[Roll] No path DAO problem stmt draft

"Rahul Arvind Jadhav (Rahul Arvind Jadhav, 2012 Labs)" <rahul.jadhav@huawei.com> Wed, 02 March 2016 14:10 UTC

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From: "Rahul Arvind Jadhav (Rahul Arvind Jadhav, 2012 Labs)" <rahul.jadhav@huawei.com>
To: Routing Over Low power and Lossy networks <roll@ietf.org>
Thread-Topic: No path DAO problem stmt draft
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Date: Wed, 2 Mar 2016 14:04:05 +0000
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Subject: [Roll] No path DAO problem stmt draft
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Dear All,

We recently submitted a draft (https://tools.ietf.org/html/draft-jadhav-roll-no-path-dao-ps-00) stating problem statements pertaining to No Path DAO messaging in RPL spec.

The primary pain point that is highlighted is that the No-Path DAO messaging takes a path which has a higher probability of not been available. For e.g. when the node switches its parent, a No-Path DAO is usually generated along the path through the previous parent and the No-Path DAO traverses upwards always along that path. A path which is no longer a preferred path is used for No-Path DAO messaging and thus the probability of No-Path DAO messaging failure is high, resulting in stale routing entries.

Also there are other negative implications mentioned in the document because of this messaging mode.

The work drafts the problem statement and explains requirements from solution point of view.

Kindly feedback if the problem statement impacts you.


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