On 29/09/2008, at 7:35 AM, Brian E Carpenter wrote:
/56 is a choice currently used by the registries.
Maybe I should complete Brian's sentence:
/56 is a choice currently used by the registries in assessing
effective IPv6 address utilization using the HD ratio, as part of the
process of allocation of further address prefixes to an LIR. i.e. its
not dictating what address prefix an ISP must use to number end sites.
LIRs may use any profix size that they believe is appropriate to their
needs.
thanks,
Geoff
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