Martin,

The primary reason we are proposing this approach is that it seemed to us to be 
a bit more explicit about the numbers in this space being part of an 
experiment. The added benefit here is that we are in some sense greasing the 
bits too.

spt

> On Aug 17, 2021, at 20:08, Martin Thomson <m...@lowentropy.net> wrote:
> 
> I don't think that this approach is the best we could do.
> 
> Experiments, particularly large-scale ones, turn into deployments.  
> Consequently the difference between "an experiment" and "a standard" is the 
> date at which you look.  See also RFC 6648.
> 
> In that light, why not use the entire unassigned space for experiments?  A 
> registry policy that allowed allocations for experiments, but marked those 
> entries as temporary (the word "provisional" is usual here) would suffice.  
> Reclaiming these codepoints might be more challenging than the draft makes 
> out; the expiration time you have in the draft is fine, though I expect that 
> any dates will be roundly ignored if code is still shipping.
> 
> The point of a registry is to avoid collisions and the interoperability 
> failures that follow.  So I would also add that all new allocations 
> (experiment or otherwise) should draw from the unassigned space at random, 
> rather than sequentially.  That should minimize collisions up until the point 
> where we have exhausted the space.
> 
> I would also prefer to have no space reserved for private use (though a very 
> small space is tolerable).
> 
> (It shouldn't be a surprise, but I'm advocating for the same general approach 
> that QUIC took.)
> 
> On Wed, Aug 18, 2021, at 09:34, Christopher Wood wrote:
>> Hi folks,
>> 
>> Based on discussing regarding draft-ietf-tls-hybrid-design during IETF 
>> 111, it became clear that we need some mechanism to deal with 
>> temporary, experimental codepoints for testing out new features. To 
>> that end, Sean and Joe recently published this draft:
>> 
>>   https://datatracker.ietf.org/doc/html/draft-salowey-tls-rfc8447bis-00
>> 
>> This document obsoletes RFC8447 and updates a number of other relevant 
>> documents. The main changes in this document are:
>> 
>> - Experimental codepoint policy and process 
>> (https://datatracker.ietf.org/doc/html/draft-salowey-tls-rfc8447bis-00#section-17)
>> - Updated Recommended registry values 
>> (https://datatracker.ietf.org/doc/html/draft-salowey-tls-rfc8447bis-00#section-5)
>> 
>> Please review the document, especially if you have thoughts about the 
>> experimental policy. Assuming there are no major objections, I'd like 
>> to propose that we proceed with the proposal to get things started.
>> 
>> Thanks,
>> Chris
>> 
>> _______________________________________________
>> TLS mailing list
>> TLS@ietf.org
>> https://www.ietf.org/mailman/listinfo/tls
>> 
> 
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