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

On Wed, 2023-07-05 at 16:52 +0200, Angela Dall'Ara wrote:

>  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. “

Hi,

I want to also point out here that the «50% after one year» requirement
as well as the «special circumstances» exception were not novel
concepts first introduced by 2013-03, they were simply moved (and
slightly simplified) from the general section of the policy into the
IXP-specific section, as the need evaluation was being removed from the
former.

To be clear, it was our (the 2013-03 authors) intention to leave these
mechanisms essentially as-is for IXP assignments specifically.

The old pre-2013-03 policy (which covered both IXP and non-IXP
assignments) read as as follows:

«6.3 Utilisation Rates

Assignments' immediate utilisation should be at least 25% of the
assigned space. After one year, this should be at least 50% of the
space unless special circumstances are defined.»

See https://www.ripe.net/publications/docs/ripe-599

I have not attempted to figure out exactly when this language was
introduced, but I suspect it has been around for a long time.

Tore