[address-policy-wg] 2011-04 New Policy Proposal (Extension of the Minimum Size for IPv6 Initial Allocation)

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...?

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