[arin-ppml] IPv4 Depletion as an ARIN policy concern

joel jaeggli joelja at bogus.com
Tue Nov 3 00:05:55 EST 2009

Tony Hain wrote:
> Scott Leibrand wrote:
>> So I take it you consider the existing ULA's "statistical uniqueness)
>> to
>> be sufficient?  One thing I've heard a small amount of support for is
>> to
>> have RIRs register unique addresses that are intended to be used for
>> private addressing, and assign them out of a range dedicated for that
>> purpose.  I'm not sure if that's necessary, myself, but I'm open to
>> arguments from anyone who thinks so.
> For many organizations the risks associated with 'statistical' are
> unacceptable, either based on bad experiences with IPv4 mergers, or based on
> interpretation of regulatory requirements to mitigate such risks.

it's no worse than what they do with ipv4 today, along many dimensions
it's better.

> The
> original ULA-C work was tabled due to lack of PI policy, so it looked like
> an end-run around the RIR policy framework. Now that PI policy is in place
> it is time to complete that part of the story. I have resurrected the effort
> with the draft
> http://www.ietf.org/internet-drafts/draft-hain-ipv6-ulac-01.txt . 

I'm not sure that the existance of proof longer prefix assignments than
a /32 (we're happy with our /43 btw) obviates the principle objection to
ula-c namely that if there exists a lower barrier to entry on the
availability of ula-c space then there is for pi-space that the
temptation to shop for an upstream willing to route it is extremely high.

Private address space needs to be sufficiently toxic that no-one will
consider routing it... ula-l actually achieves that.

> Rather than focus on the process of managing that space, for the moment I
> just want to get the technical requirements clearly established. If ARIN (or
> any RIR) chooses not to participate in the allocation of this space, that is
> a separable policy discussion for another day. Until the ULA-C space is
> clearly allocated to IANA, that discussion can't reasonably happen.

using unique public addresses for my private application, confers the
salubrious benefit of being able to advertise and then black hole all
traffic bound for those prefixes externally which I find quite
attractive personally.

> Tony
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