[address-policy-wg] 2023-01 Review Phase (Reducing IXP IPv4 assignment default size to a /26)

Dear Nick,

The requirement in the current policy (ripe-733) [1] that /“After one 
year the utilisation of the new assignment must be at least 50%, unless 
special circumstances are defined"/ is implemented the way Marco 
previously explained: the 50% utilisation refers to an estimated 
projection, which must be supported by the documentation provided by the 
IXP when requesting an assignment larger than the minimum size.

This requirement was first introduced in the ripe-604 [2] policy 
document, after the approval of proposal 2013-03 [3], to maintain the 
need evaluation for IXP assignments. The RIPE NCC Impact Analysis [4] on 
proposal 2013-03 was: /“It is the RIPE NCC’s understanding that Internet 
Exchange Point assignments larger than /24 would be based on documented 
calculations that allow the utilisation to be estimated one year after 
the date of assignment. This utilisation should be at least 50% of the 
assignment. “/

The requirements for returning the unused space to the IXP pool are 
described in paragraph 6.1.5 of the current policy: /“IXPs holding other 
PI IPv4 space for their peering LAN (i.e. they are seeking a larger 
assignment), and any IPv4 space assigned from this pool that is no 
longer in use, must be returned to the pool within 180 days of disuse or 
a new assignment.“/

I hope this helps.

Kind regards,
Angela Dall’Ara
Policy Officer
RIPE NCC

[1] https://www.ripe.net/publications/docs/ripe-733
[2] https://www.ripe.net/publications/docs/ripe-604
[3] https://www.ripe.net/participate/policies/proposals/2013-03
[4] 
https://www.ripe.net/participate/policies/proposals/2013-03#impact-analysis


On 04/07/2023 20:33, Matthias Wichtlhuber wrote:
> Hi Nick,
>
> Marco or Angela from RIPE should be able to answer this question. I have no insights into this beyond what was communicated by RIPE on this list.
>
> Regards,
> Matthias
>
> --
> Dr.-Ing. Matthias Wichtlhuber
> Team Lead Research and Development
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> ________________________________________
> Von: Nick Hilliard<nick at foobar.org>
> Gesendet: Dienstag, 4. Juli 2023 20:18:55
> An: Matthias Wichtlhuber
> Cc: RIPE Address Policy Working Group
> Betreff: Re: AW: [address-policy-wg] 2023-01 Review Phase (Reducing IXP IPv4 assignment default size to a /26)
>
> Matthias Wichtlhuber wrote on 30/06/2023 10:58:
>>> When receiving requests for more than a /24, the RIPE NCC checks that
>>> the IXP will need more than 50% of the assignment within one year. If
>>> their growth rate is too slow and we expect that it will take more than
>>> a year to exceed that utilisation threshold, we suggest that they
>>> postpone their request.
>> Thus, this issue is not urgent and can be discussed separately. I hope that answers open questions.
> Hi Matthias
>
> Let me ask the question in a different way.  The policy says:
>
>> After one year, utilisation of the new assignment must be at least 50%, unless special circumstances are defined.
> If the IXP is using less than 50% after one year, what happens?  Will
> the assignment be deassigned?
>
> If the answer is "yes, the assignment will be deassigned", does the RIPE
> NCC apply some form of threshold to determine whether or not to
> deassign?  I.e. if the assignment less than exactly 50%, or is there a
> practical slop factor in there?
>
> Nick
>
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