Hi Med, No, it was not an IETF document, it was another study. I can't find anymore a link where it was published ... Regards, Jordi @jordipalet El 23/11/21 10:18, "ietf-bounces@xxxxxxxx en nombre de mohamed.boucadair@xxxxxxxxxx" <ietf-bounces@xxxxxxxx en nombre de mohamed.boucadair@xxxxxxxxxx> escribió: Hi Jordi, all, I guess you are referring to the study that was echoed in RFC7849: == According to [Power], the consumption of a cellular device with a keep-alive interval equal to 20 seconds (which is the default value in [RFC3948], for example) is 29 mA (2G) / 34 mA (3G). This consumption is reduced to 16 mA (2G) / 24 mA (3G) when the interval is increased to 40 seconds, to 9.1 mA (2G) / 16 mA (3G) if the interval is equal to 150 seconds, and to 7.3 mA (2G) / 14 mA (3G) if the interval is equal to 180 seconds. When no keep-alive is issued, the consumption would be 5.2 mA (2G) / 6.1 mA (3G). The impact of keepalive messages would be more severe if multiple applications are issuing those messages (e.g., SIP, IPsec, etc.). == That’s said, and as usual, we need to be careful in extrapolating results. Cheers, Med > -----Message d'origine----- > De : ietf <ietf-bounces@xxxxxxxx> De la part de JORDI PALET MARTINEZ > Envoyé : mardi 23 novembre 2021 08:45 > À : ietf@xxxxxxxx > Objet : Re: IPv6 causes global warming > > Exactly, I recall a study from Nokia, many years ago, demonstrating that > the use of NAT is terrible in terms of energy consumption. That was > especially relevant in cellular phones, but if you add the thousands of > millions of NAT boxes ... > > Regards, > Jordi > @jordipalet > > > > El 22/11/21 22:32, "ietf en nombre de Brian E Carpenter" <ietf- > bounces@xxxxxxxx en nombre de brian.e.carpenter@xxxxxxxxx> escribió: > > On 23-Nov-21 08:19, Nick Hilliard wrote: > > John Levine wrote on 22/11/2021 18:50: > >> But does anyone have any idea what this "report' might be? > > > > draft-petrescu-v6ops-ipv6-power-ipv4? > > > > The methodology raises questions about whether the results are > reliable > > enough to be quoted. > > Regardless of that, it's far from clear that even if those results > were valid in 2017 that they are still valid today, and how they relate to > total power consumption, because for all I know base stations use 10% less > power for IPv6 and core routers use 12.5% less. Warren, shall I write a > draft raising those hypotheses? > > How much power is being wasted at this moment by domestic NATs and CGN > boxes? > > Brian > > > > > ********************************************** > IPv4 is over > Are you ready for the new Internet ? > http://www.theipv6company.com > The IPv6 Company > > This electronic message contains information which may be privileged or > confidential. The information is intended to be for the exclusive use of > the individual(s) named above and further non-explicilty authorized > disclosure, copying, distribution or use of the contents of this > information, even if partially, including attached files, is strictly > prohibited and will be considered a criminal offense. 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