@fibronet
Below are some instructions to set up an IPv6 connection on the wireless router:
How to set up an IPv6 Internet connection on the Wi-Fi Routers
If the connection still fails, please ensure you have activated the IPv6 service with your ISP line and all the IPv6 parameters are correct, then verify the information as below:
1. Who is your ISP?
2. What is your network topology, is it ISP modem--A6?
3. Is the IPv4 connection on the A6 good or not? What is the WAN IP address of it?
4. Is the IPv6 connection type the same as IPv4? Are both PPPoE?