[IPv6]Re: Analysis of Ungleich ULA Registry

[Kyle Rose <[e-mail]>]

On Mon, May 27, 2024 at 12:18 PM David Farmer <[e-mail]> wrote:

> While the Ungleich ULA Registry demonstrates significant support for full
> registration, something like draft-hain-ipv6-ulac provides. My
> primary concern is a mechanism that allows for ULA prefixes shorter than
> /48 as a result of the practical restrictions of 10 ULA prefixes created by
> known-local ULA. I could accept a consensus to accomplish that through
> randomized local ULA assignments of ULA prefixes shorter than /48 instead
> of centralized ULA assignments. However, unfortunately, it is unclear to me
> that there is a consensus for either way forward.
>

As I've previously stated, I am fine with loosening the language on prefix
generation along with an extra loud warning about the greater chance of a
future conflict requiring renumbering as the prefix size gets shorter.

This seems fine to me because it literally only hurts the orgs that choose
to accept the incremental risk. And frankly I'd be shocked if there weren't
orgs already doing this because it just made sense for them to do so,
versus wrangling many separate /48s.

The main counterargument from the perspective of utility is essentially
"WTH are you doing with 64K /64s that you need *more*?" I'm sympathetic to
that argument, but given who gets to deal with the consequences, I consider
this largely NOMFB except as an academic matter.

Kyle