Re: [6tisch] [6lo] Proposed improvement in RH3-6LoRH
Simon Duquennoy <simonduq@sics.se> Wed, 20 January 2016 13:33 UTC
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Date: Wed, 20 Jan 2016 14:33:30 +0100
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From: Simon Duquennoy <simonduq@sics.se>
To: "Pascal Thubert (pthubert)" <pthubert@cisco.com>
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Cc: Michael Richardson <mcr+ietf@sandelman.ca>, "6tisch@ietf.org" <6tisch@ietf.org>, Routing Over Low power and Lossy networks <roll@ietf.org>, "Tengfei Chang (tengfei.chang@gmail.com)" <tengfei.chang@gmail.com>, "6lo@ietf.org" <6lo@ietf.org>
Subject: Re: [6tisch] [6lo] Proposed improvement in RH3-6LoRH
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Will do, talk to you on Friday! Thanks, Simon Le 20 janv. 2016 09:14, "Pascal Thubert (pthubert)" <pthubert@cisco.com> a écrit : > Cool > > Let us update the agenda to make more room then. > > Could you please prepare a slide or 2 illustrating what the problem is? > > Also I'd like to provide examples at the call. If you have some that > illustrate your issues please send them on the lists so I can provide the > 6lorh form to compare. > > Thanks a bunch Simon! > > Pascal > > > Le 20 janv. 2016 à 09:08, Simon Duquennoy <simonduq@sics.se> a écrit : > > > > Yes let me participate to the next 6TiSCH interim. I'll be also at the > plugtest. > > Will be much easier over voice ;) > > Thanks, > > Simon > > > > > > On Wed, Jan 20, 2016 at 8:54 AM, Pascal Thubert (pthubert) > > <pthubert@cisco.com> wrote: > >> Our messages crossed, Simon. > >> > >>> - IPv6 stack interacting with the adaptation layer > >> > >> I'm not sure I agree with that (see my other mail), but if you're > correct I really what to dig that and fix it. Please read the other email > I just sent and if you still see that the mapping is not there then please > refine what the issue is exactly. > >> > >> > >>> - No one-to-one mapping between a RH3-6LoRH and a RH3 > >> > >> We can reconstruct an RH0 form from RH3 and from RH3-6LoRH, and > recompress an RH0 into both as well. I fail to see what the problem is > though I do hope that implementations never need to play that game. When > the packet goes up the stack, the RH3-6LoRH should be gone, removed by the > last router (which may be collocated). > >> > >> Would you be willing to participate to the next 6TiSCH interim? We'll > discuss that topic since it impacts the plugtest. > >> > >> Cheers, > >> > >> Pascal > >> > >> > >>> -----Original Message----- > >>> From: simon.duquennoy@gmail.com [mailto:simon.duquennoy@gmail.com] > >>> On Behalf Of Simon Duquennoy > >>> Sent: mercredi 20 janvier 2016 08:44 > >>> To: Michael Richardson <mcr+ietf@sandelman.ca> > >>> Cc: Pascal Thubert (pthubert) <pthubert@cisco.com>; 6tisch@ietf.org; > >>> Routing Over Low power and Lossy networks <roll@ietf.org>; Tengfei > Chang > >>> <tengfei.chang@gmail.com>; 6lo@ietf.org > >>> Subject: Re: [6tisch] [6lo] Proposed improvement in RH3-6LoRH > >>> > >>> Right, I'm using the wrong wording, I counted RFC6554 as RPL, sorry > for the > >>> confusion. > >>> > >>> What I don't like: > >>> - IPv6 stack interacting with the adaptation layer > >>> - No one-to-one mapping between a RH3-6LoRH and a RH3 > >>> > >>> If I'm not mistaken, everything else in 6lowpan offers this one-to-one > >>> mapping, and that allows the IPv6 stack to work independently of > 6lowpan > >>> (i.e. the same stack runs both in 6lowpan environment or not). > >>> I also find this property nice, conceptually, as one can produce any > >>> IPv6 packet and easily derive its compressed form, and back. One header > >>> maps to one compressed header with all its fields compressed, etc. > >>> > >>> If I'm the only one to think this is an issue, I'm ready to close the > issue. > >>> > >>> Thanks, > >>> Simon > >>> > >>> > >>> On Tue, Jan 19, 2016 at 11:06 PM, Michael Richardson > >>> <mcr+ietf@sandelman.ca> wrote: > >>>> > >>>> Simon Duquennoy <simonduq@sics.se> wrote: > >>>>> Not really. It was rather my view of the architecture that differs a > >>>>> bit from what you describe in your previous mail. > >>>> > >>>> okay. > >>>> > >>>>> For me RPL produces the RH3 and then passes the packet down the > >>> stack > >>>>> for compression. Or for incoming packets, first there is > >>>>> decompression, then the IPv6 packet with its headers and extension > >>>>> headers are passed up to RPL etc. If find it odd to force upper > layers > >>>>> to work on 6lowpan compressed formats. > >>>> > >>>> RPL is the thing in RFC6550, a routing protocol, that runs over ICMP > ND > >>> messages. > >>>> > >>>> I think the thing you are describing is the IPv6 stack, and you don't > >>>> like that the IPv6 stack has to interact with the link adaptation > layer. > >>>> > >>>> -- > >>>> Michael Richardson <mcr+IETF@sandelman.ca>, Sandelman Software > >>> Works > >>>> IETF ROLL WG co-chair. > http://datatracker.ietf.org/wg/roll/charter/ > >>>> >
- [6tisch] Proposed improvement in RH3-6LoRH Pascal Thubert (pthubert)
- Re: [6tisch] Proposed improvement in RH3-6LoRH Tengfei Chang
- Re: [6tisch] Proposed improvement in RH3-6LoRH Pascal Thubert (pthubert)
- Re: [6tisch] Proposed improvement in RH3-6LoRH Tengfei Chang
- Re: [6tisch] [6lo] Proposed improvement in RH3-6L… Simon Duquennoy
- Re: [6tisch] [6lo] Proposed improvement in RH3-6L… Pascal Thubert (pthubert)
- Re: [6tisch] Proposed improvement in RH3-6LoRH Pascal Thubert (pthubert)
- Re: [6tisch] [6lo] Proposed improvement in RH3-6L… Simon Duquennoy
- Re: [6tisch] [6lo] Proposed improvement in RH3-6L… Michael Richardson
- Re: [6tisch] [6lo] Proposed improvement in RH3-6L… Simon Duquennoy
- Re: [6tisch] [6lo] Proposed improvement in RH3-6L… Pascal Thubert (pthubert)
- Re: [6tisch] [6lo] Proposed improvement in RH3-6L… Pascal Thubert (pthubert)
- Re: [6tisch] [6lo] Proposed improvement in RH3-6L… Simon Duquennoy
- Re: [6tisch] [6lo] Proposed improvement in RH3-6L… Michael Richardson
- Re: [6tisch] [6lo] Proposed improvement in RH3-6L… Michael Richardson
- Re: [6tisch] [6lo] Proposed improvement in RH3-6L… Simon Duquennoy
- Re: [6tisch] [6lo] Proposed improvement in RH3-6L… Michael Richardson
- Re: [6tisch] [6lo] Proposed improvement in RH3-6L… Simon Duquennoy
- Re: [6tisch] [6lo] Proposed improvement in RH3-6L… Pascal Thubert (pthubert)
- Re: [6tisch] [6lo] Proposed improvement in RH3-6L… Pascal Thubert (pthubert)
- Re: [6tisch] [6lo] Proposed improvement in RH3-6L… Simon Duquennoy
- Re: [6tisch] [6lo] Proposed improvement in RH3-6L… Pascal Thubert (pthubert)
- Re: [6tisch] [6lo] Proposed improvement in RH3-6L… Simon Duquennoy
- Re: [6tisch] Proposed improvement in RH3-6LoRH Pascal Thubert (pthubert)
- Re: [6tisch] [6lo] Proposed improvement in RH3-6L… Ralph Droms
- Re: [6tisch] [6lo] Proposed improvement in RH3-6L… Pascal Thubert (pthubert)
- Re: [6tisch] Proposed improvement in RH3-6LoRH S.V.R.Anand
- Re: [6tisch] Proposed improvement in RH3-6LoRH Pascal Thubert (pthubert)
- Re: [6tisch] Proposed improvement in RH3-6LoRH : … S.V.R.Anand