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

Owen DeLong owen at delong.com
Thu Apr 8 15:54:38 CDT 2010


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

> On Thu, Apr 8, 2010 at 12:47, Jeroen Massar <jeroen at 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





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