[lime-dev] bmx6: more useful ipAutoPrefix?

Hey Axel, here i am, haunting your dreams again with tricky questions... ;) [i'm trying to get all interfaces of a node have public ipv6 addresses, instead of the fd66:66:66:: autogenerated ones. but ipAutoPrefix is not flexible enough, and assigning addresses manually (outside of bmx6) and then using bmx6 globalPrefix would be a hassle. the ideal would be to leverage bmx6 ipAutoPrefix feature, but with a smaller prefix (/64)] ipAutoPrefix currently needs to be a /56, so that two bytes can be set to the interface index, and form a /64. Why does each interface *need* to have a /64? could it be simply a /128? (or something smaller than a /64, at least) (outside of ULA space, it's relatively uncommon to have a /56 available for each node; a /60 would be more realistic, and /64 would be ideal) currently scheme AFAIU: XXXX:XXXX:XXXX:00II:MMMM:MMff:feMM:MMMM/64 Xs = ipAutoPrefix nibbles II = interface index Ms = mac nibbles maybe this could work the same: XXXX:XXXX:XXXX:XXXX:00II:MMMM:MMMM:MMMM/80 this way, ipAutoPrefix can be a /64, interface id is still there and while the EUI-64 format is dropped, i don't think that's a problem? i understand each interface should have it's own distinct network, as it is now. so, to maintain that, the size is a /80 (yay!) but maybe it could turn directly into a /128, like i asked before? again, i'm not sure how these addresses are used / why they are needed, so feel free to say simply "no, that wouldn't work at all" or "that'd break backwards compatibility" have a nice weekend, as always! gui