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Re: [v6ops] Eric Rescorla's No Objection on draft-ietf-v6ops-rfc6555bis-05: (with COMMENT)

Lorenzo Colitti <lorenzo@google.com> Sat, 21 October 2017 04:08 UTC

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From: Lorenzo Colitti <lorenzo@google.com>
Date: Sat, 21 Oct 2017 13:08:05 +0900
Message-ID: <CAKD1Yr0Ce=Y+acGC4muPFbGVMy_J+BJEsaac3aNmG2B_xoCSUg@mail.gmail.com>
To: Eric Rescorla <ekr@rtfm.com>
Cc: Cameron Byrne <cb.list6@gmail.com>, "v6ops@ietf.org WG" <v6ops@ietf.org>, v6ops-chairs@ietf.org, The IESG <iesg@ietf.org>, draft-ietf-v6ops-rfc6555bis@ietf.org
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Subject: Re: [v6ops] Eric Rescorla's No Objection on draft-ietf-v6ops-rfc6555bis-05: (with COMMENT)
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On Sat, Oct 21, 2017 at 12:36 PM, Eric Rescorla <ekr@rtfm.com> wrote:

> That's reasonable, I suppose, but (a) not everyone is on mobile and (b)
>> the endpoint's interests may not align with yours.
>>
>>
>> Those factors are in no way specific to mobile networks.
>> IPv4 addresses and NATs cost money for everyone. Stateless translation
>> doesn't use NAT, but because it's stateless, port space has to be assigned
>> in advance, so it consumes more IPv4 space than stateful translation.
>> Public IPv4 to users is already infeasible for new entrants, and will be
>> infeasible in the sort to medium term incumbents.
>>
>> I don't see any cheaper alternative than IPv6. Do you?
>>
>
> As I said, the endpoints have different incentives, namely to get the best
> performance for their users.
>
> If IPv4 and IPv6 paths are equally fast for the user, then delaying
> attempts to connect v4 in cases where v4 resolves first makes the user's
> experience slower.
>

Sure, but my question was about cost. Perhaps we agree that in the long
term IPv6 is cheaper, even if we don't agree that it's better.

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