[arin-ppml] Draft Policy ARIN-2023-2: /26 initial IPv4 allocation for IXPs

Scott Leibrand scottleibrand at gmail.com
Tue Jun 20 18:40:42 EDT 2023

As an IXP participant, +1 to continuing to allocate IXPs /24s upon request whenever doing so will mean IXP participants don’t have to subsequently renumber. But for IXPs with no credible plans to need a /24, no objections to allocating a smaller block by default. 


> On Jun 20, 2023, at 3:05 PM, William Herrin <bill at herrin.us> wrote:
> On Tue, Jun 20, 2023 at 8:54 AM ARIN <info at arin.net> wrote:
>> ARIN will make IPv4 micro-allocations to critical infrastructure providers of the Internet, including public internet exchange points (IXPs), core DNS service providers (e.g. ICANN-sanctioned root and ccTLD operators) as well as the RIRs and IANA. These allocations will be no smaller than a /26 for IXPs, or a /24 for other allocations that require global reachability of the assigned allocation. Multiple allocations may be granted in certain situations.
> I generally agree with this, although I'd make the minimum /27.
> There's no need to assign a /24 to something that neither requires
> that many IP addresses nor requires global routability, and there are
> private interconnects with a small number of participants that would
> benefit from addresses guaranteed to be unique. However...
>> An IXP requesting an allocation larger than a /26 must show an immediate need to utilize more than 25% of the requested allocation size upon initial commissioning.
> I vehemently disagree with this. Expecting to -eventually- have more
> than 126 participants should be more than adequate to justify a /24
> for an IXP. IPv4 addresses are not so unobtainable that we need to
> force IXPs into a regime where they have  a messy addressing problem,
> possible renumbering and flag days on the exchange.
> Regards,
> Bill Herrin
> -- 
> William Herrin
> bill at herrin.us
> https://bill.herrin.us/
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