3 ms·

I think he's talking from an end-user point of view.

• danellis 11y ago
  Even from an end user point of view, the recommendation is to assign a /64 for a single network or a /48 for multiple networks. (Assuming 'end user = homeowner' here.)
  • ghshephard 11y ago
    And, as it turns out, the original recommendation to go with /48s turned out to be insufficiently flexible, and was overridden with https://tools.ietf.org/html/rfc6177 https://tools.ietf.org/html/rfc6177. In particular, some ISPs will hand out a /56 - allowing the home user 256 /64s. But, once again, these are administrative routing decisions - on the interface, it's always a /64 or (in some rare cases - though I'd love to hear if people still see this in the wild) /127s for router-router connections. You will never, ever see, for example, a /72 IPv6 network in the wild.