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Re: [DNSOP] New Version Notification for draft-jjmb-sunset4-dns-forwarding-ipv4aas-00.txt

"Ebersman, Paul" <Paul_Ebersman@cable.comcast.com> Tue, 03 November 2015 08:41 UTC

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From: "Ebersman, Paul" <Paul_Ebersman@cable.comcast.com>
To: Alain Durand <alain.durand@icann.org>
Thread-Topic: [DNSOP] New Version Notification for draft-jjmb-sunset4-dns-forwarding-ipv4aas-00.txt
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Date: Tue, 03 Nov 2015 08:41:20 +0000
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References: <20151102074846.14431.30976.idtracker@ietfa.amsl.com> <D25D44C3.1913B8%john_brzozowski@cable.comcast.com> <D25E5E26.1916A1%john_brzozowski@cable.comcast.com> <20151103052757.DAF2D3BBB299@rock.dv.isc.org> <20151103053711.A9AF43BBB46A@rock.dv.isc.org> <D25DD742.AF98%alain.durand@icann.org>
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Cc: Brian Haberman <brian@innovationslab.net>, "dnsop@ietf.org" <dnsop@ietf.org>, Joel Jaeggli <joelja@bogus.com>, Fred Baker <fred@cisco.com>, "sunset4@ietf.org" <sunset4@ietf.org>, "Brzozowski, John" <John_Brzozowski@Cable.Comcast.com>, Terry Manderson <terry.manderson@icann.org>
Subject: Re: [DNSOP] New Version Notification for draft-jjmb-sunset4-dns-forwarding-ipv4aas-00.txt
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On 03Nov, 2015, at 5:31 PM, Alain Durand <alain.durand@icann.org> wrote:

> In the particular case of the communication between the CPE and the ISP
> DNS recursive resolver, the two parties are within the same administrative
> authority. Thus, the need to make a BCP is much lower. This can be seen
> as simply an implementation issue. In other words, there are other
> solutions that could be used, for example a translation of the DNS packets
> from IPv4 to IPv6. Such a translation may or may not be optimal, but it
> would work and, more importantly, would not break the DNS resolution and
> would have no impact on the stability of the DNS system as a whole.

Putting in a second DNS server that does nothing but forward everything just to
translate v4 to v6 does indeed have an impact on stability if you try to do it
at large scale. It impacts infrastructure costs, performance and potentlally confuses
geo-ip/cdn. It also adds complexity in debugging.

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