[sig-ipv6] Re: (ngtrans) Fw: [apnic-announce] IPv6 Policy Document Revision

[Steve Deering <deering@cisco.com>]

At 8:34 PM +0200 7/7/00, Ronald.vanderPol@surfnet.nl wrote:
> > efficiency of assignment as log_10(1.07*10^10) / 45 = 0.22. 
>
>What does this mean? Do sites (/48) on average have 0.22*2^16=
>14417 networks (/64s)?

No.  You really need to read RFC 1715 to understand it.  The H ratio is a
measure of the assignment efficiency of an address space, which takes into
account the inevitable wastage that you get when the addresses must have
hierarchical structure.

In this particular case, the H Ratio that Matt computed applies to the
efficiency of allocation of the high-order /48 (a 45 bit space, when you
exclude the format prefix).  It says nothing about the usage of the low-
order 80 bits (which is irrelevant, for the point that Matt is making).

Steve

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