The third is why this needs to be a managed space
per se. If the desire is for a space that can be used within an ISP
network and is guaranteed to not overlap that of any routing peer,
placing the 32 bit AS number into the upper bits of the "Global ID"
gives each provider a /40 to play with, with no effort on the IANA's
part. Why not just do so?
this seems like the most reasonable way of distributing ULA that i've
read. apologies if that idea has been around for a while and i'm only
now just hearing it.