ARIN-PPML Message

[ppml] Policy Proposal: IPv6 Assignment Guidelines - version 3

The author submitted a revised version of their proposal.

Regards,

Member Services
American Registry for Internet Numbers (ARIN)


## * ##


Policy Proposal Name: IPv6 Assignment Guidelines

Author: Leo Bicknell and Ed Lewis

Proposal Version: 3.0

Submission Date: 8/23/2007

Proposal type: new

Policy term: permanent

Policy statement:

Delete the text in 6.5.4.2 and Replace the text in section 6.5.4.1
with the following text:

Assignments by LIRs /48 or smaller will not be reviewed by ARIN.
Assignments greater than /48 will be reviewed to see if the additional
space is warranted according to the 0.94 HD ratio policy.  If the
space is not warranted, ARIN will consider the excess space to be
available for a different assignment, lowering the overall utilization
score of the LIR.

Rationale:

The existing section 6.5.4.1 does not provide clear guidance on how
ARIN should treat prefixes allocated to a site should an ISP come
back for additional space in the future.  This makes it difficult
for LIR's to know if they are allocating in accordance with the
rules under which they will be judged in the future.  The existing
section also provides no guidence on what the LIR or ARIN should
do in the case a larger prefix is necessary.

Timetable for implementation: immediate




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
> 
> Mailing list subscription information can be found at:
> http://www.arin.net/mailing_lists/
> 
> 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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