[address-policy-wg] Re: [policy-announce] 2006-02 New Policy Proposal (IPv6 Address Allocation and Assignment Policy)

> /64 was for stateless autoconfig (EUI-64).
> /48 was to make it easier for folks to move between ISPs.  Since all 
> allocations to end sites would be the same size, all that would need 
> to change would be the upper 48 bits.

In particular, this means that moving between
ISPs does not require you to change your internal
network topology. Since topology changes can
involve a lot of equipment purchase and rewiring,
this levels the competitive field for IPv6 access
services. You can design your network with the 
future in mind and then grow into your topology.
That is not possible in today's IPv4 world where
everybody is concerned with not wasting addresses.

--Michael Dillon