[LACNIC/Politicas] Fwd: [address-policy-wg] ETNO comments on AD ratio for IPv4 addresses allocation
marcelo bagnulo braun
marcelo at it.uc3m.es
Thu Sep 16 12:02:21 BRT 2004
Sobre uno de los temas que hemos discutido en esta lista ultimamente,
un informe enviado a RIPe
Inicio mensaje reenviado:
> De: "Debecker J.L." <debecker at etno.be>
> Fecha: 16 de septiembre de 2004 12:01:01 GMT+02:00
> Para: <address-policy-wg at ripe.net>
> Cc: <gerd.wiedenhaupt at t-systems.com>,
> <alain.bidron at francetelecom.com>, "Michael Bartholomew"
> <bartholomew at etno.be>
> Asunto: [address-policy-wg] ETNO comments on AD ratio for IPv4
> addresses allocation
> Responder a: <debecker at etno.be>
> Dear Sir, Madam,
> ETNO, representing 41 major telecom operators from 34 European
> has studied the proposal to replace the fixed utilisation criteria of
> 80% in
> IPv4 address space allocation, by criteria based on AD (Assignment
> ratio. Our conclusions are formulated in the attached Expert
> EC064. The document is the unanimous opinion of ETNO Members
> represented in
> the ETNO Frequency Management Working Group and has been endorsed by
> ETNO Board.
> We are all prepared to discuss these comments in more detail and
> useful. ETNO will be pleased to contribute to the further development
> Europe’s views on the issue.
> Best regards,
> Michael Bartholomew
> ETNO Director
> September 2004
> ETNO Expert Contribution on AD ratio for IPv4 addresses allocation
> Executive Summary
> ETNO (1) has considered the proposal to replace the fixed utilisation
> criteria of 80% in IPv4 address space allocation, by a criteria based
> on AD
> (Assignment Density) ratio.
> ETNO strongly support the proposal and suggest selecting an AD ratio of
> ETNO further suggest to the RIRs to monitor the impact of this measure
> address consumption and periodically report on it to the addressing
> During the RIPE 48 meeting in Amsterdam, a proposal was presented by
> to replace the fixed utilisation criteria of 80% to request additional
> addresses blocks, by a criteria based on "AD ratio" value. This ratio
> corresponds to a logarithmic scale and corresponds to a percentage
> utilisation, which decreases as the size of the address space grows.
> The presentation can be downloaded at:
> The decision was made to take the discussion to the RIPE Address-policy
> working group mailing list and to ask for some feed back from the
> As most European Telecommunications Network Operators' Association
> members are large or extra-large Local Internet Registries in Europe,
> representing an important part of these categories in the RIPE region,
> proposal was considered and analysed with attention.
> 1- This proposal fairly takes into account addressing hierarchies used
> large and extra-large registries and introduces a useful level of
> flexibility for those registries.
> 2- The Local Internet Registries using the 80% criteria may continue
> to do
> so and will not be impacted by the new policy.
> 3- Complicated calculation or administrative burden should be easily
> to registries choosing this method using simple chart or software
> LIR portal.
> 4- As analysed by APNIC, the impact on address consumption is limited
> to a
> maximum around 20% and can be easily controlled and monitored using a
> conservative approach (AD ratio of 0.966).
> 5- This impact can be partly counterbalanced by reducing the number of
> and extra-small registries whose existence is only justified by
> overhead of large registries with current 80% criteria, and has a
> impact on address aggregation.
> 6- No additional impact on registrations is seen in RIPE region, as
> infrastructure assignments are already registered in the database.
> ETNO strongly supports this proposal and suggest selecting a
> conservative AD
> ratio value of 0.966.
> ETNO also suggest to the RIRs to monitor the use of this facility and
> impact on address consumption, and periodically report on it to the
> addressing community.
> (1) The European Telecommunications Network Operators' Association is
> representing 41 major companies from 34 European countries, providing
> electronic communications networks over fixed, mobile or personal
> communications systems. ETNO's primary purpose is to establish a
> constructive dialogue between its member companies and actors involved
> the development of the European Information Society to the benefit of
> More information on ETNO can be found at: www.etno.be
> ETNO Expert Contribution EC064 (2004/09)
Please note that my former email address
mbagnulo at ing.uc3m.es is no longer in use
Please send mail to:
marcelo at it dot uc3m dot es
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