I also couldn't figure out to how to get that working. It's seems you need both DNS via RA (RFC6106) and (stateless) DHCPv6. Then there was a bug in CoreDNS th

I also couldn't figure out to how to get that working. It's seems you need both DNS via RA (RFC6106) and (stateless) DHCPv6. Then there was a bug in CoreDNS that wouldn't bind link local. What I learned from the text is that I should have probably generated a unique address for the DNS. It is not only confusing theoretically but also the ISP router config makes it even more confusing.