IPv6 Subnet tool

[Joe Abley]

On 14 Jan 2009, at 16:09, Gert Doering wrote:

> On Wed, Jan 14, 2009 at 03:55:08PM -0500, Joe Abley wrote:
>> For sure. It seems disappointing that LIRs can't just assign /48s
>> consistently, though. Perhaps I'm just not seeing the problem that
>> assigning a /56 solves.
>
> Geoff Huston's math seems to show that we'll run out of IPv6 space in
> 20-30 years if we assign /48s to every end user out there (plus have
> some inevitable loss due to aggregation hierarchy, and so on)...

I hadn't seen those numbers, thanks. I will go and hunt them down.

Last I heard the expectation from the RIRs was that LIRs should assign  
a /48 to people who need to number more than one subnet, which makes / 
56 seem like an annoying exception to the rule. I see that the ARIN  
policy manual has changed since then to specify /56es, however.  
APNIC's still says /48, as does LACNIC's and Afrinic's. I ran out of  
patience trying to find the v6 policy at RIPE.

I guess what I'm really in favour of is consistency.


Joe