Hi, On Sat, Nov 05, 2011 at 03:37:09AM +0100, Daniel Roesen wrote:
Raising the HD-ratio so much (from 0.8 to 0.94) was a clear mistake in my opinion. Even if you have every(!) german citizen as customer, you would never qualify for more than a /28. That's ridiculous.
Indeed it is, as your statement is missing one important bit to be useful - the size of the prefix you intend to give your customers. If you give out /64s, you have 4 billion of those in a /32, so you don't need more to number roughly 80 million customers. If you give out /56s, indeed, ripe-523/appendix A shows that you qualify for a /28 - which contains 268 million /56s, so whether this is sufficient or not depends on the internal network structure, and it might be a bit tight if you have multiple levels of aggregation, yes. If you hand out /48s to your customers, (roughly) 80 million customers would be counted as 256*80 million = 20 billion /56s - and appendix A permits allocation of a /19 in that case.
The 128 bit IPv6 addr width had the promise to provide enough bits for internal hierarchy for "nice" (read: cheap to manage, easy to deal with in general and specifically operations) addressing plans. For large/mid-scale residential ISPs of certain topologies and access infrastructures, the current "ruleset" of "consider only 2-3yrs plans for initial alloc" in combination with HD-ratio 0.94 requirement for getting more bits, is a real problem. We're back to slice-and-dice-on-demand - no proper hierarchical structure anymore. Otherwise, HD-ratio 0.94 WILL bite sooner or later.
I think I mentioned this a few times before: if you think the HD ratio is using the wrong number, or if you think the HD formula is completely wrong to start with, please submit a policy proposal to change this to whatever you think would work better. But this is somewhat out of scope for the discussion of 2011-04 and should not be discussed in *this* thread. Gert Doering -- APWG chair -- have you enabled IPv6 on something today...? SpaceNet AG Vorstand: Sebastian v. Bomhard Joseph-Dollinger-Bogen 14 Aufsichtsratsvors.: A. Grundner-Culemann D-80807 Muenchen HRB: 136055 (AG Muenchen) Tel: +49 (89) 32356-444 USt-IdNr.: DE813185279