sthaug@nethelp.no wrote:
It is not about how many devices, it is about how many subnets, because you may want to keep them isolated, for many reasons.
It is not just about devices consuming lots of bandwidth, it is also about many small sensors, actuators and so.
I have no problems with giving the customer several subnets. /56 is just fine for that. /56? How about /62? That certainly covers "several"... and if you're really worried they might have too many subnets for that to work, how about /60? I haven't seen any kind of realistic scenarios which require /48 for residential users *and* will actually use lots and lots of subnets - without requiring a similar amount of manual configuration on the part of the customer.
So we end up with /56 for residential users.
Only because people think that the boundaries need to happen at easy-to-type points given the textual representation. /56 is still overkill for a house. And there's several billion houses in the world to hook up. Matthew Kaufman