> . . perhaps IPv7 will just be IPv4 with 48-bit addresses.
I would immediately convert if someone made "It's just IPv4 but we've changed the size of the address space to either 64 or 128 bits and it works with regular IPv4 because the address format is $addr.ipv.n.arpa and IPvN systems treat that as an address but IPv4-only systems try to resolve it as a hostname and DNS providers return a special bridge address for it". I'd be excited to adopt such a protocol. There's very little downside, and then there's the obvious upside: more address space. IPv6 has a lot of terrible stuff and the upside is too much address space.
> yeah i know, never happen
If someone does it, it will. Maybe someone *is* doing it.
i think 128 bits is too long, it makes addresses awkward to write and hard to remember. i said 48 bits, just add a couple octets, but 64 is probably reasonable. not enough for a unique identifier for every electron in the universe, but plenty for us and our grandchildren..
the most shocking thing I learned when taking the v6 course was that they were planning to do away with NAT. not only does it enlarge your potential address space, it provides for some privacy and security that you just don't have with every light bulb connected to the universe.