[ppml] [address-policy-wg] Those pesky ULAs again

Shane Kerr wrote:

[...]
> 
> If you insist on ULA central, my preferred implementation is a web
> page where you click on a button that says "give me a ULA prefix" and
> it allocates a random prefix that is not in use, and prints it on the
> screen. The only implementation question I'm not sure about is whether
> the list of allocated prefixes would be public or not; I lean towards
> making it public, although there is a (small) privacy concern. I think
> the cost of this implementation is low enough you could find a group
> of volunteers to host the system.

My take on this is that (general) ULA is supposed to provide access
to "almost" unique prefixes. This can be managed in a distributed way.

The "central" thing is supposed to take care of the 10^-<whatever>
chance that your's is used by someone else, too. Thus it is only (more)
useful (than general ULA) if the distribution environment can guarantee
uniqueness.

Such a guarantee involves management and review, and complaint handling
- eventually, plus protection against DoS-Attempts and legal protection.
I am not convinced that a simple (=cheap / for free) mechanism is "good
enough".

> --
> Shane

Wilfried.