In article <CAMm+LwjNiE0P7RAVqzKMypNbh3=9BeqiWn_hGv3E=zX7-YmSXQ@xxxxxxxxxxxxxx> you write: >The proposal is to reserve a significant block of IPv6 space (e.g. >2002::/16) as non routable address space to be allocated in Class A/B/C >sized chunks on a permanent basis either through random assignment or by a >new registrar TBD for a negligible one-time fee ($0.10 or less). This would >provide significant operational benefits for large enterprises managing >complex networks. This sounds a lot like ULAs. You generate a 40 bit random number, prefix it with FD and that's your own /48. If you have a decent random number genarator the chances of your 40 bit number colliding with anyone else's are insignificant. See RFC 4193. I gather the problem in practice is that rather than a 40 bit random number, too many people use one that spells something cute or memorable in hex. R's, John PS: The ULAs on my network are in fde3:783e:127d::/48.
