Re: "Running out of IPv6" (Re: ARIN IP6 policy for those with legacy IP4 Space)

[Owen DeLong <owen () delong com>]

On Apr 8, 2010, at 12:10 PM, Chris Grundemann wrote:

> On Thu, Apr 8, 2010 at 12:47, Jeroen Massar <jeroen () unfix org> wrote:
> > [changing topics, so that it actually reflects the content]
> >
> > On 2010-04-08 20:33, William Herrin wrote:
> > > Yes, with suitably questionable delegations, it is possible to run out
> > > of IPv6 quickly.
>
> The bottom line (IMHO) is that IPv6 is NOT infinite and propagating
> that myth will lead to waste. That being said, the IPv6 space is MUCH
> larger than IPv4. Somewhere between 16 million and 17 billion times
> larger based on current standards by my math[1].
Agreed

> > Ever noticed that fat /13 for a certain military network in the ARIN
> > region!?
> >
> > At least those /19 are justifyiable under the HD rules (XX million
> > customers times a /48 and voila). A /13 though, very hard to justify...
>
> Not every customer needs a /48. In fact most probably don't.
Whether they need it or not, it is common allocation/assignment
practice. I agree that smaller (SOHO, for example) customers should
get a /56 by default and a /48 on request, but, this is by no means
a universal truth of current practice.

Owen