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[Teas] Re: Call for adoption: draft-many-teas-power-steering-01 (Ends 2026-09-10)

"Barth, Colby" <jonathan.barth@hpe.com> Wed, 02 September 2026 15:13 UTC

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From: "Barth, Colby" <jonathan.barth@hpe.com>
To: Robert Raszuk <robert@raszuk.net>
Thread-Topic: [Teas] Re: Call for adoption: draft-many-teas-power-steering-01 (Ends 2026-09-10)
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Date: Wed, 02 Sep 2026 15:13:03 +0000
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Subject: [Teas] Re: Call for adoption: draft-many-teas-power-steering-01 (Ends 2026-09-10)
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Robert,

I think Tony has mentioned this before in this thread but the PCPPS derived metric will continue to “honor” the TE intent of the network.  We will update https://datatracker.ietf.org/doc/draft-many-teas-power-steering/ to describe one possible algorithm in the next revision.

-- Colby

From: Robert Raszuk <robert@raszuk.net>
Date: Wednesday, September 2, 2026 at 7:16 AM
To: Barth, Colby <jonathan.barth@hpe.com>
Cc: Aijun Wang <wangaijun@tsinghua.org.cn>; Tony Li <tony.li@tony.li>; Vishnu Pavan Beeram <vishnupavan.ietf@gmail.com>; Oscar de Dios <oscar.gonzalezdedios@telefonica.com>; TEAS WG <teas@ietf.org>; teas-chairs@ietf.org <teas-chairs@ietf.org>; draft-many-teas-power-steering@ietf.org <draft-many-teas-power-steering@ietf.org>
Subject: Re: [Teas] Re: Call for adoption: draft-many-teas-power-steering-01 (Ends 2026-09-10)

Hi Colby,

The reason that we perform TE in the network, is to assure the QoS of some important services, in the SPF based non-TE traffic background.

<cb> That is only one reason to employ traffic engineering.  There are many other reasons that operators use and deploy, ubiquitously, Traffic Engineering solutions.

Very true !

But with that I am a bit not sure if this is now a really good thing to place power saving as prime citizen or top TE constraint while pushing aside all other good reasons one performs TE in the network.

Hi Tony,

> There are other techniquest for redirecting non-TE traffic, such as changing metrics. This is very well-known.

Of course, this is very clear.

What however is not so clear, is how do you account for such non-TE traffic and avoid placing TE traffic on links where non-TE traffic may already (in spikes) be reaching link's capacity ?

As we discussed the other day this solution works only for 100% of TE networks - which surely does not make it an inferior proposal. But it would be good to make it clear in the documents.

Kind regards,
Robert

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