To:
Mark.Andrews@nominum.com
cc:
Måns Nilsson <mansaxel@nic-se.se>, dnsop@cafax.se
From:
Robert Elz <kre@munnari.OZ.AU>
Date:
Tue, 06 Feb 2001 21:58:29 +0700
In-reply-to:
Your message of "Wed, 07 Feb 2001 00:58:24 +1100." <200102061358.f16DwON92989@drugs.dv.isc.org>
Sender:
owner-dnsop@cafax.se
Subject:
Re: Bogus nic.fr behavior
Date: Wed, 07 Feb 2001 00:58:24 +1100
From: Mark.Andrews@nominum.com
Message-ID: <200102061358.f16DwON92989@drugs.dv.isc.org>
| With re-delgation the NS RRset to be
| delegated to should be a sub-set of those in the zone as that
| permits smooth transfer.
That's nonsense - the parent data is just glue, and should always
be identical to that in the zone itself.
To get "smooth transfer" the new servers should be set up, and then
the old servers made secondary for that (so they start giving out the
new data). Then the parent should be updated.
That depends upon the DNS property of there being old data for a while
after a change (the parent has old data until it s updated) but never
does the data held by the parent not reflect the data in the autjoritative
zone file, at some particular point in time.
Allowing configurations where the new servers list the old servers just
begs for the new servers to do that, without the old servers ever having
any idea it is happening - which is a genuine recipe for making a
gigantic mess.
kre