Re: [Roll] Add ROVR in DAO?

Michael Richardson <mcr+ietf@sandelman.ca> Mon, 26 August 2019 16:31 UTC

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From: Michael Richardson <mcr+ietf@sandelman.ca>
To: Routing Over Low power and Lossy networks <roll@ietf.org>
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Date: Mon, 26 Aug 2019 12:31:36 -0400
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Subject: Re: [Roll] Add ROVR in DAO?
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Pascal Thubert (pthubert) <pthubert@cisco.com> wrote:
    > Note that I do not know how to avoid keeping what we have in unaware
    > leaves today, that is the flow from the 6LR without a ROVR, and the
    > problem is as usual backward compatibility.

I'll need to spend some time with some flows in front of me to understand the conflict.
unaware leaves is not done, and not deployed, so can we just change it now
then?
It's a bit of a mirky swirl of time sequence diagrams for me right now.

    > We have to chose between yet another flag day / configuration bit
    > approach or to live with the keep alive as already described with no
    > ROVR as an option.

    > There's also the problem of knowing whether the 6LBR supports the keep
    > alive with no ROVR. That will need to be signaled.

I feel there is a combinatorics of options here, and not a lot of ability to
communicate them to RULs.   Let's get the end point well described, and
figure out if there are in fact way points in the middle which are worth
while describing?

--
Michael Richardson <mcr+IETF@sandelman.ca>, Sandelman Software Works
 -= IPv6 IoT consulting =-