Re: [Autoconf] RFC 5889 (Was: Call for comments to a new AUTOCONF charter proposal)
Thomas Heide Clausen <thomas@thomasclausen.org> Fri, 23 July 2010 08:15 UTC
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From: Thomas Heide Clausen <thomas@thomasclausen.org>
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Date: Fri, 23 Jul 2010 10:15:33 +0200
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References: <4C2A6BB7.1000900@piuha.net> <201007230723.58638.henning.rogge@fkie.fraunhofer.de> <4C494806.5060609@gmail.com> <201007230951.51192.henning.rogge@fkie.fraunhofer.de> <4C494EAE.9000600@gmail.com>
To: Alexandru Petrescu <alexandru.petrescu@gmail.com>
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Cc: autoconf@ietf.org, "Dearlove, Christopher (UK)" <Chris.Dearlove@baesystems.com>
Subject: Re: [Autoconf] RFC 5889 (Was: Call for comments to a new AUTOCONF charter proposal)
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On Jul 23, 2010, at 10:11 , Alexandru Petrescu wrote: > Le 23/07/2010 09:51, Henning Rogge a écrit : >> On Fri July 23 2010 09:43:02 Alexandru Petrescu wrote: >>>> if each of the MRs use a wireless interface, the linklocals WILL >>>> BE VISIBLE outside their direct link. >>> >>> Well, the link local addresses will not be visible outside their >>> direct link, because the different links are on different ESSIDs >>> and moreover on different channels. Using wireshark on IP packets >>> on these different links shows that the link local addressess are >>> not visible from one link to another. >> >> This would only work with preplanned links, > > Most deployments have a high degree of planning. Then, they're (by definition) not ad-hoc networks. >> because otherwise you would have trouble to do neighborhood >> detection. How do you detect new nodes coming into range if they >> cannot announce their presence with a broadcast, because they got no >> unique ESSID to their neighbors ? > > Well good question - and I have tried. The difficult thing is the first > detection - the "wifi scan" phase; once the drivers have their data set > up then re-detection is very fast, in the order of tens of milliseconds. > We could use that to signal between two approaching vehicles. > > More specifically, on WiFi, a beacon is sent periodically, but there are > also periodic requests replied with a beacon. These help a lot to > detect presence of a neighbor previously learned, and fast. > >> MANET routing protocols are specially designed for the case of >> unplanned networks. You have a single shared medium which the routing >> protocol use for it's work, to do neighborhood/link detection. > > Well very good. Is there a case where wireless multi-hop networks are > possible _without_ MANET routing protocols? I believe yes, and I > prototyped and demo. Very well, but then that's not a MANET. > Besides, there exist deployments where even though the MRs are mobile > they stay relatively fixed with respect to each other, in some very > simple topology: truck convoy, wagons in a train, etc. These things > stay formed for long hours and reform right after. These things don't > need the power of MANET routing protocols because there are never loops > formed at link layer, the topology is really simple. Very well, but then that's not a MANET. Alex, can we agree that things that are not MANETs tautologically are not MANETs? Thomas >> If you push this down to link layer, you just move the whole problem >> down one layer, because you need unique addresses on the link layer >> to do neighborhood detection and link establishment. > > WEll yes... I tend to agree. > > However, one would avoid to bring existing link layer mechanisms up to > the IP stack too. These link layer mechanisms are there and work very > well in their domain. > > The IP stack is not fast enough on the CPU to work at vehicular speeds, > interruptable by some GUI or heavy TCP. > > The link layer driver executing on a dedicated chipset is much more > reliable for these kinds of movements. > >> If you already have a unique link-layer address, just use it to >> generate a unique linklocal-IP. > > Hmmm... right, that's how link local addresses are generated. > > Alex > >> >> Henning Rogge >> > >
- Re: [Autoconf] RFC 5889 (Was: Call for comments t… Alexandru Petrescu
- [Autoconf] RFC 5889 (Was: Call for comments to a … Jari Arkko
- Re: [Autoconf] RFC 5889 (Was: Call for comments t… Jari Arkko
- Re: [Autoconf] RFC 5889 (Was: Call for comments t… Jari Arkko
- Re: [Autoconf] RFC 5889 (Was: Call for comments t… Henning Rogge
- Re: [Autoconf] RFC 5889 (Was: Call for comments t… Teco Boot
- Re: [Autoconf] RFC 5889 (Was: Call for comments t… Dearlove, Christopher (UK)
- Re: [Autoconf] RFC 5889 (Was: Call for comments t… Ulrich Herberg
- Re: [Autoconf] RFC 5889 (Was: Call for comments t… Charles E. Perkins
- Re: [Autoconf] RFC 5889 (Was: Call for comments t… Alexandru Petrescu
- Re: [Autoconf] RFC 5889 (Was: Call for comments t… Stan Ratliff
- Re: [Autoconf] RFC 5889 (Was: Call for comments t… Alexandru Petrescu
- Re: [Autoconf] RFC 5889 (Was: Call for comments t… Zach Shelby
- Re: [Autoconf] RFC 5889 (Was: Call for comments t… Henning Rogge
- Re: [Autoconf] RFC 5889 (Was: Call for comments t… Teco Boot
- Re: [Autoconf] RFC 5889 (Was: Call for comments t… Henning Rogge
- Re: [Autoconf] RFC 5889 (Was: Call for comments t… Erik Nordmark
- Re: [Autoconf] RFC 5889 (Was: Call for comments t… Zach Shelby
- Re: [Autoconf] RFC 5889 (Was: Call for comments t… Ryuji Wakikawa
- Re: [Autoconf] RFC 5889 (Was: Call for comments t… Ryuji Wakikawa
- Re: [Autoconf] RFC 5889 (Was: Call for comments t… Emmanuel Baccelli
- Re: [Autoconf] RFC 5889 (Was: Call for comments t… Emmanuel Baccelli
- Re: [Autoconf] RFC 5889 (Was: Call for comments t… Jari Arkko
- Re: [Autoconf] RFC 5889 (Was: Call for comments t… Ulrich Herberg
- Re: [Autoconf] RFC 5889 (Was: Call for comments t… Jari Arkko
- Re: [Autoconf] RFC 5889 (Was: Call for comments t… Teco Boot
- Re: [Autoconf] RFC 5889 (Was: Call for comments t… Teco Boot
- Re: [Autoconf] RFC 5889 (Was: Call for comments t… Henning Rogge
- Re: [Autoconf] RFC 5889 (Was: Call for comments t… Teco Boot
- Re: [Autoconf] RFC 5889 (Was: Call for comments t… Alexandru Petrescu
- Re: [Autoconf] RFC 5889 (Was: Call for comments t… Alexandru Petrescu
- Re: [Autoconf] RFC 5889 (Was: Call for comments t… Dearlove, Christopher (UK)
- Re: [Autoconf] RFC 5889 (Was: Call for comments t… Alexandru Petrescu
- Re: [Autoconf] RFC 5889 (Was: Call for comments t… Dearlove, Christopher (UK)
- Re: [Autoconf] RFC 5889 (Was: Call for comments t… Ulrich Herberg
- Re: [Autoconf] RFC 5889 (Was: Call for comments t… Alexandru Petrescu
- Re: [Autoconf] RFC 5889 (Was: Call for comments t… Dearlove, Christopher (UK)
- Re: [Autoconf] RFC 5889 (Was: Call for comments t… Alexandru Petrescu
- Re: [Autoconf] RFC 5889 (Was: Call for comments t… Alexandru Petrescu
- Re: [Autoconf] RFC 5889 (Was: Call for comments t… Alexandru Petrescu
- Re: [Autoconf] RFC 5889 (Was: Call for comments t… Thomas Heide Clausen
- Re: [Autoconf] RFC 5889 (Was: Call for comments t… Alexandru Petrescu
- Re: [Autoconf] RFC 5889 (Was: Call for comments t… Thomas Heide Clausen
- Re: [Autoconf] RFC 5889 (Was: Call for comments t… Alexandru Petrescu
- Re: [Autoconf] RFC 5889 (Was: Call for comments t… Dearlove, Christopher (UK)
- Re: [Autoconf] RFC 5889 (Was: Call for comments t… Alexandru Petrescu
- Re: [Autoconf] RFC 5889 (Was: Call for comments t… Dearlove, Christopher (UK)
- Re: [Autoconf] RFC 5889 (Was: Call for comments t… Dearlove, Christopher (UK)
- Re: [Autoconf] RFC 5889 (Was: Call for comments t… Alexandru Petrescu
- Re: [Autoconf] RFC 5889 (Was: Call for comments t… Alexandru Petrescu
- Re: [Autoconf] RFC 5889 (Was: Call for comments t… Alexandru Petrescu
- Re: [Autoconf] RFC 5889 (Was: Call for comments t… Dearlove, Christopher (UK)
- Re: [Autoconf] RFC 5889 (Was: Call for comments t… Teco Boot
- Re: [Autoconf] RFC 5889 (Was: Call for comments t… Alexandru Petrescu
- Re: [Autoconf] RFC 5889 (Was: Call for comments t… Henning Rogge
- Re: [Autoconf] RFC 5889 (Was: Call for comments t… Alexandru Petrescu
- Re: [Autoconf] RFC 5889 (Was: Call for comments t… Alexandru Petrescu
- Re: [Autoconf] RFC 5889 (Was: Call for comments t… Henning Rogge
- Re: [Autoconf] RFC 5889 (Was: Call for comments t… Alexandru Petrescu
- Re: [Autoconf] RFC 5889 (Was: Call for comments t… Thomas Heide Clausen
- Re: [Autoconf] RFC 5889 (Was: Call for comments t… Henning Rogge
- Re: [Autoconf] RFC 5889 (Was: Call for comments t… Ulrich Herberg
- Re: [Autoconf] RFC 5889 (Was: Call for comments t… Alexandru Petrescu
- Re: [Autoconf] RFC 5889 (Was: Call for comments t… Alexandru Petrescu
- Re: [Autoconf] RFC 5889 (Was: Call for comments t… Thomas Heide Clausen
- Re: [Autoconf] RFC 5889 (Was: Call for comments t… Thomas Heide Clausen
- Re: [Autoconf] RFC 5889 (Was: Call for comments t… Alexandru Petrescu
- Re: [Autoconf] RFC 5889 (Was: Call for comments t… Alexandru Petrescu
- Re: [Autoconf] RFC 5889 (Was: Call for comments t… Dearlove, Christopher (UK)
- Re: [Autoconf] RFC 5889 (Was: Call for comments t… Dearlove, Christopher (UK)
- Re: [Autoconf] RFC 5889 (Was: Call for comments t… Dearlove, Christopher (UK)
- Re: [Autoconf] RFC 5889 (Was: Call for comments t… Dearlove, Christopher (UK)
- Re: [Autoconf] RFC 5889 (Was: Call for comments t… Alexandru Petrescu
- Re: [Autoconf] RFC 5889 (Was: Call for comments t… Alexandru Petrescu
- Re: [Autoconf] RFC 5889 (Was: Call for comments t… Alexandru Petrescu
- Re: [Autoconf] RFC 5889 (Was: Call for comments t… Alexandru Petrescu
- Re: [Autoconf] RFC 5889 (Was: Call for comments t… Dearlove, Christopher (UK)
- Re: [Autoconf] RFC 5889 (Was: Call for comments t… Alexandru Petrescu
- Re: [Autoconf] RFC 5889 (Was: Call for comments t… Alexandru Petrescu
- Re: [Autoconf] RFC 5889 (Was: Call for comments t… Alexandru Petrescu
- Re: [Autoconf] RFC 5889 (Was: Call for comments t… Alexandru Petrescu
- Re: [Autoconf] RFC 5889 (Was: Call for comments t… Henning Rogge
- Re: [Autoconf] RFC 5889 (Was: Call for comments t… Teco Boot
- Re: [Autoconf] RFC 5889 (Was: Call for comments t… Teco Boot
- Re: [Autoconf] RFC 5889 (Was: Call for comments t… Alexandru Petrescu
- Re: [Autoconf] RFC 5889 (Was: Call for comments t… Erik Nordmark
- Re: [Autoconf] RFC 5889 Erik Nordmark
- [Autoconf] Forgot one [Was: RFC 5889 Erik Nordmark
- Re: [Autoconf] RFC 5889 Dearlove, Christopher (UK)
- Re: [Autoconf] RFC 5889 Erik Nordmark
- Re: [Autoconf] Forgot one [Was: RFC 5889 Erik Nordmark
- Re: [Autoconf] Forgot one [Was: RFC 5889 Dearlove, Christopher (UK)
- Re: [Autoconf] what's a router Henning Rogge
- [Autoconf] WC consensus call for RFC5889 modifica… Ryuji Wakikawa
- Re: [Autoconf] WC consensus call for RFC5889 modi… Jari Arkko
- Re: [Autoconf] WC consensus call for RFC5889 modi… Charles E. Perkins
- Re: [Autoconf] WC consensus call for RFC5889 modi… Henning Rogge
- Re: [Autoconf] WC consensus call for RFC5889 modi… Henning Rogge
- Re: [Autoconf] WC consensus call for RFC5889 modi… Charles E. Perkins
- Re: [Autoconf] WC consensus call for RFC5889 modi… Henning Rogge
- Re: [Autoconf] WC consensus call for RFC5889 modi… Teco Boot
- Re: [Autoconf] WC consensus call for RFC5889 modi… Teco Boot
- Re: [Autoconf] WC consensus call for RFC5889 modi… Alexandru Petrescu
- Re: [Autoconf] WC consensus call for RFC5889 modi… Teco Boot
- Re: [Autoconf] WC consensus call for RFC5889 modi… Charles E. Perkins
- Re: [Autoconf] WC consensus call for RFC5889 modi… Charles E. Perkins
- Re: [Autoconf] WC consensus call for RFC5889 modi… Teco Boot
- Re: [Autoconf] WC consensus call for RFC5889 modi… Charles E. Perkins
- Re: [Autoconf] WC consensus call for RFC5889 modi… Teco Boot
- Re: [Autoconf] WC consensus call for RFC5889 modi… Charles E. Perkins
- Re: [Autoconf] WC consensus call for RFC5889 modi… Teco Boot
- Re: [Autoconf] WC consensus call for RFC5889 modi… Henning Rogge
- Re: [Autoconf] WC consensus call for RFC5889 modi… Dearlove, Christopher (UK)
- Re: [Autoconf] what's a router (was: WC consensus… Alexandru Petrescu
- Re: [Autoconf] what's a router (was: WC consensus… Henning Rogge
- Re: [Autoconf] what's a router Alexandru Petrescu
- Re: [Autoconf] WC consensus call for RFC5889 modi… Emmanuel Baccelli
- Re: [Autoconf] what's a router Alexandru Petrescu
- Re: [Autoconf] what's a router Teco Boot
- Re: [Autoconf] what's a router Henning Rogge
- Re: [Autoconf] what's a router (was: WC consensus… Ulrich Herberg
- Re: [Autoconf] what's a router (was: WC consensus… Teco Boot
- Re: [Autoconf] what's a router Alexandru Petrescu
- Re: [Autoconf] what's a router Alexandru Petrescu
- Re: [Autoconf] what's a router Rogge Henning
- Re: [Autoconf] what's a router Alexandru Petrescu
- Re: [Autoconf] what's a router Alexandru Petrescu
- Re: [Autoconf] what's a router Alexandru Petrescu
- Re: [Autoconf] WC consensus call for RFC5889 modi… Alexandru Petrescu
- Re: [Autoconf] what's a router Teco Boot
- Re: [Autoconf] WC consensus call for RFC5889 modi… Charles E. Perkins
- Re: [Autoconf] WC consensus call for RFC5889 modi… Charles E. Perkins
- Re: [Autoconf] WC consensus call for RFC5889 modi… Charles E. Perkins
- Re: [Autoconf] WC consensus call for RFC5889 modi… Thomas Heide Clausen
- Re: [Autoconf] WC consensus call for RFC5889 modi… Charles E. Perkins
- Re: [Autoconf] WC consensus call for RFC5889 modi… Thomas Heide Clausen
- Re: [Autoconf] WC consensus call for RFC5889 modi… Emmanuel Baccelli
- Re: [Autoconf] WC consensus call for RFC5889 modi… Charles E. Perkins
- Re: [Autoconf] WC consensus call for RFC5889 modi… Emmanuel Baccelli
- Re: [Autoconf] WC consensus call for RFC5889 modi… Emmanuel Baccelli