Re: [Roll] Benjamin Kaduk's Discuss on draft-ietf-roll-turnon-rfc8138-14: (with DISCUSS and COMMENT)
Michael Richardson <mcr+ietf@sandelman.ca> Sat, 12 September 2020 17:51 UTC
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From: Michael Richardson <mcr+ietf@sandelman.ca>
To: Routing Over Low power and Lossy networks <roll@ietf.org>
cc: Benjamin Kaduk <kaduk@mit.edu>, "roll-chairs@ietf.org" <roll-chairs@ietf.org>, Ines Robles <mariainesrobles@googlemail.com>, "draft-ietf-roll-turnon-rfc8138@ietf.org" <draft-ietf-roll-turnon-rfc8138@ietf.org>, The IESG <iesg@ietf.org>, Alvaro Retana <aretana.ietf@yahoo.com>
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Date: Sat, 12 Sep 2020 13:42:44 -0400
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Subject: Re: [Roll] Benjamin Kaduk's Discuss on draft-ietf-roll-turnon-rfc8138-14: (with DISCUSS and COMMENT)
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Pascal Thubert \(pthubert\) <pthubert=40cisco.com@dmarc.ietf.org> wrote: > Now I’m unsure Michael and I agree anymore. > What will today’s developer code? > We ask him to test if mop is < 7 > What value will the developer place in his code if the test returns > false? That's a good question. Pascal, it your intention that 8138 be turned on in this case? I'm not opposed to that conclusion, but I thought that the goal was to move the signaling to mopex/capabilities/TBD? Would there be cases in the future where ONLY 8138 compression would be coded? We have set the situation where if a node does not understand the MOP, it can be a leaf, but 8138 incompatibility makes that not work. > Leaving it to the implementation will have some people choose true and > others false. This is not what we want. > We want to control what the code does so we can expect it in the future > and build our backward compatibility based on that sure knowledge. > Before the draft the default was no compression. Quite naturally since > initially it did not exist. > Also we discussed on the ML that for RPLv2 all implementations MUST support the compression. Just consider that for some link layers, 8138 compression might not make sense. > In which case it is a better default for a coder today to decide to use > the compression for mop 7, isn’t it? > I hope I make the case right. Just think you’re coding it! We're assuming someone coding today. Someone who is not writing MOP=7 code, has no mopex or capabilities code, because we haven't defined that. We agree that the "T" flag does not exist, and should be checked. Such a node would be a leaf. I can live with defaulting 8138 to be on for MOP=7 for link layers for which 8138 is appropriate. (Someone coding today will know what link layers they have) -- Michael Richardson <mcr+IETF@sandelman.ca> . o O ( IPv6 IøT consulting ) Sandelman Software Works Inc, Ottawa and Worldwide
- [Roll] Benjamin Kaduk's Discuss on draft-ietf-rol… Benjamin Kaduk via Datatracker
- Re: [Roll] Benjamin Kaduk's Discuss on draft-ietf… Michael Richardson
- Re: [Roll] Benjamin Kaduk's Discuss on draft-ietf… Pascal Thubert (pthubert)
- Re: [Roll] Benjamin Kaduk's Discuss on draft-ietf… Benjamin Kaduk
- Re: [Roll] Benjamin Kaduk's Discuss on draft-ietf… Alvaro Retana
- Re: [Roll] Benjamin Kaduk's Discuss on draft-ietf… Benjamin Kaduk
- Re: [Roll] Benjamin Kaduk's Discuss on draft-ietf… Pascal Thubert (pthubert)
- Re: [Roll] Benjamin Kaduk's Discuss on draft-ietf… Pascal Thubert (pthubert)
- Re: [Roll] Benjamin Kaduk's Discuss on draft-ietf… Michael Richardson
- Re: [Roll] Benjamin Kaduk's Discuss on draft-ietf… Benjamin Kaduk
- Re: [Roll] Benjamin Kaduk's Discuss on draft-ietf… Pascal Thubert (pthubert)
- Re: [Roll] Benjamin Kaduk's Discuss on draft-ietf… Michael Richardson
- Re: [Roll] Benjamin Kaduk's Discuss on draft-ietf… Martin Duke
- Re: [Roll] Benjamin Kaduk's Discuss on draft-ietf… Alvaro Retana
- Re: [Roll] Benjamin Kaduk's Discuss on draft-ietf… Benjamin Kaduk
- Re: [Roll] Benjamin Kaduk's Discuss on draft-ietf… Benjamin Kaduk
- Re: [Roll] Benjamin Kaduk's Discuss on draft-ietf… Michael Richardson
- Re: [Roll] Benjamin Kaduk's Discuss on draft-ietf… Pascal Thubert (pthubert)
- Re: [Roll] Benjamin Kaduk's Discuss on draft-ietf… Pascal Thubert (pthubert)
- Re: [Roll] Benjamin Kaduk's Discuss on draft-ietf… Alvaro Retana
- Re: [Roll] Benjamin Kaduk's Discuss on draft-ietf… Pascal Thubert (pthubert)
- Re: [Roll] Benjamin Kaduk's Discuss on draft-ietf… Martin Duke
- Re: [Roll] Benjamin Kaduk's Discuss on draft-ietf… Alvaro Retana
- Re: [Roll] Benjamin Kaduk's Discuss on draft-ietf… Pascal Thubert (pthubert)
- Re: [Roll] Benjamin Kaduk's Discuss on draft-ietf… Martin Duke
- Re: [Roll] Benjamin Kaduk's Discuss on draft-ietf… Michael Richardson
- [Roll] Agenda for Monday (Re: MOP==7 live discuss… Michael Richardson
- Re: [Roll] Agenda for Monday (Re: MOP==7 live dis… Pascal Thubert (pthubert)
- Re: [Roll] Agenda for Monday (Re: MOP==7 live dis… Alvaro Retana
- Re: [Roll] Agenda for Monday (Re: MOP==7 live dis… Ines Robles
- Re: [Roll] Agenda for Monday (Re: MOP==7 live dis… Pascal Thubert (pthubert)
- Re: [Roll] Benjamin Kaduk's Discuss on draft-ietf… Pascal Thubert (pthubert)
- Re: [Roll] Benjamin Kaduk's Discuss on draft-ietf… Alvaro Retana
- Re: [Roll] Benjamin Kaduk's Discuss on draft-ietf… Pascal Thubert (pthubert)
- Re: [Roll] Benjamin Kaduk's Discuss on draft-ietf… Pascal Thubert (pthubert)
- Re: [Roll] Benjamin Kaduk's Discuss on draft-ietf… Benjamin Kaduk
- Re: [Roll] Benjamin Kaduk's Discuss on draft-ietf… Pascal Thubert (pthubert)
- Re: [Roll] Benjamin Kaduk's Discuss on draft-ietf… Martin Duke
- Re: [Roll] Benjamin Kaduk's Discuss on draft-ietf… Benjamin Kaduk
- Re: [Roll] Benjamin Kaduk's Discuss on draft-ietf… Pascal Thubert (pthubert)
- Re: [Roll] Benjamin Kaduk's Discuss on draft-ietf… Martin Duke
- Re: [Roll] Benjamin Kaduk's Discuss on draft-ietf… Michael Richardson
- Re: [Roll] Benjamin Kaduk's Discuss on draft-ietf… Pascal Thubert (pthubert)
- Re: [Roll] Benjamin Kaduk's Discuss on draft-ietf… Martin Duke
- Re: [Roll] Benjamin Kaduk's Discuss on draft-ietf… Michael Richardson
- Re: [Roll] Benjamin Kaduk's Discuss on draft-ietf… Martin Duke