IPv6 PI allocation

[Iljitsch van Beijnum]

On 18-mei-2007, at 13:53, Nick Hilliard wrote:

> I really don't think that we need to learn the classful-addressing- 
> is-evil lesson again.

Sorry to be using up so much bandwidth...

But: IPv6 used to be completely classless. Until RFC 3513 (well, it's  
predecessor, really) came along:

    For all unicast addresses, except those that start with binary value
    000, Interface IDs are required to be 64 bits long

I have no idea why this is in there, it doesn't seem to serve any  
purpose and most operators are happy to break this requirement if  
they feel the need.