Simon, I understand your point now. Carsten, I understand your proposal, but given the text of RFC8025, we did not choose to omit the page switch byte.
On Wed, Jul 5, 2017 at 1:03 PM, Simon Duquennoy <simon.duquen...@inria.fr> wrote: > That would make sense and save a byte in all cases but is this > compliant with RFC 8025?" > > " > Values of the Dispatch byte defined in [RFC4944] are considered as > belonging to the Page 0 parsing context, which is the default and > does not need to be signaled explicitly at the beginning of a 6LoWPAN > packet. This ensures backward compatibility with existing > implementations of 6LoWPAN. > " > > On Wed, Jul 5, 2017 at 12:50 PM, Carsten Bormann <c...@tzi.org> wrote: > > You indeed don’t need page 1 for IPHC. > > You need to be on page 1 once you need 6LoRH. > > > > (My proposal was to simply define 6TiSCH to start in page 1. No idea > whether that removes any ever-so-remote compatibility with 6LoWPAN or if > there is any other reason to start off in page 0.) > > > > Grüße, Carsten > > > > > >> On Jul 5, 2017, at 12:02, Simon Duquennoy <simon.duquen...@inria.fr> > wrote: > >> > >> In Thomas' example > >> https://tools.ietf.org/html/draft-munoz-6tisch-examples- > 00#section-3.6.1 > >> there is a page dispatch to page 1 (0xf1) followed by IPHC (no routing > >> header). In this case, couldn't one choose to elide the page dispatch > >> and directly include IPHC? Or is the IPHC different from a page 0 > >> IPHC? > >> Just checking if we're on the same page (no pun intended ;)) > >> > >> Thanks, > >> Simon > >> > >> > >> On Wed, Jun 28, 2017 at 1:41 AM, Michael Richardson > >> <mcr+i...@sandelman.ca> wrote: > >>> > >>> Thomas Watteyne <thomas.watte...@inria.fr> wrote: > >>>> Simon, all, FYI, we agreed on Friday that using paging dispatch is the > >>>> right way forward. I propose we continue discussing on the plugtests > >>>> ML if that's going to create problems. > >>> > >>> Yes, but the point is that a non-6loRH node will not be able to decode > other > >>> than "page 1", and we have no signaling mechanism to tell a 6loRH node > to > >>> "fall back". > >>> > >>> That was intentional... We discussed having a flag in the RPL DIO to > say if > >>> there were old nodes present, but decided it wasn't worth it. > >>> > >>> > >>> -- > >>> Michael Richardson <mcr+i...@sandelman.ca>, Sandelman Software Works > >>> -= IPv6 IoT consulting =- > >>> > >>> > >>> > >> > >> _______________________________________________ > >> 6tisch mailing list > >> 6tisch@ietf.org > >> https://www.ietf.org/mailman/listinfo/6tisch > >> > > > -- _______________________________________ Thomas Watteyne, PhD Research Scientist & Innovator, Inria Sr Networking Design Eng, Linear Tech Founder & co-lead, UC Berkeley OpenWSN Co-chair, IETF 6TiSCH www.thomaswatteyne.com _______________________________________
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