On Fri, Feb 10, 2012 at 11:15, John C Klensin <john-ietf@xxxxxxx> wrote: > To follow up on an earlier comment, the rate at which ARIN (or > other RIRs) are running out of /10s (or /8s) is probably > irrelevant, as are hypotheses about what ARIN staff might do > about requests for allocation for CGN use with or without this > policy/ block. > > But, since people want to talk about it in those terms, I'd be > interested in some real data and projections. In particular, > how many large ISPs have expressed significant interest in this, > where "large" is defined as "big enough that an application for > a /10 would be taken seriously". Now, if one /10 block is > allocated to this use versus all of those ISPs applying for > separate ones, how much does that change the likely date at > which all of the currently-unallocated /8s are exhausted. This is not about IPv4 life-support. This is about providing the best answer to a difficult problem. Run-out date is not nearly as important as efficient use at this point. It is not efficient for multiple ISPs to use different space when a shared space will function optimally. > If that difference is less than years, I, personally, don't > think that particular argument is useful. Other arguments may > be, but not that one. Please see https://tools.ietf.org/html/draft-bdgks-arin-shared-transition-space for a more thorough analysis of the motivations, pros, cons, and alternatives for this shared CGN space. I think you'll find that those other arguments are laid out there. Cheers, ~Chris > john > > _______________________________________________ > Ietf mailing list > Ietf@xxxxxxxx > https://www.ietf.org/mailman/listinfo/ietf -- @ChrisGrundemann http://chrisgrundemann.com _______________________________________________ Ietf mailing list Ietf@xxxxxxxx https://www.ietf.org/mailman/listinfo/ietf