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Re: I-D Action: draft-ietf-6man-ipv6only-flag-03.txt

Brian E Carpenter <brian.e.carpenter@gmail.com> Sat, 20 October 2018 01:44 UTC

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Subject: Re: I-D Action: draft-ietf-6man-ipv6only-flag-03.txt
To: Ole Troan <otroan@employees.org>, Job Snijders <job@ntt.net>
Cc: 6man WG <ipv6@ietf.org>
References: <153973137181.9473.10666616544238076833@ietfa.amsl.com> <092346e1-6350-e54e-e711-9c5ee6dc4e6b@gmail.com> <CAFU7BASO_ByzbanhLKnWV280O_fASd-8W+ujpj3sN6d2-whw2w@mail.gmail.com> <CACWOCC-u7aAPwAOcixYvt2On=-o_8X25GhqdXTfA+tWRC1o2XA@mail.gmail.com> <alpine.DEB.2.20.1810191534430.26856@uplift.swm.pp.se> <CACWOCC-ZCqUZv2Wq8m=9dBYaxkjjRRZvejhcZ9vF3gnyPX4-mw@mail.gmail.com> <C05CCBF7-CBD4-44EA-8F4F-A79685BD84D1@employees.org>
From: Brian E Carpenter <brian.e.carpenter@gmail.com>
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Date: Sat, 20 Oct 2018 14:43:53 +1300
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On 2018-10-20 09:25, Ole Troan wrote:
> Job et al,
> 
>> I’m suggesting that two or three operating systems do something with the flag. Demonstrate how the flag can be used and observe if there are any gotchas. 
>>
>> If running code isn’t possible, I don’t think the document needs to be published at all.
> 
> Asking for implementations also comes with responsibility.
> There will be much larger resistance to change after implementations are written.
> Even if a feature is implemented as an experiment, it is out in the wild, and you have to consider interoperability and backwards compatibilty.
> And we need to listen to implementors, both with regards to changes required based on implementation experience and not to make changes, because it affects implementations written.
> 
> I hope we can’t screw this up to badly with a single bit though.

Not on the router side. But on the host side, the way it's used
is essentially a heuristic, so there are screw-up opportunities.

   Brian
> 
> Ole
> 
> 
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