On Sep 17, 2011, at 3:21 AM, Usman Latif wrote: Assigning a /64 is crazy... You should not be assigning your residential customers only a single subnet. Ideally, they should receive a /48, but, at an absolute minimum, I would think a /56. It's not about counting hosts. IPv6 was designed around the idea that counting hosts should be unnecessary and the 64 bits you are now complaining about wasting were added for the purpose of using them in this fashion. If they hadn't been allocated to this purpose, likely IPv6 would have been a 64 bit address rather than a 128 bit address.
of whether it's residential, commercial, etc.) and if we use up even so much as 20 /12s in less than 50 years, I will accept that we need to consider more conservative allocation strategies. This won't create a need to reclaim. The safety valve I am suggesting (at 20 /12s) leaves us with more than 3,564 /12s still in reserve to use with a more conservative allocation policy. (that without invading c000::/3 which is where multicast, link local, etc. are all reserved).
Owen
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