS records created by 
AD are not put there by the DHCP server that gave it a lease, they 
are put there by the processes that manage the services the machine 



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Simon Hobson MA MIEE, Technology Specialist
Colony Gift Corporation Limited
Lindal in Furness, Ulverston, Cumbria, LA12 0LD
Tel 01229 461100, Fax 01229 461101

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