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Re: [BEHAVE] [Technical Errata Reported] RFC6052 (5547)

Fred Baker <fredbaker.ietf@gmail.com> Tue, 06 November 2018 13:52 UTC

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From: Fred Baker <fredbaker.ietf@gmail.com>
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Date: Tue, 06 Nov 2018 20:52:28 +0700
In-Reply-To: <75370789-566F-4187-8374-719E40D59D31@consulintel.es>
Cc: Christian Huitema <huitema@huitema.net>, Congxiao Bao <congxiao@cernet.edu.cn>, mohamed.boucadair@orange-ftgroup.com, Dave Thaler <dthaler@microsoft.com>, Xing Li <xing@cernet.edu.cn>, spencerdawkins.ietf@gmail.com, dwing@cisco.com, huitema@microsoft.com, "Mirja Kuehlewind (IETF)" <ietf@kuehlewind.net>, behave@ietf.org, RFC Errata System <rfc-editor@rfc-editor.org>
To: JORDI PALET MARTINEZ <jordi.palet@consulintel.es>
References: <20181106085323.07C1BB80008@rfc-editor.org> <27516408-05B3-4C08-B40E-B01E44525AB5@gmail.com> <5a5d6ac6-2d9a-96ee-118d-3601e47804cc@huitema.net> <0F8964C5-7C2F-4C90-854A-D1ADF02D7C08@gmail.com> <75370789-566F-4187-8374-719E40D59D31@consulintel.es>
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Subject: Re: [BEHAVE] [Technical Errata Reported] RFC6052 (5547)
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> On Nov 6, 2018, at 7:16 PM, JORDI PALET MARTINEZ <jordi.palet@consulintel.es> wrote:
> 
> The advantage I see with a WKP is that you can roam to another NAT64 (and/or DNS64) without changing configs, and also, that you may ignore the prefix discovery mechanism (I've seen this coded in some places), if you presume that the WKP is the "default" one ...

That, of course, is exactly the problem with RFC 7050. If you are using the preferred resolver, you get one prefix, and if you're using 8.8.8.8 (as many do), you get another. A Well Known Prefix is a great way to pick the wrong one, or one that doesn't exist.
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