Re: [sig-policy] prop-111-v001: Request-based expansion of IPv6 default

  • To: Andy Linton <asjl at lpnz dot org>
  • Subject: Re: [sig-policy] prop-111-v001: Request-based expansion of IPv6 default allocation size
  • From: Owen DeLong <owen at delong dot com>
  • Date: Sat, 25 Jan 2014 20:39:08 -0800
  • Cc: SIG policy <sig-policy at apnic dot net>
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    • If you're going to do this, I would rather see providers given the option of choosing a size
      ranging from /28 to /32 with encouragement towards either end (/28 or /32).

      This has several advantages:

      1. It reduces bitmath requirements.
      2. It simplifies DNS delegation for ip6.arpa zones
      3. It allows providers that simply don't need a larger allocation to choose the
      size that best meets their needs.
      4. It simplifies APNIC's resource management process.
      5. It simplifies the request process and qualification requirements.

      Owen

      On Jan 25, 2014, at 17:22 , Andy Linton <asjl at lpnz dot org> wrote:

      Dear SIG members

      The proposal "prop-111-v001: Request-based expansion of IPv6 default
      allocation size" has been sent to the Policy SIG for review. It will be
      presented at the Policy SIG at APNIC 37 in Petaling Jaya, Malaysia, on
      Thursday, 27 February 2014.

      We invite you to review and comment on the proposal on the mailing list
      before the meeting.

      The comment period on the mailing list before an APNIC meeting is an
      important part of the policy development process. We encourage you to
      express your views on the proposal:

           - Do you support or oppose this proposal?
           - Does this proposal solve a problem you are experiencing? If so,
             tell the community about your situation.
           - Do you see any disadvantages in this proposal?
           - Is there anything in the proposal that is not clear?
           - What changes could be made to this proposal to make it more
             effective?


      Information about this policy proposals is available from:


      Andy, Masato

      ----------------------------------------------------------------------
      prop-111-v001: Request-based expansion of IPv6 default allocation size
      ----------------------------------------------------------------------

      Author:       Tomohiro Fujisaki
                    fujisaki at syce dot net


      1. Problem statement
      --------------------

         Currently, IPv6 minimum allocation size to LIRs is defined as /32 in
         the "IPv6 address allocation and assignment policy", while APNIC
         currently reserves up to /29 for each /32 allocation. It's better to
         expand this minimum allocation size up to /29 since:

         - For traffic control purpose, some LIRs announce address blocks
           longer than /32 (e.g. /35). However, some ISPs set filters to block
           address size longer than /32. If LIRs have multiple /32, they can
           announce these blocks and its reachability will be better than
           longer prefix.

         - If an LIR needs address blocks larger than /32, LIRs may tend to
           announce as a single prefix if a /29 is allocated initially at
           once. i.e., total number of announced prefixes in case 1 may be
           smaller than in case 2.

           case 1:
           The LIR obtains /29 at the beginning of IPv6 network construction.

           case 2:
           The LIR obtains /32, and /31, /30 additionally with the subsequent
           allocation mechanism.

         - Before sparse allocation mechanism implemented in late 2008, /29
           was reserved for all /32 holders by sequence allocation mechanism
           in the early years. It is possible to use these reserved
           blocks efficiently with this modification.


      2. Objective of policy change
      -----------------------------

         This proposal modifies the eligibility for an organization to receive
         an initial IPv6 allocation up to a /29 by request basis.


      3. Situation in other regions
      -----------------------------

         RIPE-NCC:
         The policy "Extension of IPv6 /32 to /29 on a per-allocation vs
         per-LIR basis" is adopted in RIPE-NCC and LIRs in RIPE region can get
         up to /29 by default.


      4. Proposed policy solution
      ----------------------------

         - Change the text to "5.2.2 Minimum initial allocation size" of
           current policy document as below:

           Organizations that meet the initial allocation criteria are
           eligible to receive an initial allocation of /32. For allocations
           up to /29 no additional documentation is necessary.

         - Add following text in the policy document:

           for Existing IPv6 address space holders

           LIRs that hold one or more IPv6 allocations are able to request
           extension of each of these allocations up to a /29 without meeting
           the utilization rate for subsequent allocation and providing
           further documentation.


      5. Explain the advantages of the proposal
      -----------------------------------------

         - It will be possible for LIRs to control traffic easier.
         - It is possible to use current reserved blocks efficiently.


      6. Explain the disadvantages of the proposal
      --------------------------------------------

         Some people may argue this will lead to inefficient utilization of
         IPv6 space. However, the space up to /29 is reserved by APNIC
         secretariat for each /32 allocation.


      7. Impact on resource holders
      -----------------------------
         NIRs must implement this policy if it is implemented by APNIC.