Re: [v6ops] FYI: Microsoft's latest on CLAT

Hope that Microsoft's annnoucement can be a strong incentive to promote more IPv6-only deployment in operator networks and enterprise networks globally.

Chongfeng

From: Brian E Carpenter
Date: 2024-03-09 03:28
To: Ole Troan; Lorenzo Colitti
CC: Tommy Jensen; v6ops@ietf.org
Subject: Re: [v6ops] FYI: Microsoft's latest on CLAT
On 09-Mar-24 00:14, Ole Troan wrote:
> Lorenzo,
> 
> I’m also a fan of IPv6-mostly.
> Isn’t it too early to state that it has lower operational cost than dual-stack (or IPv4 only)?
> What I mostly(sic) like about it, is that it provides a clearer path towards IPv6 only than dual stack.

If you want to get philosophical, dual stack was conceived on the assumption that people would be powerfully motivated to migrate because stuff would break due to the shortage of IPv4 addresses. This was before large-scale NAPT44 was considered viable; in that world the path was fairly clear.

I agree that in the world we now live in, -mostly is the best route for many sites, so the Microsoft announcement is welcome.

    Brian

> 
> But I would imagine at least for the short term there are going to be quite a few operational wrinkles to sort out. It’s likely harder to troubleshoot IPv4 problems too. And I don’t think it even works on my DHCPv6 single address assigned network at all (yet to be tested).
> 
> Cheers,
> Ole
> 
>> On 8 Mar 2024, at 04:52, Lorenzo Colitti <lorenzo=40google.com@dmarc.ietf.org> wrote:
>>
>> Great to hear! I think this means that all the major platforms will support the "IPv6-mostly" operational model that v6ops has been working on for the past few years. That's super important, because it means that any network can use this model with confidence that all their clients will work.
>>
>> Hopefully this will really help adoption of this model in enterprise networks. Dual-stack is expensive to operate, but if IPv6-only works, then any enterprise that wants to support IPv6 in some form can simply skip directly from IPv4-only to IPv6-mostly without having to worry about the costs of dual-stack at all.
>>
>> On Fri, Mar 8, 2024 at 5:05 AM Tommy Jensen <Jensen.Thomas=40microsoft.com@dmarc.ietf.org> wrote:
>> Good day v6ops,
>>
>> As a general IPv6 FYI, I'll share Windows' announcement to bring CLAT to general networking interfaces which went live today: https://techcommunity.microsoft.com/t5/networking-blog/windows-11-plans-to-expand-clat-support/ba-p/4078173
>>
>> Looking forward to seeing everyone in Brisbane and talking about CLAT recommendations, the draft Jen and I are coauthoring, as Windows will be an implementor!
>>
>> Thanks,
>> Tommy
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> 
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