on commit/release/expiry

Hendrickx Stijn Stijn.Hendrickx at uzgent.be
Tue Aug 18 07:51:20 UTC 2009

Yes, the built-in ddns behaviour isn't satifying and we want to write
our own scripts for the events (but only the "on commit" event is
triggered for hosts witch fixed-address).

In our DHCP version ("Internet Systems Consortium DHCP Server
V3.0.5-RedHat"), the "reserved lease" isn't available...

In the meantime I found info on the scripts using "man dhcp-eval".


-----Oorspronkelijk bericht-----
Van: dhcp-users-bounces at lists.isc.org
[mailto:dhcp-users-bounces at lists.isc.org] Namens Simon Hobson
Verzonden: maandag 17 augustus 2009 15:59
Aan: Users of ISC DHCP
Onderwerp: Re: on commit/release/expiry

Hendrickx Stijn wrote:

>I want to use the "on commit", "on release" and "on expiry" events 
>to keep our DNS server up to date (using ns-update (DDNS)).

I assume you want to do something that the built in ddns doesn't handle

>All our clients are configured with a fixed-address.
>But the "release" and "expriy" events are not triggered for clients 
>configured with a fixed-address.
>Is there any way to work around this (and also trigger the 
>release/expiry events for "fixed-address" clients)?

Use reserved leases ?

A reserved lease behaves exactly like a standard lease (ie it goes 
through the same lifecycle) except that the address will never be 
re-assigned to another client. I believe the only way to set it is to 
manually edit the leases file to add the reserved statement.

Simon Hobson

Visit http://www.magpiesnestpublishing.co.uk/ for books by acclaimed
author Gladys Hobson. Novels - poetry - short stories - ideal as
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