Addressing plan exercise for our IPv6 course

Matthew Walster matthew at
Thu Jul 29 10:00:40 CDT 2010

On 29 July 2010 15:49, Owen DeLong <owen at> wrote:
> If we give every household on the planet a /48 (approximately 3 billion
> /48s), we consume less than 1/8192 of 2000::/3.

There are 65,536 /48s in a /32. It's not about how available 2000::/3
is, it's hassle to keep requesting additional PA space. Some ISPs
literally have millions of customers.

All I'm saying is, why waste the space when they're only going to need
1 subnet? If they want more than one subnet, give them a /48,/56,/60
or whatever, as requested.


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