Yea, two separate things. Rovi, Sara, or Passport? Anyway, I think most of even the 1st generation D3 modems had IPv6 support(Including the 6120 past 1.0.3). Heck, so does the SB5101U. Most of that will be handled by a firmware update when the time comes, and most D2 modems will be compatible. I mean they will have to make it that way. Unlike the D2 to D3 transition which is optional, the IPv4 to IPv6 is much more mandatory, albeit with some wiggle room. Where you want to do some research though is on the router side, basically past the CPE, because thats where things will get complicated for the consumer.