IPv6 Ignorance

Adrian Bool aid at logic.org.uk
Mon Sep 17 13:37:44 UTC 2012


On 17 Sep 2012, at 13:28, John Mitchell <mitch at illuminati.org> wrote:

> <snip>
> > Given that the first 3 bits of a public IPv6 address are always 001, giving /48 allocations to customers means that service providers will only have 2^(48-3) or 2^45 allocations of /48 to hand out > to a population of approximately 6 billion people. 2^33 is over 8 billion, so assuming a population of 2^33, there will be enough IPv6 /48 allocations to cater for 2^(45-33) or 2^12 or 4096 IPv6 > address allocations per user in the world."
> </snip>

It seems a tad unfair that the bottom 80 bits are squandered away with a utilisation rate of something closely approximating  zero; yet the upper 48 bits are assumed to have zero wastage...

Regards,

aid




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