Another elephant in the room: /64, /56, or /48. The first one is completely unacceptable in the modern world, the second is acceptable and the third is desirab

Another elephant in the room: /64, /56, or /48. The first one is completely unacceptable in the modern world, the second is acceptable and the third is desirable ... per ISP connection. If you only get a /64 ie one IPv6 subnet prefix then you are only a tick in a box. Ideally you also get a separate uplink subnet too along with your shiney prefix for WAN. There is a RFC that will enable a sub-prefix from a prefix allocation to be taken out for WAN and make it all work. Sorry if that sounds like gibberish - I won't explain that lot here! There are so many things to get sorted with IPv6 - it is not a finished thing. It's only about 40 or so years old.