On Tue, Nov 1, 2022 at 10:31 AM Wolfgang Tremmel < [email protected]> wrote:
> No. But renumbering an IX is *pain*. A lot of pain. You want to avoid that > if possible. > A /26 allows (given that the IX uses about 2-4 IPs itself) about 60 > customers. > > So according to the numbers, for 70% of the IXes this will never fill up, > so no need for renumbering. > Depending on how quickly it filled up, you then go either for a /25 or a > /24. > > To sum up: > - if you start with a /26 ==> 30% has to renumber > - if you start with a /29 ==> 75% has to renumber ---> more pain! > I think maybe we want something in between; what do /27 and /28 look like? /29 could be forcing too much pain into the system, and /26 probably isn't enough pain in the system. Furthermore, /29 seems a little too small for a reasonable growth cycle before having to renumber. 50% fill of a /29 would be 3 of 6 usable addresses. Meaning many IXes could almost immediately qualify for a larger subnet, and they would have very much time to implement a renumbering process. Whereas with a /28, 50% fill would be 7 of 14 usable addresses. That seems like it would allow for reasonable growth before having to renumber and some runway to actually accomplish the renumbering process. Basically, a /29 is probably too small to be practical. Thanks > > Am 1. Nov 2022 um 15:48 schrieb Tore Anderson <[email protected]>: > > > > If not, how exactly would a default > > /29 policy «cripple» an IX from growing past 6 members, or a default > > /28 «cripple» it from growing past 14 members for that matter? > > -- > Wolfgang Tremmel > > Phone +49 69 1730902 0 | [email protected] > Executive Directors: Ivaylo Ivanov and Sebastian Seifert | Trade Registry: > AG Cologne, HRB 51135 > DE-CIX Management GmbH | Lindleystrasse 12 | 60314 Frankfurt am Main | > Germany | www.de-cix.net > > -- > > To unsubscribe from this mailing list, get a password reminder, or change > your subscription options, please visit: > https://lists.ripe.net/mailman/listinfo/address-policy-wg > -- =============================================== David Farmer Email:[email protected] Networking & Telecommunication Services Office of Information Technology University of Minnesota 2218 University Ave SE Phone: 612-626-0815 Minneapolis, MN 55414-3029 Cell: 612-812-9952 ===============================================
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