[arin-ppml] Requesting Feedback: Draft Policy ARIN-2014-22: Removal of Minimum in Section 4.10

[Karl Brumund]

> On Jan 9, 2015, at 1:48 PM, Owen DeLong <owen at delong.com> wrote:
> 
>> 
>> On Jan 9, 2015, at 10:33 , Karl Brumund <kbrumund at dyn.com <mailto:kbrumund at dyn.com>> wrote:
>> 
>>> On Jan 8, 2015, at 5:40 PM, Heather Schiller <heather.skanks at gmail.com <mailto:heather.skanks at gmail.com>> wrote:
>>> 
>>> Happy New Year PPML!
>>> 
>>>  As one of the shepherds of this policy, it would be very helpful to hear from the community on this proposal.  Comments for or against are welcome, as are any questions.
>>> 
>> 
>> Reading 2008-5, it appears that the authors at the time expected that ISPs may relax their filter rules to allow longer than /24 routes. Given that doing so would encourage a lot more deaggregation of existing /24s, I find it unlikely that ISPs will permit longer than /24 in any appreciable number to matter.
>> Thus it seems that having a minimum of /28 for direct allocations is impractical, and that these would happen through assignments, as today.
> 
> As one of the authors of 2008-5, yes, you are (mostly) correct.
> 
> I didn’t expect ISPs to relax their filters in general, but I did expect ISPs might relax their filters for this particular designated block. I don’t see any reason that wouldn’t be possible even now as that would not encourage (or even allow) deaggregation of existing /24s.
> 
> We are talking about a relatively small block being preserved to provide minimal resources for (primarily) post-runout new entrants (or at least that was my intent at the time of writing).
> 
>> I see nothing wrong with 2014-22, but am open to hearing other comments.
> 
> I see no advantage to 2014-22. I think when this block comes into play, since it is a particular designated block, ISPs will react relatively quickly to allow longer prefixes within this space when it becomes necessary.

Given the pain of even getting some of BCP38 implemented, I am having trouble sharing Owen’s optimism that this would happen. I would like to, I really sincerely honestly would, but then again I would also like to route in a world that implemented BCP38.

…karl

> 
> Since it is only a single /10, even at /28, we’re talking about a maximum of 16,384 additional prefixes.
> 
> Owen
> 
>> 
>> …karl
>> 
>>> You may want to read this report from RIPE Labs, specifically discussing the existing policy, and tests they did on routability of small prefixes. 
>>> 
>>> https://labs.ripe.net/Members/emileaben/propagation-of-longer-than-24-ipv4-prefixes <https://labs.ripe.net/Members/emileaben/propagation-of-longer-than-24-ipv4-prefixes>
>>> 
>>> Thanks!
>>> --Heather
>>> 
>>> 
>>> ---------- Forwarded message ----------
>>> From: ARIN <info at arin.net <mailto:info at arin.net>>
>>> Date: Tue, Nov 25, 2014 at 3:35 PM
>>> Subject: [arin-ppml] Draft Policy ARIN-2014-22: Removal of Minimum in Section 4.10
>>> To: arin-ppml at arin.net <mailto:arin-ppml at arin.net>
>>> 
>>> 
>>> On 20 November 2014 the ARIN Advisory Council (AC) accepted "ARIN-prop-214 Removal of Minimum in Section 4.10" as a Draft Policy.
>>> 
>>> Draft Policy ARIN-2014-22 is below and can be found at:
>>> https://www.arin.net/policy/proposals/2014_22.html <https://www.arin.net/policy/proposals/2014_22.html>
>>> 
>>> You are encouraged to discuss the merits and your concerns of Draft
>>> Policy 2014-22 on the Public Policy Mailing List.
>>> 
>>> The AC will evaluate the discussion in order to assess the conformance
>>> of this draft policy with ARIN's Principles of Internet Number Resource
>>> Policy as stated in the PDP. Specifically, these principles are:
>>> 
>>>   * Enabling Fair and Impartial Number Resource Administration
>>>   * Technically Sound
>>>   * Supported by the Community
>>> 
>>> The ARIN Policy Development Process (PDP) can be found at:
>>> https://www.arin.net/policy/pdp.html <https://www.arin.net/policy/pdp.html>
>>> 
>>> Draft Policies and Proposals under discussion can be found at:
>>> https://www.arin.net/policy/proposals/index.html <https://www.arin.net/policy/proposals/index.html>
>>> 
>>> Regards,
>>> 
>>> Communications and Member Services
>>> American Registry for Internet Numbers (ARIN)
>>> 
>>> 
>>> ## * ##
>>> 
>>> 
>>> Draft Policy ARIN-2014-22
>>> Removal of Minimum in Section 4.10
>>> 
>>> Date: 25 November 2014
>>> 
>>> Problem Statement:
>>> 
>>> The current section 4.10 Dedicated IPv4 block to facilitate IPv6 Deployment creates an issue where a small new organization that requires an IPv4 allocation or assignment would potentially receive a block that today would be unroutable and therefore unusable for it intended purposes.
>>> 
>>> Policy statement:
>>> 
>>> Change
>>> 
>>> "This block will be subject to a minimum size allocation of /28 and a maximum size allocation of /24. ARIN should use sparse allocation when possible within that /10 block."
>>> 
>>> To
>>> 
>>> "This block will be subject to an allocation of /24. ARIN should use sparse allocation when possible within that /10 block."
>>> 
>>> Timetable for implementation: Immediate
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>> 
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