Once upon a time, Donald Stahl <don@calis.blacksun.org> said:
It leaves them with 65k subnets to choose from. Would a /56 make more sense? Right now- sure- becaue we lack the imagination to really guess what might happen in the future. Nanobots each with their own address, IP connected everything, who knows? Assigning a /48 to everyone gives everyone ample room and simplifies provisioning.
Do you really think that today's allocations are going to be in use (unchanged) when people are building homes out of IPv6-addressed nanobots, or when people are trying to firewall the fridge from the TV remote, etc.? I understand trying to plan for the future, but if someone is setting all this stuff up, getting a new (and larger) IPv6 block from their ISP is going to be the easiest part in the process.
I'd rather push for /48 and have people settle on /56 than push for /56 and have people settle on /64.
Again, why the hang-up on 8 bit boundaries? Why not /52 or /60? /60 is not much bigger than /64, but /52 gives an end-site 16 times as many subnets as /56 while giving the ISP 16 times as many blocks as /48. -- Chris Adams <cmadams@hiwaay.net> Systems and Network Administrator - HiWAAY Internet Services I don't speak for anybody but myself - that's enough trouble.