I have a FritzBox 7490 from my ISP (M-NET), which provides for my LAN a DS-Lite network setup (full IPv6, restricted IPv4).
The FritzBox provides in my LAN the main services for DHCP and route, as it is connected to WAN.
I use an Asus RT-N16 running TomatoUSB (Shibby, v1.28) as WLAN Access Point.
It should simply enable WLAN clients to use the IPv6 internet connection which is maintained by the FritzBox (main router).
My wish for the tomato:
* do not disturb the routing information at LAN - do not propagate its own IPv6 address as default route, take Prefix which is provided by FritzBox (main router)
* accessible by IPv6 address from LAN (at least) (i.e. activate IPv6)
I suspect that I need to use "Other (Manual Configuration)" in "IPv6 Configuration".
But I am not sure, what to use as "Router IPv6 Address" - the IPv6 Address of FritzBox (main router) or the IPv6 Address from Tomato.
I tried the Link Local IPv6 address from FritzBox. But now "ifconfig" at Tomato reveals that this IPv6 address is listed as "inet6 addr" for "br0" interface.
I am also not sure, what to use in the Advanced Routing setting: Router or Gateway?
My main problem is:
A normal client took the wrong IPv6 address as router address, so IPv6 internet connection does not work.
My temporal solution was to set Maximum "preference" level in the FritzBox setting for "Router Advertisement".
I want to get rid of any additional "Router Advertisement" from my secondary/cascaded Tomato, to avoid any disturbance of routing tables.