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

Thu Apr 8 19:10:59 UTC 2010

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].

> 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.

> Also, please note that the current policies and "waste" (ahem) is only
> for 2000::/3, if that runs out we can take another 7 looks at how we
> should distribute address space without "waste".
> Indeed the folks now getting IPv6 will have an IPv4 A-class advantage,
> but heck, if 2000::/3 is full, we finally can say we properly deployed
> IPv6 straight all around to the rest of the universe...

Very good point and likely our saving grace in v6. The space is big
enough that we will get a sanity check after (possibly) burning
through the first /3 much faster than expected.

~Chris

[1] - "How much IPv6 is there?"
http://weblog.chrisgrundemann.com/index.php/2009/how-much-ipv6-is-there/

>
> Greets,
>  Jeroen
>

-- 
@ChrisGrundemann
weblog.chrisgrundemann.com
www.burningwiththebush.com
www.coisoc.org