[address-policy-wg] Policy proposal: #beta: IPv4-HD-Ratio

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.