[arin-ppml] Lower End User IPv4 threshold to /24

Member Services info at arin.net
Mon Aug 3 16:37:15 EDT 2009

ARIN received the following policy proposal and is posting it to the
Public Policy Mailing List (PPML) in accordance with Policy Development

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:

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


Member Services
American Registry for Internet Numbers (ARIN)

## * ##

Owen DeLong wrote:
> 1.      Policy Proposal Name: /24 End User Minimum Allocation Unit
> 2.      Proposal Originator: Owen DeLong
> 3.      Proposal Version: 0.9
> 4.      Date: 8/3/09
> 5.      Proposal type: new
> 6.      Policy term: permanent
> 7.      Policy statement:
> Replace section of the NRPM with the following:
> Multihomed Connection
> For end-users who demonstrate an intent to announce the requested space in a
> multihomed fashion to two or more distinct providers, the minimum block of IP
> address space assigned is a /24. If assignments smaller than a /24 are needed,
> multihomed end-users should contact their upstream providers. When prefixes are
> assigned which are longer than /20, they will be from a block reserved for that
> purpose so long as that is feasible. End-users may not receive a block 
> smaller
> than /22 under this policy if they already have resources from ARIN, 
> except as
> specified in section
> Renumber the existing paragraph under the 4.3.6 to 
> Utilization requirements for additional Assignment
> Add the following paragraph
> Replacement assignments for small multi-homers
> Any end-user that possesses an assignment smaller than /22 under any 
> part of
> section 4.3 shall not be able to get an additional assignment unless 
> they agree
> to return all existing assignments within 12 months of receiving a new 
> assignment.
> The new assignment shall be sized to accommodate their existing 
> utilization in
> addition to their justified additional growth space under section
> The common cases for this are expected to be a /24 returned after 
> receipt of a /23,
> or a /23 returned after receipt of a /22.
> 8.      Rationale:
> This policy attempts to incorporate the recent and historical discussions of
> policy for multi-home users on PPML. The intent is to provide as fair a process
> as possible for multi-homed organizations down to the smallest feasible size
> while still preserving some control over growth in the routing table.
> It has been repeatedly noted that /24 multi-homers exist today with PA space
> and still occupy a routing table slot, so, it is unlikely that moving this
> boundary to /24 would significantly impact the routing table.
> By requiring smaller assignments to renumber and return, rather than add more
> small blocks to their assignments, this policy seeks to further reduce the
> chances of unnecessary growth in the routing table and encourage good aggregation
> where possible.
> 9.      Timetable for implementation: Immediate
> ------------------------------------------------------------------------
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