Re: [dnsext] Short introduction to zone cuts?

In message <946E9EC4-9872-4A98-BCEB-3CD7420929A1@vpnc.org>, Paul Hoffman writes
:
> Over on the dns-operations list, the issue of zone cuts has come up, and even
>  normally-careful people have gotten it wrong. Is there a readable introducti
> on to zone cuts and how they affect zone operators? If not, someone should re
> ally consider writing a two-page informational RFC on the subject and have it
>  reviewed here (even if it is after this WG shuts down) before publication. I
>  suspect that such an RFC will be more valuable to the Internet than many of 
> the ones we have done here.
> 
> --Paul Hoffman

RFC 1034 say all you need to say for zone operators about NS record.
Nameserver developer need to know more.

Section 4.2.2. "Administrative considerations" covers just about
all that one needs to know in particular "As the last installation
step, the delegation NS RRs and glue RRs necessary to make the
delegation effective should be added to the parent zone.  The
administrators of both zones should insure that the NS and glue RRs
which mark both sides of the cut are consistent and remain so."
This apply to both registries and registrars as the are the
administators of the relevent zones.

Failure to follow that advice causes most of the operational problems
we see in the DNS.

Mark
-- 
Mark Andrews, ISC
1 Seymour St., Dundas Valley, NSW 2117, Australia
PHONE: +61 2 9871 4742                 INTERNET: marka@isc.org
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