Havard Eidnes wrote: From what I've picked up from reputable sources, we're pushing the limits, and Moore's law does not appear to apply to the rather specialized market of humungous TCAM chips. I'm not sufficiently of an optimist that I think we won't hit a technological limit in the case of us collectively injecting too much entropy into the global routing table.
Getting back to the policy part and not the technicalities of forwarding plane implementation: this is not the point. Keep in mind that part the very design of IPv6 is precisely the uncertainties around hitting a wall at some point. 10 years ago, I defended your position for the same reasons you do, and I am not among those saying that there is no risk, or that it will work the next 20 years the same way it worked the past 20. Nobody has a crystal ball. Here is the point: now the name of the game is no longer making it right, it's making it happen at all. We do not have the luxury of contemplating a 15 year deployment horizon anymore. What we are weighing in now are 2 opposite risks: the risk of hitting a wall in DFZ size in the future, against the risk of a total deployment failure. Michel.