On 25-apr-2005, at 8:55, Guido Roeskens wrote:
What are you proposing? RFC 3194 is a descriptive RFC, it doesn't proscribe anything. What kind of HD ratio would you want to apply to IPv4 allocations?
The proposed value of the HD ratio for IPv4 is 0.96"
Note that the current HD ratio for all IPv4 address space that isn't reserved by IANA is 90.45%.
As you see the HD Ratio propsed is much higher but would help LIR's with bigger allocations to justify their IP usage.
Ah, but the crucial question then becomes: what size allocation are these LIRs going to receive? For a /16 a HD ratio of 96% means 42k out of 66k addresses must be used = 64% (where k = 1000), but for a / 12 it means 602k out of 1049k = 57% and for a /8 8.6M out of 16.8M = 51%. So this means that if this proposal is accepted, it's important for the NCC to allocate the smallest possible blocks, and certainly not blocks of a million addresses or more, which seems to be the latest trend that nobody in the know seems to want to comment on. Also, it seems counter-intuitive that the more addreses you have, the more you're going to waste. Sure, a big ISP may have one or even two more aggregation levels than a small one, but it's easier to reroute part of 8.2M unused addresses to somewhere else in your network than some of 20 unused addresses as would happen in a very small network.