Re: [manet] Reactive Protocol Situation
Philip Levis <pal@cs.stanford.edu> Thu, 01 November 2012 16:45 UTC
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From: Philip Levis <pal@cs.stanford.edu>
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To: "Dearlove, Christopher (UK)" <chris.dearlove@baesystems.com>
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Subject: Re: [manet] Reactive Protocol Situation
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On Nov 1, 2012, at 9:27 AM, Dearlove, Christopher (UK) wrote: > They can be good evidence of the failure of protocols ;) > > But what is clear to me is that one important issue (and another of my posts is attempting to both be more precise, as well as going elsewhere) is the handling of unidirectional links. So any good evidence needs to consider those. Since communication in wireless is rarely binary, I think the more common term is asymmetric links. I'm confused; I don't believe that unit disc models capture asymmetric links. Is the implied statement that RPL doesn't properly handle asymmetric links but LOADng does? I think this came up in draft-clausen-lln-rpl-experiences and there was some discussion on the ROLL list about it. The neighbor set in RPL is defined in 8.2.1: "First, the candidate neighbor set is a subset of the nodes that can be reached via link-local multicast." then in DIO processing (8.2.3.1) it reads: "As DIO messages are received from candidate neighbors, the neighbors may be promoted to DODAG parents by following the rules of DODAG discovery as described in Section 8.2." I want to be clear here; I haven't read deeply about LOADng, thought about it much, or experimented with it at all. So I have zero to say about LOADng's strengths and weaknesses. But just because somebody publishes (and republishes) a draft saying something doesn't mean it's true. There are, in my opinion, some very valid points in draft-clausen-lln-rpl-experiences that relate to fundamental design decisions in RPL. For example, I think that the issues raised about the state requirements of floating DODAGs and RPL message fragmentation are valid and reasonable and something we need to look at. However, there are others that are the result of naive mistakes anyone can make when implementing any wireless routing protocol, such as link asymmetry and protocol convergence. Unfortunately the draft doesn't distinguish the two. Implementing a protocol poorly then saying it doesn't work isn't particularly meaningful. As I said in Paris, I thought the draft is valuable because it outlines many of the basic mistakes one makes the first time you try implementing a wireless routing protocol. Phil
- [manet] Reactive Protocol Situation Joseph Macker
- Re: [manet] Reactive Protocol Situation Ulrich Herberg
- Re: [manet] Reactive Protocol Situation Timothy J. Salo
- Re: [manet] Reactive Protocol Situation Ulrich Herberg
- Re: [manet] Reactive Protocol Situation Charles E. Perkins
- Re: [manet] Reactive Protocol Situation Axel Colin de Verdière
- Re: [manet] Reactive Protocol Situation Bo Berry
- Re: [manet] Reactive Protocol Situation JP Vasseur (jvasseur)
- Re: [manet] Reactive Protocol Situation JP Vasseur (jvasseur)
- Re: [manet] Reactive Protocol Situation JP Vasseur (jvasseur)
- Re: [manet] URGENT -- Fwd: Reactive Protocol Situ… Pascal Thubert (pthubert)
- Re: [manet] Reactive Protocol Situation C Chauvenet
- Re: [manet] Reactive Protocol Situation Teco Boot
- Re: [manet] Reactive Protocol Situation Dearlove, Christopher (UK)
- Re: [manet] Reactive Protocol Situation C Chauvenet
- Re: [manet] Reactive Protocol Situation Dearlove, Christopher (UK)
- Re: [manet] Reactive Protocol Situation Dearlove, Christopher (UK)
- Re: [manet] URGENT -- Fwd: Reactive Protocol Situ… C Chauvenet
- Re: [manet] Reactive Protocol Situation Jiazi YI
- Re: [manet] Reactive Protocol Situation C Chauvenet
- Re: [manet] Reactive Protocol Situation Dearlove, Christopher (UK)
- Re: [manet] Reactive Protocol Situation JP Vasseur (jvasseur)
- Re: [manet] Reactive Protocol Situation Thierry LYS
- Re: [manet] Reactive Protocol Situation Dearlove, Christopher (UK)
- Re: [manet] Reactive Protocol Situation Dearlove, Christopher (UK)
- Re: [manet] Reactive Protocol Situation Ulrich Herberg
- Re: [manet] Reactive Protocol Situation Dowdell, John
- Re: [manet] Reactive Protocol Situation JP Vasseur (jvasseur)
- Re: [manet] Reactive Protocol Situation JP Vasseur (jvasseur)
- Re: [manet] Reactive Protocol Situation JP Vasseur (jvasseur)
- Re: [manet] Reactive Protocol Situation JP Vasseur (jvasseur)
- Re: [manet] Reactive Protocol Situation JP Vasseur (jvasseur)
- Re: [manet] Reactive Protocol Situation JP Vasseur (jvasseur)
- Re: [manet] Reactive Protocol Situation JP Vasseur (jvasseur)
- Re: [manet] Reactive Protocol Situation Ulrich Herberg
- Re: [manet] Reactive Protocol Situation Jon Black
- Re: [manet] Reactive Protocol Situation JP Vasseur (jvasseur)
- Re: [manet] Reactive Protocol Situation Jon Black
- Re: [manet] Reactive Protocol Situation Jiazi YI
- Re: [manet] Reactive Protocol Situation Dearlove, Christopher (UK)
- Re: [manet] Reactive Protocol Situation Dearlove, Christopher (UK)
- Re: [manet] Reactive Protocol Situation Jon Black
- Re: [manet] Reactive Protocol Situation Dearlove, Christopher (UK)
- Re: [manet] Reactive Protocol Situation Jon Black
- Re: [manet] Reactive Protocol Situation Joseph Macker
- Re: [manet] Reactive Protocol Situation Bo Berry
- Re: [manet] Reactive Protocol Situation Charles E. Perkins
- Re: [manet] Reactive Protocol Situation Axel Colin de Verdière
- Re: [manet] Reactive Protocol Situation JP Vasseur (jvasseur)
- Re: [manet] Reactive Protocol Situation JP Vasseur (jvasseur)
- Re: [manet] Reactive Protocol Situation JP Vasseur (jvasseur)
- Re: [manet] Reactive Protocol Situation JP Vasseur (jvasseur)
- Re: [manet] Reactive Protocol Situation Axel Colin de Verdière
- Re: [manet] Reactive Protocol Situation JP Vasseur (jvasseur)
- Re: [manet] Reactive Protocol Situation Timothy J. Salo
- Re: [manet] Reactive Protocol Situation Abdussalam Baryun
- Re: [manet] Reactive Protocol Situation Abdussalam Baryun
- Re: [manet] Reactive Protocol Situation Henning Rogge
- Re: [manet] Reactive Protocol Situation Abdussalam Baryun
- Re: [manet] Reactive Protocol Situation Abdussalam Baryun
- [manet] Reactive Protocol - LOADng vs. AODVv2 at … Don Sturek
- Re: [manet] Reactive Protocol Situation Abdussalam Baryun
- Re: [manet] Reactive Protocol Situation Joseph Macker
- Re: [manet] Reactive Protocol - LOADng vs. AODVv2… Joseph Macker
- Re: [manet] Reactive Protocol Situation Abdussalam Baryun
- Re: [manet] Reactive Protocol - LOADng vs. AODVv2… Abdussalam Baryun
- Re: [manet] Reactive Protocol Situation Jon Black
- Re: [manet] Reactive Protocol - LOADng vs. AODVv2… Ulrich Herberg
- Re: [manet] Reactive Protocol Situation Jon Black
- Re: [manet] Reactive Protocol - LOADng vs. AODVv2… Abdussalam Baryun
- Re: [manet] Reactive Protocol - LOADng vs. AODVv2… Jon Black
- Re: [manet] Reactive Protocol Situation Abdussalam Baryun
- Re: [manet] Reactive Protocol Situation Philip Levis
- Re: [manet] Reactive Protocol Situation Jon Black
- Re: [manet] Reactive Protocol Situation Philip Levis
- Re: [manet] Reactive Protocol Situation Dearlove, Christopher (UK)
- Re: [manet] Reactive Protocol Situation Don Sturek
- Re: [manet] Reactive Protocol Situation Philip Levis
- Re: [manet] Reactive Protocol Situation Don Sturek
- Re: [manet] Reactive Protocol Situation Daniel He
- Re: [manet] Reactive Protocol Situation Dearlove, Christopher (UK)
- Re: [manet] Reactive Protocol - LOADng vs. AODVv2… Daniel He
- Re: [manet] Reactive Protocol Situation Ulrich Herberg
- Re: [manet] Reactive Protocol - LOADng vs. AODVv2… Mukul Goyal
- Re: [manet] Reactive Protocol - LOADng vs. AODVv2… Dearlove, Christopher (UK)
- Re: [manet] Reactive Protocol - LOADng vs. AODVv2… Abdussalam Baryun
- Re: [manet] Reactive Protocol Situation Charles E. Perkins
- Re: [manet] Reactive Protocol Situation JP Vasseur (jvasseur)
- Re: [manet] Reactive Protocol Situation Don Sturek
- Re: [manet] Reactive Protocol Situation Jaudelice de Oliveira
- Re: [manet] Reactive Protocol Situation Ulrich Herberg
- Re: [manet] Reactive Protocol Situation JP Vasseur (jvasseur)
- Re: [manet] Reactive Protocol Situation JP Vasseur (jvasseur)
- Re: [manet] Reactive Protocol Situation JP Vasseur (jvasseur)
- Re: [manet] Reactive Protocol Situation JP Vasseur (jvasseur)
- Re: [manet] Reactive Protocol Situation Jiazi YI
- Re: [manet] Reactive Protocol Situation Abdussalam Baryun
- Re: [manet] Reactive Protocol Situation Abdussalam Baryun
- Re: [manet] Reactive Protocol Situation Stan Ratliff
- Re: [manet] Reactive Protocol Situation JP Vasseur (jvasseur)
- Re: [manet] Reactive Protocol Situation Abdussalam Baryun
- Re: [manet] Reactive Protocol Situation JP Vasseur (jvasseur)
- Re: [manet] Reactive Protocol Situation Abdussalam Baryun
- Re: [manet] Reactive Protocol Situation C Chauvenet
- Re: [manet] Reactive Protocol Situation Joydeep Tripathi
- Re: [manet] Reactive Protocol Situation Ulrich Herberg
- Re: [manet] Reactive Protocol Situation Philip Levis
- Re: [manet] Reactive Protocol Situation Jon Black
- Re: [manet] Reactive Protocol Situation Shoichi Sakane
- Re: [manet] Reactive Protocol Situation JP Vasseur (jvasseur)
- Re: [manet] Reactive Protocol Situation JP Vasseur (jvasseur)
- Re: [manet] Reactive Protocol Situation Jiazi YI
- Re: [manet] Reactive Protocol Situation C Chauvenet
- Re: [manet] Reactive Protocol Situation JP Vasseur (jvasseur)
- Re: [manet] Reactive Protocol Situation Dearlove, Christopher (UK)
- Re: [manet] Reactive Protocol Situation Teco Boot
- Re: [manet] Reactive Protocol Situation Abdussalam Baryun
- Re: [manet] Reactive Protocol Situation Martin Heusse
- Re: [manet] Reactive Protocol Situation Yuichi IGARASHI
- Re: [manet] Reactive Protocol Situation Ulrich Herberg
- Re: [manet] Reactive Protocol Situation JP Vasseur (jvasseur)
- Re: [manet] Reactive Protocol Situation JP Vasseur (jvasseur)
- Re: [manet] Reactive Protocol Situation JP Vasseur (jvasseur)
- Re: [manet] Reactive Protocol Situation Henning Rogge
- Re: [manet] Reactive Protocol Situation JP Vasseur (jvasseur)
- Re: [manet] Reactive Protocol Situation Henning Rogge
- Re: [manet] Reactive Protocol Situation JP Vasseur (jvasseur)
- Re: [manet] Reactive Protocol Situation Henning Rogge
- Re: [manet] Reactive Protocol Situation JP Vasseur (jvasseur)
- Re: [manet] Reactive Protocol Situation Jon Black
- Re: [manet] Reactive Protocol Situation Jon Black
- Re: [manet] Reactive Protocol Situation Jon Black
- Re: [manet] Reactive Protocol Situation Jon Black
- Re: [manet] Reactive Protocol Situation JP Vasseur (jvasseur)
- Re: [manet] Reactive Protocol Situation JP Vasseur (jvasseur)
- Re: [manet] Reactive Protocol Situation JP Vasseur (jvasseur)
- Re: [manet] Reactive Protocol Situation Joseph Macker
- Re: [manet] Reactive Protocol Situation JP Vasseur (jvasseur)
- Re: [manet] Reactive Protocol Situation Jon Black
- Re: [manet] Reactive Protocol Situation JP Vasseur (jvasseur)
- Re: [manet] Reactive Protocol Situation Jon Black
- Re: [manet] Reactive Protocol Situation Jon Black
- Re: [manet] Reactive Protocol Situation C Chauvenet
- Re: [manet] Reactive Protocol Situation JP Vasseur (jvasseur)
- Re: [manet] Reactive Protocol Situation Henning Rogge
- Re: [manet] Reactive Protocol Situation Jon Black
- Re: [manet] Reactive Protocol Situation Timothy J. Salo
- Re: [manet] Reactive Protocol Situation Timothy J. Salo
- Re: [manet] Reactive Protocol Situation Charles E. Perkins
- Re: [manet] Reactive Protocol Situation Stan Ratliff (sratliff)
- Re: [manet] Reactive Protocol Situation JP Vasseur (jvasseur)
- Re: [manet] Reactive Protocol Situation Philip Levis
- Re: [manet] Reactive Protocol Situation JP Vasseur (jvasseur)
- Re: [manet] Reactive Protocol Situation JP Vasseur (jvasseur)
- Re: [manet] Reactive Protocol Situation jpmacker
- Re: [manet] Reactive Protocol Situation Abdussalam Baryun
- Re: [manet] Reactive Protocol Situation JP Vasseur (jvasseur)