Hi Riccardo,

> Please explain how the current policy obtained a "success", luck? Why such 
> policy was accepted and reached its consensum at that time?

I can answer that one.

For 2010-02 (https://www.ripe.net/participate/policies/proposals/2010-02) the 
WG started working down from one /8. Then the proposal started RIPE NCC had 
±7540 LIRs. Using a /22 per LIR would allow for 16000 LIRs, so more than double 
the amount at the time. A /16 of address space was set aside for unforeseen 
circumstances, and the policy states that that reservation would become part of 
the main pool if not used for such unforeseen circumstances when the pool runs 
out.

I think Daniel's comment at the time sums it up quite nicely:
> And we have to care about new LIRs, we need to reserve some address space for 
> them - as lots of internet resources will be accessible only over IPv4 for 
> long period after depletion. It's about survivance of free allocatable IPv4 
> address space as long as possible.


2011-03 (https://www.ripe.net/participate/policies/proposals/2011-03) updated 
the policy regarding returned address space. If I remember correctly the 
arguments on the list at the time were that by putting all the returned address 
space in the same pool as 185/8 it was made sure that we wouldn't end up in a 
policy limbo where it was not clear which policy applied to which IPv4 
addresses.

Another good quote, Dave wrote about 2011-03:
> And, frankly, we should take every opportunity remaining to expand the meagre 
> pool of IPv4 addresses we leave to our children.


And that's how we arrived at today's policy.

Cheers,
Sander

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