On Nov 22, 2013, at 6:00 PM, SM <sm@xxxxxxxxxxxx> wrote: > It's not that people want CGNs around for a long time. It's an irrational choice [2] as people might feel that they are wasting what they have paid for. I don't think this is realistic with respect to a typical network operator. It's generally expected that equipment needs to be replaced on some kind of schedule. I would hope that by the time the next replacement time rolls around for the CGN hardware, it would simply not be replaced. But this is easier to do with stateless-in-the-core NATs.