You are correct that only routable addresses are accepted for DNS server IPs for the router itself, but the DHCPv4 section does accept RFC1918 addresses which are then sent to clients in DHCPv4...

Appreciate your help in getting ULA addresses to work for DNS IPv6 IPs, that's a great start... Just FYI about DUIDs so the following paragraphs make sense. DUIDs are usually based on a MAC address...

Seems this issue got lost in there too, as someone posted about ULA IPs being rejected in 2023... https://community.tp-link.com/en/home/forum/topic/604494 Since that's been closed off I opened a new...

As reported back in 2023 (https://community.tp-link.com/en/home/forum/topic/604494) the app doesn't allow IPv6 DNS server IPs in the ULA (fd00::/8) range to be used, saying the IP is invalid. This...

The bot came to the same conclusion as I posted. That trying to add a DNS server IPv6 IP in the fd00::/8 (ULA) range is incorrectly being rejected, and as the bot pointed out fd00::/8 addresses can...

I'm aware of that option, but would the app actually log something at that point since the app won't even attempt to save?