> > because, in the end, ULA (whichever flavor it is) leads to IPv6-to-IPv6 > > NAT. > > did you read the thread some months ago? There was mention ID and LOC > splitting. ULA fits that idea almost perfect. IP address, or part of it, can never be an ID. so i'm against of all of the ID/LOC separation stuff. IP address can never be an identifier because: - you can switch from one IP version to another - once you have private address/ULA of some sort, you have conflicts it is a crazy thought that you have a unique ID in the lower 64 bit in an IPv6 address. MAC address is indeed not unique - some vendors do not keep the rules. go down to hongkong/akihabara and buy cheap NE2000 ethernet cards, and you'll know. if you need to identify some node/whatever, use ssh secret key, X509 certs, and alike. IP address is just to specify communication endpoint, nothing else. itojun _______________________________________________ Ietf@xxxxxxxx https://www1.ietf.org/mailman/listinfo/ietf