Re: [v6ops] draft-palet-v6ops-nat64-deployment-02 comments

Brian E Carpenter <brian.e.carpenter@gmail.com> Mon, 16 July 2018 12:03 UTC

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To: Fred Baker <fredbaker.ietf@gmail.com>, xiechf.bri@chinatelecom.cn
Cc: "nick.heatley@bt.com" <nick.heatley@bt.com>, v6ops <v6ops@ietf.org>, KOSSUT Tomasz O-PL <tomasz.kossut@orange.com>, "Rajiv Asati (rajiva)" <rajiva=40cisco.com@dmarc.ietf.org>
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From: Brian E Carpenter <brian.e.carpenter@gmail.com>
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Date: Tue, 17 Jul 2018 00:02:59 +1200
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Subject: Re: [v6ops] draft-palet-v6ops-nat64-deployment-02 comments
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Fred,

On 16/07/2018 23:47, Fred Baker wrote:
> 
> 
>> On Jul 15, 2018, at 9:52 PM, xiechf.bri@chinatelecom.cn wrote:
>>
>> One of the debate about NAT64 is that it will slow down the transition process of IPv6, for it allow the existance of IPv4, especially in the content side, the OTT, especially smaller ones,  will have less incentive to move to IPv6. I do not mean that this point is right,  but this draft should give some explanation or clarification to this issue.
> 
> To my way of thinking, which may or may not be correct, that can be argued either way. The existence of stateless and stateful translation has enabled 464XLAT to be used to make some networks IPv6-only (the CLAT being stateless and the PLAT being stateful) although the entire world has not switched. I would expect that few would even consider turning IPv4 off without some means of accessing IPv4-hosted content. So the existence of translation hasn't slowed that rush; it has enabled it. On the other hand, if IPv4-hosted content is still accessible, there is also no pressure to make it IPv6-accessible.

That's true, but it applies regardless of whether the client accesses the
IPv4 content via a dual stack ISP or a NAT64 solution. The only way to
force a content provider to use IPv6 is by removing its IPv4 clients.
I don't think many consumer ISPs are going to do that.

So what we need is for IPv4 to be slower and less functional than IPv6,
which we can only reasonably arrange by making IPv6 better...

    Brian