failover with active / standby configuration

Glenn Satchell Glenn.Satchell at
Tue Mar 3 12:30:58 UTC 2009

>Date: Mon, 2 Mar 2009 15:51:34 -0800
>From: "David W. Hankins" <David_Hankins at>
> On Tue, Mar 03, 2009 at 10:02:40AM +1100, Glenn Satchell wrote:
> > the latest 3.1.x or 4.1.x release. Both of these should work unchanged
> > with your current config files, although you may need to add
> > "authoritative;" in the global scope as the default changed somewhere
> > about 3.0.4 or 5.
> I don't think we ever changed the default so long as I've been working
> here...did you switch package distributions?
> I've often thought about switching the default the other way...
> -- 
> David W. Hankins	"If you don't do it right the first time,
> Software Engineer		     you'll just have to do it again."
> Internet Systems Consortium, Inc.		-- Jack T. Hankins

David, you are correct of course. dhcpd-2.0 was authoritative by
default, that changed to not authoritative in 3.0. The idea being to
prevent unauthorised dhcp servers automatically nacking legitimate
clients (at least that's what it says in the dhcpd.conf man page).

Flipping the default will probably just make the other 50% of users
unhappy :)


PS Do you like the fact that your reply was sent before my original
post? Wonders of timezones :)

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