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Re: [Lsr] New Version Notification for draft-hegde-lsr-asla-any-app-00.txt

Robert Raszuk <robert@raszuk.net> Sat, 21 August 2021 09:41 UTC

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From: Robert Raszuk <robert@raszuk.net>
Date: Sat, 21 Aug 2021 11:41:08 +0200
Message-ID: <CAOj+MMEBC6oH3KWY1U0qp13d4E06Tyd14x7=fc=g7suvmkgbZw@mail.gmail.com>
To: "Les Ginsberg (ginsberg)" <ginsberg@cisco.com>
Cc: Ron Bonica <rbonica@juniper.net>, "lsr@ietf.org" <lsr@ietf.org>
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Subject: Re: [Lsr] New Version Notification for draft-hegde-lsr-asla-any-app-00.txt
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> But the entire point of A-bit is that you are doing this exercise to make
> sure your routers understand A-bit only one time.
>
> *[LES:] This does not mean that you can introduce support for a new
> application (call it “bit N”) w/o upgrading your routers simply because you
> already have A-bit support. I hope that is obvious. **😊*
>

I beg to differ.

In my books you can create new interesting topologies simply by selecting
existing existing metrics on subset of links. And still say run Dijkstra on
it.

In your view - new application MUST use new metric which is something I
fundamentally disagree with.



>  *My original point was simply  that the statement about “backwards
> compatibility” regarding A-bit isn’t accurate. Good that we now agree on
> that.*
>

That is correct IMO.

Thx,
R.

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