On Fri, 05 Aug 2011 12:17:48 EDT, Brian Mengel said:
In reviewing IPv6 end user allocation policies, I can find little agreement on what prefix length is appropriate for residential end users. /64 and /56 seem to be the favorite candidates, with /56 being slightly preferred.
I am most curious as to why a /60 prefix is not considered when trying to address this problem. It provides 16 /64 subnetworks, which seems like an adequate amount for an end user.
Basically, the thinking was a /56 is still "cheap" as far as allocating space, so if you need more than a /64, might as well go to /56 and avoid the mess if a user needs a 17th subnet. This isn't IPv4, where you have to actually worry about burning through your IP allocation doling it out to customers. Even a single /32 will service a *lot* of /56's, and I don't think *anybody* is big enough to actually burn through a /24 allocation (feel free to prove me wrong.. ;)