RT-BE88U: IPv6 routing fails for LAN clients

[jzchen]

@Ripshod Your DNS settings that you shared are for IPv4 DNS over TLS, not related to IPv6 which needs it's own DNS IPv6 Address, this setting @JaneuX posted. It should be Automatic/Enable:

 

[jzchen]

My phone only got a FE80:xxx which is local ipv6. My router log showed the router got a public ipv6 (2600:xx) and a local ipv6, also the wifi guest network got its own public/local ipv6. For some reason, my phone and computer did not get their own public ipv6 addr connected to this network.

It is my understanding that "Native" means the Router assigns the IP addresses given "/64", meaning the ISP assigns the first part 2600:xxxx:xxxx:xxxx:xxxx

What I suggest is put the complete public IPv6 address as your DNS server address, (onto your PC, phone, all your devices), which is the same as what Automatic Enable that I just posted...

 

[jzchen]

This is exactly what I have. My clients gain a IPv6 “2001” but they can’t ping ipv6.google.com

You mean set the ipv6if to „eth“ via ssh, could work?

I haven't used -ssh in a long time. I don't know the answer to that...

I tried to share all the settings I have for IPv6 and IPv4 (just in case). I am afraid I have limited understanding.

What I do know is I tried all sorts of combinations of IPv6 settings. In the end none of them worked.

I then factory reset the router. I turned on IPv6, and selected Native. It seemed to work. (Passthrough seemed to work also but I know from research AT&T is "Native" so I chose that).

I'm confident I tried this combination of settings already. The only thing that is different is now I have an invalid IPv6 DNS server address, but everything works otherwise...