Re: [Roll] DIS-modifications use cases; Re: FW: New Version Notification for draft-ietf-roll-dis-modifications-01.txt

dominique.barthel@orange.com Fri, 06 March 2020 09:47 UTC

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From: <dominique.barthel@orange.com>
To: Routing Over Low power and Lossy networks <roll@ietf.org>
CC: Rahul Jadhav <rahul.ietf@gmail.com>, "Georgios Z. Papadopoulos" <georgios.papadopoulos@imt-atlantique.fr>
Thread-Topic: [Roll] DIS-modifications use cases; Re: FW: New Version Notification for draft-ietf-roll-dis-modifications-01.txt
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Date: Fri, 6 Mar 2020 09:47:19 +0000
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Subject: Re: [Roll] DIS-modifications use cases; Re: FW: New Version Notification for draft-ietf-roll-dis-modifications-01.txt
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Dear all,

The cut-off date for draft publication before IETF107 is Monday, approaching fast.
If you have requirements for new/different DIS behaviour, please let us know what they are, preferably before Monday noon CET.
You can write a description by email, or submit a Pull Request to the github repo indicated below.
We'll publish a draft on Monday so that we can discuss it at IETF107.
Best regards,

Dominique

De : "Georgios Z. Papadopoulos" <georgios.papadopoulos@imt-atlantique.fr<mailto:georgios.papadopoulos@imt-atlantique.fr>>
Date : Tuesday 3 March 2020 11:18
À : "roll@ietf.org<mailto:roll@ietf.org>" <roll@ietf.org<mailto:roll@ietf.org>>
Cc : Rahul Jadhav <rahul.ietf@gmail.com<mailto:rahul.ietf@gmail.com>>, Dominique Barthel <dominique.barthel@orange.com<mailto:dominique.barthel@orange.com>>
Objet : Re: [Roll] DIS-modifications use cases; Re: FW: New Version Notification for draft-ietf-roll-dis-modifications-01.txt

Dear all,

I just updated the repository with Rahul’s use-case “Adjacencies probing with RPL” : https://github.com/roll-wg/roll-dis-modifications-use-cases
Many thanks Rahul!

Please let me know if you have more use-cases in mind.

Thx,
Georgios


On Feb 25, 2020, at 08:43, dominique.barthel@orange.com<mailto:dominique.barthel@orange.com> wrote:

Hello Rahul, all,

Thanks, Rahul,  for your contribution, this is helpful!
WG, others ideas, comments?
Best regards

Dominique

De : Roll <roll-bounces@ietf.org<mailto:roll-bounces@ietf.org>> on behalf of Rahul Jadhav <rahul.ietf@gmail.com<mailto:rahul.ietf@gmail.com>>
Répondre à : "roll@ietf.org<mailto:roll@ietf.org>" <roll@ietf.org<mailto:roll@ietf.org>>
Date : Tuesday 25 February 2020 06:38
À : "roll@ietf.org<mailto:roll@ietf.org>" <roll@ietf.org<mailto:roll@ietf.org>>
Objet : Re: [Roll] DIS-modifications use cases; Re: FW: New Version Notification for draft-ietf-roll-dis-modifications-01.txt



On Mon, 24 Feb 2020 at 22:22, <dominique.barthel@orange.com<mailto:dominique.barthel@orange.com>> wrote:
Dear Rollers,

In preparation for the modification of the DIS (DODAG Information
Solicitation), we are collecting the use cases.
We want to make sure we understand all the requirements before crafting a
solution.
Georgios has kindly prepared a document on the ROLL GitHub repo.
See a text rendition at
https://github.com/roll-wg/roll-dis-modifications-use-cases/blob/master/dra
ft-papadopoulos-roll-dis-modifications-use-cases.txt<https://github.com/roll-wg/roll-dis-modifications-use-cases/blob/master/draft-papadopoulos-roll-dis-modifications-use-cases.txt>

[RJ] Thanks Georgios. This surely helps. I am assuming that the use-cases text will get merged in the dis-modifications draft.
One point mentioned in the use-cases draft is that unicast DIS can request __specific__ metric information from the parent. Currently, the parent sends the complete metric set to the child using unicast DIO. Wondering whether we need this mechanism for sending specific metric info back to the child node. The draft does not give a use-case for this. Anyways, this would be discussed when the drafts get merged and sent to the group.

Currently, the document has two use cases:
- a new node joins an established RPL network. The use case calls for a
fairly quick confirmation that the node has joined with a good quality
path. However, we don't want to reset the Trickle timers of all nearby
routers and trigger broadcast, since the use case is that just one new
node was added/replaced/rebooted.
- another use case is that several nodes join at about the same time (e.g.
electricity meters all reboot following power outage). We want the DIOs to
be sent with broadcast so that all joining nodes benefit from them.
The draft draft-thubert-roll-eliding-dio-information-03 has another
request for modifying the DIS. We'll soon incorporate it into the use
cases document.

[RJ] Another use-case is of "adjacency probing". While (I believe) no new primitives need to be added, still the use-case is well-worth mentioning. The RPL-observations draft points to this use-case and you can pick some text from there.


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