[jeroenhd]

Correct! It's relatively straightforward, actually: https://devzone.nordicsemi.com/nordic/nordic-blog/b/blog/pos...

You use one of the /64 tunnels provided for you to route the /48 tunnel to the rest of your network. You advertise a subnet from your /48 to your local network and if you've got SLAAC enabled on your hosts that's all there is to it.

You may need to mess with the default DNS server to get IPv6 results, though, that depends on whether or not your standard DNS server will respond to AAAA requests. It usually should, but some ISPs don't.

This only works for a flat network, of course. If you've got different routers, you'll need to set up a more complicated setup.