Name:	        Hytham Zakaria EL Nakhal
Organisation:   National Telecom Regulatory Authority, Egypt
Version:	Draft
Date:		07 July 2007
Status:	        Open for discussion
Authors:	Hytham EL Nakhal, Didier KLA, Roque Gagliano, Francisco Obispo,
      		
Policy Affected:	The current on-demand global policy for the distribution of 
                     IPv4 address space to the Regional Internet Registry (RIR) system. 

Incentive:	In order to assure the equal distribution of the IPv4
              address space across RIR regions, this policy proposal describes a
              process for the distribution of  the remaining IPv4 space from
              IANA to the existing RIRs
            
Rational and Background:

When IANA central pool reach certain minimum amount of IPv4 /8 blocks,
the remaining pool will be equaly distributed to existing RIR. 
This policy will replace the current on-demand policy.

In order to ensure the equal distribution of the IPv4 address space
across RIR regions, five (5) block units of assignments (/8s) will be
reserved for each RIR at the time of the approval of this policy.

The process is divided in two consecutives phases.

1.	Current Policy:

During this  phase IANA  will continue to  assign IPv4 space  to the
regional Internet registries using the current on-demand policy.

This phase will continue until a request of IPv4 address space from any
 RIR to IANA compromises the pool in a way that:

X = IPv4 block units available before the last request.

A = block units needed to fulfill the last request from a RIR.
R = Number of RIRs recognized by ICANN.

if R * 5 < = (X - A) -----------> Threshold value

Then the next phase will be activated.

2.	Distribution of the remaining IPv4 Address space:

IANA will automatically assigned the reserved IPv4 block units (/8s)
to the different regional registries (5 each) and respond to the last
request up to a limit that prevents a compromise of any of the block
units reserved for the regional registries.

2.1.	Calculations for the final assignments

The remaining space will be distributed, by assigning each RIR five
block units (/8s) and the remaining  space will be assigned to the RIR
that submitted the last request.
So for simplifing the process we can put the above describtion into
 equations; assuming that:
X is the IPv4 (/8) unit blocks available before the last request
and R is the number of RIRs recognized by ICANN

T = 5*(/8)        ,where (T: Bolck to be assigned to each RIR by IANA)

Y = X - (5*R)     ,where (Y: Surplus of /8 after assignment of 5 /8 to each RIR)
                
B = T + Y         ,where (B: Final assignment for the last RIR request, which request IPv4 
                   block from IANA when the threshold is reached) 


Proposal:
--------

Policy Statement:

This policy describes the process for the assignment of the remaining
 IPv4 space from IANA to the existing RIRs. When a minimum amount of
 available space is reached, an identical number of IPv4 assignment units (/8s)
 will be assigned from IANA to each RIR, replacing the current IPv4
 assignment policy.

In order to fulfill the requirements of this policy, at the time of its
 adoption, an identical number of IPv4 allocation units (N) will be
 reserved by IANA to be assigned for each existing RIR. The number N is
 defined as 5. The reserved units will no longer be part of the available
 space at IANA pool. 

The process for the assignment of the remaining IPv4 space is divided
 in two consecutives phases:

1. Existing Policy Phase:

During this phase IANA will continue assigning IPv4 addresses to the
 RIRs using the existing allocation policy. This phase will continue until a
 request for IPv4 address space from any RIR to IANA can not be fulfilled with the
 remaining IPv4 space available in the IANA remaining pool.

This will be the last IPv4 address space request that IANA will accept
 from any RIR. At this point the next phase of the process will be
 activated.

2. Exhaustion Phase:

IANA will automatically allocate the reserved IPv4 allocation units to
 each RIR (N units to each one) and respond to the last request with the
 remaining available assignemt units in IANA pool (Y).

2.1. Size of the final IPv4 allocations:

During this phase IANA will automatically allocate N allocation units
 to each RIR from the reserved space defined in this policy. IANA will also
 allocate Y allocation units to the RIR that submitted the last request for IPv4 
addresses.

2.2. Assignment of the remaining IPv4 Address space:

After the completion of the evaluation of the final request for IPv4
 addresses, IANA must:

     a.	Immediately notify the NRO about the activation of the second
 phase of this policy.
          
     b.	Proceed to assign Y units to the RIR that submitted the last
 request for IPv4 address         space.
        
     c.	Proceed to assign N units to each RIR from the reserved space.