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[Roll] unaware leaves - graceful shutdown of attached-6LR

Rahul Jadhav <nyrahul@outlook.com> Mon, 13 April 2020 13:06 UTC

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From: Rahul Jadhav <nyrahul@outlook.com>
To: Routing Over Low power and Lossy networks <roll@ietf.org>
Thread-Topic: unaware leaves - graceful shutdown of attached-6LR
Thread-Index: AQHWEZQvbgNuDRZQpEGmjIYHLkz6MA==
Date: Mon, 13 Apr 2020 13:06:29 +0000
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Subject: [Roll] unaware leaves - graceful shutdown of attached-6LR
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Hello Pascal/Authors,

In the event that the attached 6LR needs to gracefully shutdown, it needs to inform the RUL(s) to detach and possibly move to another 6LR.
I believe this could be done using NA(EARO, Status="Removed"); from the attached-6LR. Can this NA be multicasted if the attached-6LR has more than one RULs attached to it?
Is this correct/allowed? For RPL we have route-poisoning using which a 6LR does a graceful shutdown, but the route-poisoning is not applicable to RULs. I believe this should be clarified in the text.

Regards,
Rahul

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