On 11/14/13 12:42 PM, "shogunx@xxxxxxxxxxxxxxxxx" <shogunx@xxxxxxxxxxxxxxxxx> wrote: >>> My gut is that until we have a unified story and some fielded product >>>on >>> deploying v4 over v6, that for a number of ISPs, adding v6 is just >>>added cost >>> with no savings. > >Its worse than that. Given that v4 has been monetized by big ISPs, it is >actaully a revenue loss for them to transition to v6 on a large scale. Do you mean IPv6-only is a revenue loss, or dual-stack or some kind of transition mechanism? I'm pretty sure I don't understand your point. Lee