On Thu, Jul 14, 2005 at 02:47:26PM +0100, Niall Murphy wrote:
Thomas, all,
I'd welcome discussion/feedback on it, and this list seems as good a place as any.
http://www.ietf.org/internet-drafts/draft-narten-iana-rir-ipv6-consideration...
This is nit-picking, but for the sake of clarity:
2.7. Utilization
In IPv4, the utilization of a chunk of address space is defined as the ratio of the actual number of host assignments to the theoretical maximum number of host assignments. For example, a /24 in IPv4 can number 256 hosts [...]
A /24 can't number 256 hosts; it can number 254.
an IPv4 /24 is 192.0.2.0-192.0.2.255 or 256 discreate numbers. subtract the all-ones and all-zeros.. 256-2 = 254... BUT ... wrap the /24 into a /22 and you -CAN- use the (apparent) zero & one nubmers are host assignments. the trick is in the mask and the placement of the "/24" in the overall announcement... you can't have an all-ones or all-zeros for the host.
Niall
--bill