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.. ;)
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