I have a WNR3500L with the latest version of Tomato Shibby (138) and am having some issues getting an IPV6 address. I am able to be assigned one when I've connected my computer directly to my modem, an Arris SB6183, but not when connected through the router as I'll only get an IPV4 address. I've tried both native IPV6 and DHCPV6 as my screenshots below show, and also tried a prefix length of 56 as well. Hope anyone can help me, thanks....
Tomato Shibby IPV6 troubles
Tomato Shibby IPV6 troubles