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

> /28 for any ISP having several IPv4 prefixes and  committed 
> to deploy 6rd would be IMHO a good choice.
> In practice, /60s to customer sites is quite sufficient, at 
> least in the short term.

No, /60s to customer sites is not sufficient. It breaks the IPv6
model of fixed size site allocations which assumes that all sites
will have /48 assignments unless they are private residences in 
which case they will have /56 prefixes. This uniformity is essential
in order to allow people to innovate with IPv6.

We should not force 6RD ISPs into making this kind of mistake,
especially since 6RD is only a transition measure, and if an 
ISP gets /60 encoded into all their systems and processes, then
they will be stuck with it long after 6RD has disappeared.

That would be an IPv6 equivalent of the swamp, i.e. a short
sighted, short term decision with negative long term
consequences.

--Michael Dillon