IPv6 ULA Router Advertisement not working on GUESTS interface with VLAN

[stb]

Thanks a lot! That's it! The "Guest Policy" checkbox in the Unifi Wireless Networking section was the issue after all!

Sorry for not having been more explicit ... I really thought you were asking for a Guest Captive Portal not being accessible via IPv6.

Anyway, thanks to all of you for your continuing support and help!

[johnpoz]

So looking at the new 5.11.10 release, looks like they have added ipv6?

from 5.11.5 in the release notes?
Add subnet for IPv6 networks in Networks Table.

I am currently running 5.10.21 which is not viable direct upgrade.. So can not test for sure until I get on 5.11.10, but you might want to try 5.11.10 if you want ipv6 with guest policy enable. But not captive portal.

[pooperman]

For anyone finding this in 2024, I had to enable "Multicast Enhancement" for the Unifi Wifi network AND I had to disable Hotspot 2.0. Only then did the Router Advertisements flow down to wifi clients. I was sitting in wireshark on a MacOS 14.6 laptop client and suddenly there was a flurry of traffic.

Pro-tip: You may have to wait for the RA interval for the Unifi change to make a difference. Default is 200 seconds, you can change this in the RA Server settings. I set mine to 10 seconds then clicked the button to restart the RA server.

This worked!