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

GangChen <phdgang@gmail.com> Tue, 12 November 2013 14:35 UTC

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References: <97EB7536A2B2C549846804BBF3FD47E1237E18A6@xmb-aln-x02.cisco.com> <alpine.DEB.2.02.1311050329470.26054@uplift.swm.pp.se> <97EB7536A2B2C549846804BBF3FD47E1237E1941@xmb-aln-x02.cisco.com> <CAM+vMES=xhq7VF8SvqEZEz3ZCRN8p1zWiabkNnU6ucKVya6KQQ@mail.gmail.com> <6536E263028723489CCD5B6821D4B21303A137B3@UK30S005EXS06.EEAD.EEINT.CO.UK> <20131108172730.GM81676@Space.Net> <alpine.DEB.2.02.1311090926500.26054@uplift.swm.pp.se> <20131109132552.GQ81676@Space.Net> <6536E263028723489CCD5B6821D4B21303A157F2@UK30S005EXS06.EEAD.EEINT.CO.UK> <CAM+vMET6mqVQOm4GVnfkvNEGYuVSvTBVnrPOgFvj86Kmx8rnfw@mail.gmail.com> <20131111145452.GF81676@Space.Net>
Date: Tue, 12 Nov 2013 22:35:45 +0800
Message-ID: <CAM+vMER5gwBbsEwJJFkTV7LbEg0MQGpzx3ZiGaQUFUAJ6NSBVQ@mail.gmail.com>
From: GangChen <phdgang@gmail.com>
To: Gert Doering <gert@space.net>
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Cc: "v6ops@ietf.org" <v6ops@ietf.org>
Subject: Re: [v6ops] I-D Action: draft-ietf-v6ops-nat64-experience-04.txt
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2013/11/11, Gert Doering <gert@space.net>:
> Hi,
>
> On Mon, Nov 11, 2013 at 10:46:42PM +0800, GangChen wrote:
>> It doesn't expect that dual-stack UEs go to NAT64, because IPv4 native
>> connections are preferred over  IPv6+NAT64
>
> How does the UE know that a target can be reached by native IPv4 if
> DNS64 tells it "there is IPv6 for you" and IPv6 is preferred to IPv4?

UE may not can determine the existence of IPv4 native connections.
However, an network side may could serve the right DNS address
according to the UE connection status, for example the solution
described at http://tools.ietf.org/html/draft-wing-dhc-dns-reconfigure-00

Gang

> Gert Doering
>         -- NetMaster
> --
> have you enabled IPv6 on something today...?
>
> SpaceNet AG                        Vorstand: Sebastian v. Bomhard
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