Re: [v6ops] The meaning of "IPv6-only" -- Re: sense of draft-vf-v6ops-ipv6-deployment

Brian E Carpenter <brian.e.carpenter@gmail.com> Tue, 30 March 2021 20:24 UTC

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To: Gabor LENCSE <lencse@hit.bme.hu>, v6ops@ietf.org
References: <6fe89c92-a7f1-baf2-6225-7c1bc397c8ee@gmail.com> <7837404c0ba34ef38567a1d74df6381c@huawei.com> <82bbfb68-4489-6987-11fd-954e8e9eccf5@gmail.com> <2EF62E53-DCB6-436D-A240-6969483A98EC@consulintel.es> <caaba643-f99c-b45c-f7fa-b3ad55e79ae5@gmail.com> <95710B27-53CB-4450-9A5D-D1E45C60D62E@consulintel.es> <cfc6d594-7dc8-1747-3598-618c2115cb05@gmail.com> <abacbd51-1f7f-77cf-2322-c8c21e2cb204@hit.bme.hu>
From: Brian E Carpenter <brian.e.carpenter@gmail.com>
Organization: University of Auckland
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Date: Wed, 31 Mar 2021 09:24:09 +1300
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Subject: Re: [v6ops] The meaning of "IPv6-only" -- Re: sense of draft-vf-v6ops-ipv6-deployment
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On 31-Mar-21 04:17, Gabor LENCSE wrote:
> I think, I can understand both of you. :-)
> 
> Perhaps the root cause of the difference of your understanding of "IPv6-only" is your "word view", I mean that:
> 
> Jordi as the first author of RFC 8585 uses the expression "IPv6-only" in the meaning of _connectivity_, as used in the terminology of RFC 8585:
> 
>    "IPv4aaS" stands for "IPv4-as-a-Service", meaning transition
>    technologies for delivering IPv4 in IPv6-only connectivity.
> 
> Alex is experimenting with systems that were get rid of IPv4 completely by removing or switching off the IPv4 protocol stack, and thus uses the term in this sense.
> 
> We can decide to use "IPv6-only" for the first one or for the second one, but it will be still only our convention. Could we perhaps create and use some more precise terms?

An "IPv6-only host" seems quite unambiguous to me, as does "IPv6-only CPE". An "IPv6-only ISP" seems like a recipe for bankruptcy, however: the only question for an ISP is *how* to provide dual stack service, surely?

Regards,
    Brian