Path: news.eternal-september.org!eternal-september.org!feeder3.eternal-september.org!2.eu.feeder.erje.net!3.eu.feeder.erje.net!feeder.erje.net!news.in-chemnitz.de!news.swapon.de!weretis.net!feeder8.news.weretis.net!news1.tnib.de!feed.news.tnib.de!news.tnib.de!.POSTED.torres.zugschlus.de!not-for-mail From: Marc Haber Newsgroups: comp.os.linux.misc Subject: Re: Anybody Using IPv6? Date: Wed, 21 May 2025 21:14:30 +0200 Organization: private site, see http://www.zugschlus.de/ for details Message-ID: <100l8mm$80bd$1@news1.tnib.de> References: <100i89e$19k3$1@news1.tnib.de> <100i92h$2a8rb$3@dont-email.me> <100ieve$1o3d$1@news1.tnib.de> <100irbu$2j9c$1@news1.tnib.de> <100jqfp$4o04$1@news1.tnib.de> <100k1v0$2o6n2$1@dont-email.me> <100kcnb$649q$1@news1.tnib.de> <100kpc3$6vge$1@news1.tnib.de> <100ksip$2thrp$1@dont-email.me> MIME-Version: 1.0 Content-Type: text/plain; charset=utf-8 Content-Transfer-Encoding: 8bit Injection-Date: Wed, 21 May 2025 19:14:31 -0000 (UTC) Injection-Info: news1.tnib.de; posting-host="torres.zugschlus.de:81.169.166.32"; logging-data="262509"; mail-complaints-to="abuse@tnib.de" X-Newsreader: Forte Agent 6.00/32.1186 The Natural Philosopher wrote: >On 21/05/2025 15:52, Marc Haber wrote: >> "Carlos E. R." wrote: >>> On 2025-05-21 13:16, Marc Haber wrote: >>>> I think that the local resolver should² also refrain from asking for >>>> AAAA records if the local system doesn't have IPv6, but I don't know >>>> whether this special-case handling is implemented at all. And I'm too >>>> lazy to look that up. >>>> >>>> But all this needs to be taken into account before someone can comment >>>> about speed of one IP protocol compared to the other on a level that >>>> is beyond passing myths. >>> >>> It just is a perceived fact. On some machines, if an application gets >>> back from the system a list of addresses to try, and tries IPv6 first >>> when there is no actual IPv6 internet connectivity, there is a small >>> delay waiting for the request to fail, and then try the next address in >>> the list. >> >> pcap/strace or it didn't happen. >> >> Please note that _broken_ IPv6, for example when the router announces >> an IPv6 but the network doesn't return a host unreachable ICMPv6 >> message from the place where connectivity is missing, will cause an >> IPv6-enabled application to wait for the time out. But that is an >> error in the _network_ setup, and should not happen in the case where >> the end system (the one with the application running) has v6 enabled >> on a non-v6-enabled network. >> >Sure. Its always *somebody elses* problem. YOUR network is YOUR problem. -- ---------------------------------------------------------------------------- Marc Haber | " Questions are the | Mailadresse im Header Rhein-Neckar, DE | Beginning of Wisdom " | Nordisch by Nature | Lt. Worf, TNG "Rightful Heir" | Fon: *49 6224 1600402