On 2007-12-06 12:28, Iljitsch van Beijnum wrote:
On 4 dec 2007, at 17:13, Brian E Carpenter wrote:So I'd like to see /60 for consumers and /48 for anyone who feels /60 isn't enough.Are you sure that 16 subnets is enough for a large family house with entertainment, building services, and home office all running on various technologies? I'm not, but I'm pretty sure /56 is enough.Switches are cheap, routers much less so, especially if you want the traffic to flow at line rate. You need routers to keep subnets apart. So I don't see how an average home is going to use more than a handful of subnets the way things are now.
Switches don't work well between different technologies. I remember reading
that luxury cars today contain at least ten different level 2 networks
in various technologies. I don't see why we should expect future homes
to be much different - and as soon as you have multiple technologies,
cheap switches can't be assumed. So I don't think we should be conservative.
Brian
There is one exception: the case where multiple routers are deployed in a cascading style and each provisions address space to the next one. Assuming a router gives up half of its own address space to its subordinate, you can have four levels of routing in your home with a /60.