IPv4 and IPv6 subnets are different. While a single IPv4 is taken to be a single device, an IPv6 /64 is designed to be treated as an end user subnet.
https://tools.ietf.org/html/rfc3177 section 3. On 05/04/2015 9:05 am, "Mike Hammett" <na...@ics-il.net> wrote: > That makes sense. I do recall now reading about having that 8 bit > separation between tiers of networks. However, in an IX everyone is > supposed to be able to talk to everyone else. Traditionally (AFAIK), it's > all been on the same subnet. At least the ones I've been involved with have > been single subnets, but that's v4 too. > > > > > ----- > Mike Hammett > Intelligent Computing Solutions > http://www.ics-il.com > > > > ----- Original Message ----- > > From: "Valdis Kletnieks" <valdis.kletni...@vt.edu> > To: "Mike Hammett" <na...@ics-il.net> > Cc: "NANOG" <nanog@nanog.org> > Sent: Saturday, April 4, 2015 5:49:37 PM > Subject: Re: Small IX IP Blocks > > On Sat, 04 Apr 2015 16:06:02 -0500, Mike Hammett said: > > > I am starting up a small IX. The thought process was a /24 for every IX > > location (there will be multiple of them geographically disparate), even > though > > we nqever expected anywhere near that many on a given fabric. Then okay, > how do > < we d o v6? We got a /48, so the thought was a /64 for each. > > You probably want a /56 for each so you can hand a /64 to each customner. > > That way, customer isolation becomes easy because it's a routing problem. > If customers share a subnet, it gets a little harder.... > >
