I am running Advanced Tomato 3.4-140 (shibby 140) on my Nighthawk R7000, bridged to my Technicolor C2100T. Centurylink offers IPv6 through 6rd, and though I've got it properly set up in the R7000, it doesn't work. By doesn't work I mean, I've got no IPv6 connection, period. I can't even ping IPv6 addresses from the router. Only other thing I can say is that before I bridged the two, the modem was receiving an IPv6 just fine from CL. Really not sure where to start on figuring this out, and the logs show absolutely nothing useful in terms of IPv6, basically other than it's not connected. I have had 6rd working before on a different router/modem/firmware combo.