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Re: [Roll] enrollment priority

Rahul Jadhav <rahul.ietf@gmail.com> Tue, 23 November 2021 03:35 UTC

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From: Rahul Jadhav <rahul.ietf@gmail.com>
Date: Tue, 23 Nov 2021 09:05:18 +0530
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To: Routing Over Low power and Lossy networks <roll@ietf.org>
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Subject: Re: [Roll] enrollment priority
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Hey Michael,

Please find my review of the updates inline in the github PR
<https://github.com/roll-wg/draft-ietf-roll-enrollment-priority/pull/9>.
Few other comments inline below.

Regards,
Rahul

On Mon, 22 Nov 2021 at 19:45, Michael Richardson <mcr+ietf@sandelman.ca>
wrote:

>
> I'm trying to edit draft-ietf-roll-enrollment-priority to reflect the WG
> consensus.
>
> I think that we agreed that the nodes within the DODAG should not change
> their enrollment priority.  It can be set by the root in it's DIO, and it
> will propogate through the DODAG according to the normal trickle settings.
> Changes to the priority will *not*(?!) reset the trickle timer.
>

Not resetting trickle timer has impact. It could take several hours for the
updated option to percolate downstream in the network. I just wanted to say
it loud here.


>
> https://github.com/roll-wg/draft-ietf-roll-enrollment-priority/pull/9 is
> the
> pull request I just made, which may be easier to see the changes.
>
> specifically, I've deleted this line:
>
>
> https://github.com/roll-wg/draft-ietf-roll-enrollment-priority/pull/9/files#diff-fe544a5ddaac2d404d7b76aa1204d54e36f5eb6618f3f52f0c0dc56dca4061faL169
>
>    The nodes then adjust this base value based upon their observed
>    congestion, emitting their adjusted DIO value to their children.
>
> I actually find that there isn't a lot else to delete.
>
> I am concerned that I did not understand the WG consensus correctly, so I
> am
> have not yet published this version.
>
> Do we want to retain the ability for the root to send a value 0-0x7f into
> the DODAG,
> or was it only 0 and 1 that were useful?
>

The Root should have the ability to send any value into the DODAG. If Root
is limited to value 0/1 and if it is not possible for any 6LRs to update
the value then we might as well restrict the parameter size to 1 bit! Am I
missing anything here?



>
> --
> Michael Richardson <mcr+IETF@sandelman.ca>   . o O ( IPv6 IøT consulting )
>            Sandelman Software Works Inc, Ottawa and Worldwide
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