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Re: [Roll] DAO Projection

"Pascal Thubert (pthubert)" <pthubert@cisco.com> Tue, 14 March 2017 07:35 UTC

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From: "Pascal Thubert (pthubert)" <pthubert@cisco.com>
To: Michael Richardson <mcr+ietf@sandelman.ca>, Routing Over Low power and Lossy networks <roll@ietf.org>
Thread-Topic: [Roll] DAO Projection
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Date: Tue, 14 Mar 2017 07:34:43 +0000
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Cc: "draft-ietf-roll-dao-projection@ietf.org" <draft-ietf-roll-dao-projection@ietf.org>
Subject: Re: [Roll] DAO Projection
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A good point to discuss at the meeting Michael.

In non-storing mode, the root has the DODAG topology, and we can extend the metrics containers to add node capabilities.

OTOH, in storing and for transversal routes in general, we are lacking means to provide the needed topological and node capabilities information, and the draft currently expects external means, such as YANG/TEAS. 

All in all, the question is whether we extend non storing DAOs in all cases, or define a new communication to the root.

That's probably a good thing to discuss at the meeting in Chicago.

Take care,

Pascal


-----Original Message-----
From: Michael Richardson [mailto:mcr+ietf@sandelman.ca] 
Sent: lundi 13 mars 2017 20:39
To: Routing Over Low power and Lossy networks <roll@ietf.org>
Cc: draft-ietf-roll-dao-projection@ietf.org
Subject: Re: [Roll] DAO Projection


Pascal Thubert (pthubert) <pthubert@cisco.com> wrote:
    > 3) At the moment, the draft allows to mix any form of P-DAO (Storing vs
    > non storing) with any mode of RPL. We need to discuss if that flies or
    > not.

If this permits the root to learn which nodes support P-DAO, and networks can do incremental upgrades, that's a win to me.

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

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