I should correct a typo in the note below. Under the HD scheme /9 and /10 allocation will account for 0.11% of the actual allocations, not 1% as I said below. This correction probably amplifies the comment that its the small number of large allocations that are critical in assessing the total impact of the HD Ratio framework. thanks, Geoff
I was also surprised by this number when I first saw it in the output.
Looking behind this 46% number, the outcome is a result of the amplified effects of the HD Ratio for large allocations. 50% of this increased address consumption is in allocations of /9 and /10 prefixes, which only account for 1% of all actual allocations, but 20% of the allocated addresses.
The other effect is a shift from /16 to /15 allocations in this HDR regime - /16s and /15s together contribute a further 15% to this increased address consumption.