[ipv6-wg] Allocating a /16 to a large enterprise ?

Hi,

On Mon, Dec 11, 2023 at 07:49:37AM +0000, Eric Vyncke (evyncke) via ipv6-wg wrote:
> [This is about ARIN, but curious to see if anybody has any insight...]
> 
> A colleague of mine showed me https://whois.arin.net/rest/net/NET6-2630-2, i.e., a /16 allocated by ARIN to Capital One (AFAIK a US bank).
> 
> Of course, this may be a tool bug, or a human encoding mistake, else I will start to fear an IPv6 addresses exhaustion in the future (only 2**13 of /16 out of 2000::/3).
> 
> If anyone has any insight, then I will welcome this insight in this specific case.

I have done maths, and the result is impressive - like, 1+ billion 
/48 end-sites (assuming less-than optimal utilization)...

I do not have any backgrounds beyond "ARIN does nibble boundaries", so
if the network in question managed to argue for a /19, they would receive
a /16 instead - which I find questionable.  Nibbles are nice for ease of
handling in the 32-28-24 range, but "beyond 24", maybe they are note exactly
good stewardship.

Still, a /19 would require a huge network, 100+ million /48 end-sites, and
for a "financial market" company, there must be something we can't see for
it to make sense...  (and no, "get lots of IP addresses because they might
turn out to be valuable assets" does not make sense either).

Gert Doering
        -- NetMaster
-- 
have you enabled IPv6 on something today...?

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