[arin-ppml] Set aside round deux

Mon Jul 26 22:22:09 EDT 2010

Chris,

I'm not sure I understand your why not a /24 comment... can you clarify?

|An applicant may provide ARIN with a thirty-month forecast of IPv4 
|address need. ... When a reservation forecast is approved by ARIN, the 
|applicant will then be authorized to draw down from the forecast 
|quarterly. 

Are you saying:

1. A customer with ten 3-month quarters (30 months) with a documented need 
of ten /24s should be able to reserve either:
 A] one /21 and one /23 
 B] one  /21 (rounded down to the nearest CIDR)
 C] one /20  (rounded up to the nearest CIDR)

This customer could then attempt to justify and draw down one /24 every 3 
months.

2. A customer with a 30 month documented need for one /24 should be able 
to reserve one /24.

This customer could then attempt to justify and draw down either:
 A] one /28 every 3 months for the first year 
    and a /27 every 3 months for the last 1.5 years
    (or some similar combination of the same number of /28s and /27s)

 B] one /28 every 3 months (allowing the extra six /28s for rounding up)

3. A customer with a 24 month documented need for one /24 should be able
to reserve one /24.

This customer could then attempt to justify and draw down one /27 every 3 
months (shortening their draw down to two years due to rounding down)

4. A customer with a 30 month documented need for one /24 should be able
to immediately draw down a single /24, but then get no additional 
transition space in the next 30 months. 

On Mon, 26 Jul 2010, Hannigan, Martin wrote:

|Based on that, an entity would need to qualify for a /20 over a $long
|time span. The time span noted does not perfectly match up to CIDR
|boundaries FWIW, but it will when everything is settled.

Maybe 32 months would be a more round number?  Thats is 2^5 months.  
Unfortunately that would give use 10 quarters (3 month periods) and one 
two month period at the end.  

__Jason

==========================================================================
Jason Schiller                                               (703)886.6648
Senior Internet Network Engineer                         fax:(703)886.0512
Public IP Global Network Engineering                       schiller at uu.net
UUNET / Verizon                         jason.schiller at verizonbusiness.com

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On Mon, 26 Jul 2010, Chris Grundemann wrote: