[ppml] Policy Proposal: IPv6 Assignment Guidelines

[Scott Leibrand]

As expressed by others, I oppose this policy proposal as written, 
because I believe current guidelines are sufficient.  ISPs should be 
free to delegate a /48 or /56 to users, as appropriate for their 
situation.  I believe that any justification, including convenience, 
should be sufficient to allow allocation of a /48 instead of a smaller 
subnet.

-Scott

Member Services wrote:
> ARIN received the following policy proposal. In accordance with the ARIN
> Internet Resource Policy Evaluation Process, the proposal is being
> posted to the ARIN Public Policy Mailing List (PPML) and being placed on
> ARIN's website.
>
> The ARIN Advisory Council (AC) will review this proposal at their next
> regularly scheduled meeting. The AC may decide to:
>
>    1. Accept the proposal as a formal policy proposal as written. If the
> AC accepts the proposal, it will be posted as a formal policy proposal
> to PPML and it will be presented at a Public Policy Meeting.
>
>    2. Postpone their decision regarding the proposal until the next
> regularly scheduled AC meeting in order to work with the author. The AC
> will work with the author to clarify, combine or divide the proposal. At
> their following meeting the AC will accept or not accept the proposal.
>
>    3. Not accept the proposal. If the AC does not accept the proposal,
> the AC will explain their decision. If a proposal is not accepted, then
> the author may elect to use the petition process to advance their
> proposal. If the author elects not to petition or the  petition fails,
> then the proposal will be closed.
>
> The AC will assign shepherds in the near future. ARIN will provide the
> names of the shepherds to the community via the PPML.
>
> In the meantime, the AC invites everyone to comment on this proposal on
> the PPML, particularly their support or non-support and the reasoning
> behind their opinion. Such participation contributes to a thorough
> vetting and provides important guidance to the AC in their deliberations.
>
> The ARIN Internet Resource Policy Evaluation Process can be found at:
> http://www.arin.net/policy/irpep.html
>
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> Regards,
>
> Member Services
> American Registry for Internet Numbers (ARIN)
>
>
> ## * ##
>
>
> Policy Proposal Name: IPv6 Assignment Guidelines
>
> Author: Leo Bicknell
>
> Proposal Version: 1.0
>
> Submission Date: 8/17/2007
>
> Proposal type: new
>
> Policy term: permanent
>
> Policy statement:
>
> Replace the text in section 6.5.4.1 with the following text:
>
> LIR's may assign blocks in the range of /48 to /64 to end sites.
> All assignments made by LIR's should meet a minimum HD-Ratio of .25.
>
> * /64 - Site needing only a single subnet.
> * /60 - Site with 2-3 subnets initially.
> * /56 - Site with 4-7 subnets initially.
> * /52 - Site with 8-15 subnets initially.
> * /48 - Site with 16+ subnets initially.
>
> For end sites to whom reverse DNS will be delegated, the LIR/ISP should
> consider making an assignment on a nibble (4-bit) boundary to simplify
> reverse lookup delegation.
>
> LIR's do not need to issue all 5 sizes of prefixes as long as the
> HD-Ratio requirement is met.
>
> Rationale:
>
> The existing section 6.5.4.1 does not provide clear guidance on how
> large of a prefix to allocate to a site.  This makes it difficult for
> LIR's to know they are in compliance with the rules, and makes it harder
> for ARIN staff to evaluate requests per the communities wishes.
>
> This policy is based on an HD Ratio of .25 for end sites.  The following
> table may be useful:
>
> Prefix Size    Number of Subnets     Required in Use to Meet .25
> -----------    -----------------     ---------------------------
> /64            1                     1
> /60            16                    2
> /56            256                   4
> /52            4096                  8
> /48            65536                 16
>
> It is believed this policy provides clear guidance while allowing LIR's
> to make generous allocations to their end-sites.
>
> Timetable for implementation: immediate for new requests, 2 year grace
> period for all existing assignments.
>
>
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