I agree generally with Brian except for the 2860 part. I would not want
to have seen IANA put on the spot for this, even if the IAB had been
willing to take responsibility for it.

Meanwhile I will say once again that capitulating here is wrong on many
levels. First there is the whole, "They made their non-IPv6 bed, they
ought to be required to lay down in it" issue. But completely aside from
that, I think Brian is right that the chances are within a close
approximation of 100% that whatever we do here will be ignored anyway.
So why not take a stand by doing the right thing and not allocating the
prefix?

... and a meta-issue for Ron. I saw a lot more opposition to the
document in the last call than you did. Are you by any chance referring
to my message at
https://www.ietf.org/mail-archive/web/ietf/current/msg69583.html below?
If so, I guess I needed to actually say the words, "I oppose publication
of this document?" If I wasn't clear, sorry.


Doug


On 11/28/2011 18:43, Brian E Carpenter wrote:
> I refrained from commenting during the IETF Last Call, and I think it might
> help the IESG to reach the least bad decision if I say why.
> 
> This whole proposal will *never* be palatable to me. However, it may be
> reasonable for the IETF to lay down appropriate restrictions, even though
> we know that ISPs will ignore them.
> 
> IMNSHO it would have been much better if the IAB had agreed that this
> allocation was a policy matter to be left to IANA and the RIRs under
> Clause 4.3 of RFC 2860 . Since the IAB chose to define it as a technical
> allocation, it is the IETF that has to take responsibility, and it is a
> lose-lose game for us. Whatever we decide is wrong.
> 
> Regards
>    Brian Carpenter
> 
> On 2011-11-29 10:25, Ronald Bonica wrote:
>> On October 10, 2011, the IESG issued a last call for comments regarding 
>> draft-weil-shared-transition-space-request-09 (IANA Reserved IPv4 Prefix for 
>> Shared CGN Space). While the community did not display consensus supporting 
>> the draft, it also did not display consensus against the draft. Therefore, I 
>> will submit the draft to the full IESG for its consideration at its December 
>> 1 teleconference. The draft will be published as a BCP if a sufficient 
>> number of IESG members ballot "Yes" or "No Objection", and if no IESG member 
>> ballots "Discuss".
>>
>> Because the decision to submit this draft to the full IESG is controversial, 
>> I will explain the decision making process.
>>
>> The IETF has a precedent for interpreting silence as consent. Typically, if 
>> a last call elicits no response, the draft is brought to the full IESG for 
>> consideration. The October 10 last call regarding 
>> draft-weil-shared-transition-space-request-09 evoked only two responses. One 
>> response supported publication of the draft while the other was opposed to 
>> it. The respondent voicing support for the draft offered no rationale. The 
>> respondent objecting offered many editorial comments, but almost no 
>> rationale for blocking the draft once the editorial comments are addressed.
>>
>> Because the October 10 last call elicited so little response, and because 
>> many community members have privately expressed strong opinions regarding 
>> this draft, I will summarize outstanding issues below. The following are 
>> arguments *against* draft-weil-shared-transition-space-request:
>>
>> - Allocation of a special-use /10 does not hasten the deployment of IPv6. It 
>> only extends the life of the IPv4 network.
>> - If a special-use /10 is allocated, it will be used as additional RFC 1918 
>> address space, despite a specific prohibition against such use stated by the 
>> draft.
>> - If a special-use /10 is allocated, it will encourage others to request 
>> still more special-use address space.
>> - Some applications will break. These applications share the characteristic 
>> of assuming that an interface is globally reachable if it is numbered by an 
>> non-RFC 1918 address. To date, the only application that has been identified 
>> as breaking is 6to4, but others may be identified in the future.
>>
>> Arguments *supporting* draft-weil-shared-transition-space-request-09 assume 
>> that operators will deploy CGNs and will number the interfaces between CGN 
>> and CPE. If the /10 proposed by draft-weil-shared-transition-space-request 
>> is not allocated, operators will number from one of the following:
>>
>> - public address space 
>> - RFC 1918 address space
>> - squat space
>>
>> If operators number from public address space, they will deplete an already 
>> scarce resource. If operators number from RFC 1918 space and the same RFC 
>> 1918 space is used on the customer premise, some CPE will behave badly. The 
>> consequences of numbering from squat space are determined by the squat space 
>> that is chosen.
>>
>> In summary, allocation of the /10 will have certain adverse effects upon the 
>> community. However, failure to allocate the /10 will have different adverse 
>> effects on the community. The IESG is being asked to choose the lesser of 
>> two evils.


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