Re: [Lsr] Moving Forward [Re: Flooding Reduction Draft Redux]

David Allan I <david.i.allan@ericsson.com> Fri, 01 February 2019 15:49 UTC

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From: David Allan I <david.i.allan@ericsson.com>
To: "chopps@chopps.org" <chopps@chopps.org>, "lsr@ietf.org" <lsr@ietf.org>
Thread-Topic: [Lsr] Moving Forward [Re: Flooding Reduction Draft Redux]
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Date: Fri, 1 Feb 2019 15:49:36 +0000
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Subject: Re: [Lsr] Moving Forward [Re: Flooding Reduction Draft Redux]
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Agreed

Cheers
Dave

-----Original Message-----
From: Lsr <lsr-bounces@ietf.org>; On Behalf Of Christian Hopps
Sent: Friday, February 1, 2019 4:26 AM
To: lsr@ietf.org
Cc: chopps@chopps.org
Subject: [Lsr] Moving Forward [Re: Flooding Reduction Draft Redux]


Summary of where we are at with dynamic flooding reduction:

 - We have a well written original work that came first and described the problems as well as a TLVs to allow for a centralized solution (draft-li-dyanmic-flooding). We do not need to standardize the centralized algorithm.

 - A small change to this work allowed for distributed algorithms and for outside work on distributed algorithms to continue in parallel.

 - We have another original work that started primarily as a distributed algorithm
   (draft-cc-ospf-flooding-reduction)

 - Finally we also have:
   - Cross-pollination of ideas.
   - Failed attempts at merging.
   - An authors list "Arms-Race".

Moving forward:

- During IETF 103 I proposed we have no conflict if we:

   1) adopt draft-li-lsr-dyanmic-flooding as the base WG document.
   2) have authors of draft-cc-lsr-flooding-reduction work on a distributed algorithm as they started with.

- Acee agreed during the meeting (as chair) that this was the best way forward. We had some agreement form the floor as well.

- Any good ideas regarding the distribution of a centralized topology can be debated and added (with appropriate attribution) to the base document after we adopt one.

- This is what happens when we adopt a document as WG work, we work on it.

- The original authors of the distributed solution can continue to work on their distributed algorithm in a separate document which would also need standardization.

Does anyone see a serious problem with this path forward?

Thanks,
Chris & Acee.
LSR Chairs.

Christian Hopps <chopps@chopps.org>; writes:

> We've had the authors of the individual conflicting drafts take a shot at merging their work.
>
>    This has failed.
>
> Here is the full history (which I also summarized during IETF103 as well). I will send a second email discussing this.
>
> - Jan 2, 2018 Publication: draft-li-dynamic-flooding and drfat-li-dynamic-flooding-isis
>   published centralized solution.
>
> - Mar 5, 2018 Publication: draft-cc-isis-flooding-reduction and draft-cc-ospf-flooding-reduction
>   published distributed solution.
>   - mention of centralized solution asserting it is not good choice.
>
> - IETF 101 (Mar 2018)
>   - Video: https://www.youtube.com/watch?v=qHmT4ytMn4w&list=PLC86T-6ZTP5j_HaBNdfPbgxGIp22cnaWS
>   - Minutes: https://datatracker.ietf.org/meeting/101/materials/minutes-101-lsr-00
>   - draft-li-dynamic-flooding-02 presented (1 author). at IETF 101
>     - Generally well received.
>   - draft-cc-ospf-flooding-reduction-00 (4 authors) presented.
>     - Serious problems immediately found during presentation -- not fully baked.
>
> - Mar 18, 2018 draft-li-dynamic-flooding-03 published (1 author)
> - Mar 27, 2018 draft-li-dynamic-flooding-04 published (1 author)
> - Apr 20, 2018 draft-cc-ospf-flooding-reduction-01 revised
> - Jun 28, 2018 draft-li-dynamic-flooding-05 published (2 authors)
>   - *SMALL CHANGE TO SUPPORT DISTRIBUTED ALGORITHM*.
>   - Does not specify distributed algorithm only how to indicate one in use, small change.
>
> - Jul 2, 2018 draft-cc-ospf-flooding-reduction-02 published
>
> - IETF 102 (Jul 14, 2018)
>   - draft-li-dynamic-flooding-05 presented.
>   - draft-cc-ospf-flooding-reduction-02 presented.
>
> - Sep 12, 2018 draft-cc-ospf-flooding-reduction-03 (4 authors)
>   - *LARGE CHANGE ADDS NEW CENTRALIZED SOLUTION*.
>
> - Sep 20, 2018 draft-cc-ospf-flooding-reduction-04 (4 authors)
>
> - Oct 21, 2018 draft-li-lsr-dynamic-flooding-00 and -01 (5 authors)
>
> - IETF 103 (Nov 3, 2018)
>
>   - Chairs give direction
>
>     - draft-li-lsr-dynamic-flooding-05 having come first, being well written and not
>       specifying a distributed algorithm (merely allowing for one) is the correct vehicle
>       to adopt as a base document.
>
>     - Distributed algorithm work (the original basis for draft-cc-ospf-flooding-reduction)
>       should continue as a separate document form the base which would thus we have no
>       conflicts.
>
> - In the meantime the authors try and merge work, this fails.
>
> - Dec 3, 2018 draft-li-lsr-dynamic-flooding-02 (7 authors)
>
> - Dec 10, 2018 draft-cc-lsr-flooding-reduction-00 (4 authors)
>
> - Jan 7, 2019  draft-cc-lsr-flooding-reduction-01 (8 authors)