A converted bell-shaped-head writes: | HMM. Change is good. Otherwise evolution and innovation is not possible. Yes, and IPv6 is an evolutionary dead-end, and is about as useful as polyploidy is to a happily diploid organism whose growth is constrained by its external surface area. What is out-evolving IPv6? NAT, probably eventually leaning towards CATNIP. Hint: lots of change is happening in that space too, and you don't have to quadruple the amount of genes your poor transcriptase-like proteins have to deal with. Sean.