Comment by tsimionescu
17 days ago
The whole premise of IPv6 is that every device should have a globally routable IP. This thread went into DHCP for some reason, but that is uncommon and not recommended for IPv6, where you're supposed to use SLAAC. With SLAAC, I'm not even sure you could realistically disable the ability to get a public IP. And if you did, I'm not sure you could allow a device to access the Internet over IPv6 with a consumer router without it having a publicly routable IPv6.
>The whole premise of IPv6 is that every device should have a globally routable IP
I would agree with the small adjustment of, 'every device should be able to have a globally routable IP'.
There are a lot of devices, like the ones we're talking about, that should not be accessible to the internet at large. You're not preventing them from getting a public IP because you don't have enough, you're preventing them from having a public IP as part of the belt-and-suspenders approach because there's no need to have one.
This is conflating unambiguous addressing with internet reachability. These things are separate, it was also in the pre-address shortage IPv4 days.