On Feb 4, 2009, at 7:08 PM, Seth Mattinen wrote:
Patrick W. Gilmore wrote:
Second, where did you get 4 users per /64? Are you planning to hand each cable modem a /64?
That was the generally accepted subnet practice last time I had a discussion about it on the ipv6-ops list. I'm not an ISP, but I have a /48 and each subnet is a /64. Some devices will refuse to work if you subnet smaller than a /64. (Yes, poorly designed, etc.)
I Am Not An ISP either. :) I guess I was thinking about v4 modems which do not get a subnet, just an IP address. If we really are handing out a /64 to each DSL & Cable modem, then we may very well be recreating the same problem. And before anyone says "there are 281474976710656 /48s!", just remember your history. I was not there when v4 was spec'ed out, but I bet when someone said "four-point-two BILLION addresses", someone else said "no $@#%'ing way we will EVER use THAT many...." -- TTFN, patrick