Re: [v6ops] I-D Action: draft-ietf-v6ops-nat64-experience-04.txt

Gert Doering <gert@space.net> Sat, 09 November 2013 13:25 UTC

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Date: Sat, 9 Nov 2013 14:25:53 +0100
From: Gert Doering <gert@space.net>
To: Mikael Abrahamsson <swmike@swm.pp.se>
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Subject: Re: [v6ops] I-D Action: draft-ietf-v6ops-nat64-experience-04.txt
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Hi,

On Sat, Nov 09, 2013 at 09:27:32AM +0100, Mikael Abrahamsson wrote:
> On Fri, 8 Nov 2013, Gert Doering wrote:
> 
> > If you have NAT44 and native IPv6, I can't see why you would want to add 
> > DNS64+NAT64 to the mix.
> >
> > NAT64 is good when you do *not* want IPv4 at the customer edge.
> 
> Mobile. You don't know if the client is v4 only, v6 only, or dual stack. 
> This is up to the client.

Understood, and I see your issue here - you would want to announce a 
"normal" DNS server to a dual-stack client, not a DNS64 server, and 
you can't do that because you don't know whether he's v6 only or 
dual-stack.

This is somewhat easier in other types of large-scale customer deployments, 
where you can control what the client can get - which will mostly be 
something like "NAT44+IPv6" for many subscribers for the time to come, so
adding DNS64/NAT64 really does not have much benefit here.

Gert Doering
        -- NetMaster
-- 
have you enabled IPv6 on something today...?

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