Good point. I just find it wierd that my one HP printer gets an IPv6 address and the DNSv6 section configures yet my other HP printer also gets an IPv6 address but its DNSv6 sectoins remains unconfigured lol.
The printer likely doesn't support DHCPv6 and is using SLAAC. You'd have to push a DNS server with RDNSS. I doubt any consumer routers are pushing DNS via RDNSS.
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