I have a local network with 2 asus routers (rt-ac66u, wl500gp), 1 d-link router (with custom asus-like firmware dir-320) and 1 tp-link repeater/wifi range extender (that unfortunately doesn't support ipv6). IPv6 seems to work fine when I enable it only on a main router, but if I enable it on other routers it sometimes doesn't work from them.
Tested it by connecting to those routers via SSH and doing ping6 to various sites. I'm guessing it is because I'm supposed to select something else in other routers' IPv6 settings instead of 6in4 tunnel. The available options for them are: Static IPv6, Automatic IPv6, Tunnel 6in4, Tunnel 6to4, Tunnel 6rd. Which should I choose?
I have tried searching for configuring a network with more than 1 router, but only get articles about how to configure IPv6 for 1 router, but that already works and doesn't help me. I want to all my routers to be able to utilize IPv6, if that is possible. All other devices, even those connecting via different router seem to be able to access IPv6 network anyway, no matter if IPv6 is enabled on secondary router or not.
Just to clarify, I only have 1 IPv4 address and it is static.