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[Roll] suggested addition to draft-ietf-roll-efficient-npdao

"Pascal Thubert (pthubert)" <pthubert@cisco.com> Fri, 30 August 2019 06:43 UTC

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From: "Pascal Thubert (pthubert)" <pthubert@cisco.com>
To: Routing Over Low power and Lossy networks <roll@ietf.org>
Thread-Topic: suggested addition to draft-ietf-roll-efficient-npdao
Thread-Index: AdVe/YcA7dtmnImrSGKYwVT3ZLHQqA==
Date: Fri, 30 Aug 2019 06:42:50 +0000
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Subject: [Roll] suggested addition to draft-ietf-roll-efficient-npdao
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Dear all ;

I know it's late but I'd suggest an addition to draft-ietf-roll-efficient-npdao. There's a reserved field in the DCO.
My suggestion is to use it to transport RPL DAO-ACK status values as defined in RFC 6550. This way we can signal the reason of the DCO to the node.
This will become significant with the RPL-unaware leaves draft, so we can rebuild a NA(EARO) with a non-zero status based on a DCO.

Else the RUL draft will have to update efficient NP DAO, which does not look as good.

Any objection to this?

Pascal

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