Re: [DNSOP] abandoning ANAME and standardizing CNAME at apex

Stephane Bortzmeyer <bortzmeyer@nic.fr> Mon, 17 September 2018 07:14 UTC

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Date: Mon, 17 Sep 2018 09:14:14 +0200
From: Stephane Bortzmeyer <bortzmeyer@nic.fr>
To: Mukund Sivaraman <muks@mukund.org>
Cc: Petr =?utf-8?B?xaBwYcSNZWs=?= <petr.spacek@nic.cz>, "dnsop@ietf.org WG" <dnsop@ietf.org>
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Subject: Re: [DNSOP] abandoning ANAME and standardizing CNAME at apex
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On Sun, Sep 16, 2018 at 03:26:56PM +0530,
 Mukund Sivaraman <muks@mukund.org>; wrote 
 a message of 66 lines which said:

> Adding resolver support (to resolvers that don't have it, i.e.,
> vs. RFC 1035) does not appear to break current DNS, i.e., it can be
> proposed now.

[Algorithm deleted]

The difficult thing is not to specify what the new resolvers will have
to do, but to describe what will happen with the current
resolvers. What will happen when "CNAME at apex" will be deployed,
assuming X % of the resolvers will not be upgraded?