Re: [DNSOP] Terminology question: split DNS

Robert Edmonds <edmonds@mycre.ws> Mon, 19 March 2018 18:26 UTC

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Date: Mon, 19 Mar 2018 14:26:49 -0400
From: Robert Edmonds <edmonds@mycre.ws>
To: Artyom Gavrichenkov <ximaera@gmail.com>
Cc: Paul Hoffman <paul.hoffman@vpnc.org>, dnsop <dnsop@ietf.org>
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Subject: Re: [DNSOP] Terminology question: split DNS
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Artyom Gavrichenkov wrote:
> On Mon, Mar 19, 2018 at 5:47 PM, Paul Hoffman <paul.hoffman@vpnc.org>; wrote:
> > [..] the basic point is that the
> >    correspondence between a given FQDN (fully qualified domain name) and a
> >    given IPv4 address is no longer universal and stable over long periods."
> 
> IP v. being whatever, 4 or 6, there's a bunch of reasons there's
> virtually no correspondence between a given FQDN and a given IP
> address nowadays. E.g. CDNs.

There are many reasons that globally inconsistent DNS RRsets exist, e.g.
load balancers, CDNs, split [horizon] DNS, etc. I think split horizon is
a specific type of global inconsistency that doesn't necessarily
encompass the other types.

-- 
Robert Edmonds