> I have an application where I will have approximately 2000 hosts (many > of them virtualized) in a cabinet, and I will eventually have hundreds > of such cabinets spread around the world. (snip) i wonder - why do you require it be a continuous address space? if your device do authenticate properly with each other, you can just use IPv6 prefixes from local ISPs (PAs). itojun _______________________________________________ Ietf@xxxxxxxx https://www1.ietf.org/mailman/listinfo/ietf