[arin-ppml] Policy Proposal: Predicable IPv4 Run Out by Prefix Size

Martin Hannigan martin.hannigan at batelnet.bs
Wed Jun 10 18:16:32 EDT 2009

Based on the recent discussions here I think that the language should
be modified to include reference to inventory that ARIN may hold. For
example, if someone does return a /8 and there is a need, the policy
should possibly not be in effect unless there is only "one" /8
available for allocation. I have some issues with justification time
frames as well, but interested to hear the response on the inventory



On Mon, Jun 8, 2009 at 3:10 PM, Member Services<info at arin.net> wrote:
> ARIN received the following policy proposal and is posting it to the
> Public Policy Mailing List (PPML) in accordance with Policy Development
> Process.
> This proposal is in the first stage of the Policy Development Process.
> ARIN staff will perform the Clarity and Understanding step. Staff does
> not evaluate the proposal at this time, their goal is to make sure that
> they understand the proposal and believe the community will as well.
> Staff will report their results to the ARIN Advisory Council (AC) within
> 10 days.
> The AC will review the proposal at their next regularly scheduled
> meeting (if the period before the next regularly scheduled meeting is
> less than 10 days, then the period may be extended to the subsequent
> regularly scheduled meeting). The AC will decide how to utilize the
> proposal and announce the decision to the PPML.
> In the meantime, the AC invites everyone to comment on the 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 Policy Development Process can be found at:
> https://www.arin.net/policy/pdp.html
> Mailing list subscription information can be found
> at:https://www.arin.net/mailing_lists/
> Regards,
> Member Services
> American Registry for Internet Numbers (ARIN)
> ## * ##
> 1. Policy Proposal: Predicable IPv4 Run Out by Prefix Size
> 2. Proposal Originator: David Farmer
> 3. Proposal Version: 1.0
> 4. Date: 8 June 2009
> 5. Proposal type: new
> 6. Policy term: permanent
> 7. Policy statement:
> Create a new subsection in section 4 of the NRPM;
> 4.X Maximum Allocation or Assignment during and after Run-Out
> When ARIN receives its last /8, by IANA implementing section, a
> maximum allocation and assignment size will be put into effect.  The
> maximum allocation or assignment will be the next whole CIDR prefix less
> than or equal to one quarter (1/4) of the total unrestricted IPv4
> resources available to ARIN for allocation or assignment at the time,
> but no longer than the applicable minimum allocation or assignment.  All
> other allocation and assignment rules, requirements, or procedures apply
> in addition.
> If this maximum allocation or assignment provides insufficient
> resources, additional resources may be request after a three (3) month
> waiting period.
> This section (4.x) is applicable to allocations and assignments from
> ARIN's unrestricted IPv4 resources only, and is explicitly not
> applicable to resources received through Transfers to Specified
> Recipients per section 8.3, or any other specially designated resources.
> 8. Rationale:
> This proposal is intended to insure an equitable distribution of the
> remaining unrestricted IPv4 number resources available to ARIN once such
> resources are no longer abundantly available from IANA.  Equity is
> achieved by insuring the available resources are spread among multiple
> entities and that no single entity may monopolize all of the resources
> available through a single request, at least until the maximum equals
> the minimum allocation or assignment size.
> Reducing the maximum allocation or assignment size in proportion to the
> amount of resources available should minimize, or possibly eliminate,
> the need to fulfill requests with multiple smaller blocks.
> Beyond providing predictability and order during the run out phase, this
> proposal provides an equitable means of distribution of resources if or
> when additional resources become available after ARIN has initially
> exhausted such resources.  Such as if resources are returned, recovered
> by other means, or further resources are obtained from IANA.
> Other ratios, such as one half (1/2) or one eighth (1/8) could be
> considered.  One eighth (1/8) would provide greater assurance of
> eliminating the need to use multiple blocks to fulfill requests and
> insure a greater number of entities receive resources.  However, one
> eighth (1/8) is more likely to be seen as rationing and an attempt to
> artificially extend the lifetime of IPv4.  During the ARIN XXIII policy
> discussion there seemed to be a consensus that attempts to extend the
> lifetime IPv4 resources would be undesirable.  While on the other hand,
> one half (1/2) is less likely to ration the resources, it would likely
> result in the resource being spread across significantly fewer entities
> and increase the need to use multiple blocks to fulfill requests.
> Therefore, the ratio one quarter (1/4) is proposed as a compromise
> between competing sets of goals.
> 9. Timetable for implementation:  Immediate
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