Re: IPv6 end user addressing

[Joel Jaeggli <joelja () bogus com>]

On Aug 7, 2011, at 3:09 PM, Jonathon Exley wrote:

> This has probably been said before, but it makes me uncomfortable to think of everybody in the world being given /48 
> subnets by default.
> All of a sudden that wide expanse of 2^128 IP addresses shrinks to 2^48 sites. Sure that's still 65535 times more 
> than 2^32 IPv4 addresses, but wouldn't it be wise to apply some conservatism now to allow the IPv6 address space to 
> last for many more years? 

2000::/3 is 1/8th of the address range. There are other things worth conserving  not just /48s like the ability 
aggregate your whole assignment. 3.5 * 10^13 is a lot of /48s, but it's likely not enough so we'll get to crack the 
seal on 4000::/3 eventually and so on.

> After all, there are only 4 bits of IP version field so the basic packet format won't last forever.
>
> Jonathon 
>
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