[ppml] 2005-1 status
> Nor are we supposed to be doing our best to waste IPv6 space by holding
> an unstated "/48 per location" policy when a typical location only needs
> or two /64s.
In fact you are wrong. According to RFC 3177
we are supposed to be giving a /48 unless we are absolutely
certain that the site will never ever need more than one subnet.
Therefore, if the site needs 2 subnets today, then they qualify
for a /48 with no questions asked. In fact, if they might add a
second subnet in the next 10 years, they also qualify for a
Here is a quote from RFC 3177:
4. Conservation of Address Space
The question naturally arises whether giving a /48 to every
subscriber represents a profligate waste of address space. Objective
analysis shows that this is not the case. A /48 prefix under the 001
Global Unicast Address prefix contains 45 variable bits. That is,
the number of available prefixes is 2 to the power 45 or about 35
> If an applicant came back with reasonable justification why their site
> org) needed more than a /48 total, even to the level of a /48 per
> I'm confident ARIN would go along with it. There is nothing in the
> that prohibits such if it's justified.
Justification means different things in the IPv4 world and the IPv6 world.
We need to be careful not to confuse the two.