[address-policy-wg] IPv6 allocations for 6RD

> Just to drop a bit of bait into this lively discussion :-9 - 
> we could actually afford to give every organization that 
> reasonably claims to serve IP connectivity to more than 1000 
> customers a /24.  There's 10 million /24s inside FP 001.  All 
> in all, the RIRs have about 20.000 members today - 1/500th of that.

Now those are numbers that I can understand. I think everyone knows
what a /24 is, because even in IPv6 it is the same percentage of the
total number space as it is in IPv4. 

Either we accept the fact that 6RD relies on assigning
address blocks sparsely within the allocation for technical
reasons, and just give 6RD ISP's an allocation big enough
to do the job, or we write a special policy for 6RD ISPs.

There are only 2 reasons that I can see to write a special policy.
One is to encourage ISPs to assign /56 prefixes to customers,
not longer ones like /60. And the other is to restrict 6RD
allocations only to ISPs that maintain a certain amount of
density, i.e. if an ISP has lots of IPv4 allocations scattered 
all around the IPv4 number space, we might say that they cannot
have an IPv6 allocation to cover more than x number of IPv4 /8s.

But given that there is no shortage of IPv6 addresses in the
foreseeable future, I'm not yet convinced that a new policy is
needed.

--Michael Dillon