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 <[email protected]> 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
> <[email protected]> wrote:
>> 
>> Thomas Watteyne <[email protected]> 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 <[email protected]>, Sandelman Software Works
>> -= IPv6 IoT consulting =-
>> 
>> 
>> 
> 
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