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Re: [Last-Call] [Tsv-art] Tsvart last call review of draft-ietf-rtgwg-qos-model-11

Ruediger.Geib@telekom.de Tue, 12 December 2023 14:02 UTC

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From: Ruediger.Geib@telekom.de
To: last-call@ietf.org, draft-ietf-rtgwg-qos-model.all@ietf.org
CC: rtgwg@ietf.org, tsv-art@ietf.org
Thread-Topic: Re: [Tsv-art] Tsvart last call review of draft-ietf-rtgwg-qos-model-11
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Archived-At: <https://mailarchive.ietf.org/arch/msg/last-call/kGN-q4LrhORhZ-752Y12AL_oDnM>
Subject: Re: [Last-Call] [Tsv-art] Tsvart last call review of draft-ietf-rtgwg-qos-model-11
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Dear authors of draft-ietf-rtgwg-qos-model,

I appreciate your work and I know, you have been active for years, to reach the current state. While going through your draft, I felt it to be complete if looked at as generic DiffServ functionality. Time passed since you started and some new RFCs related to AQM evolved, like
Codel, https://datatracker.ietf.org/doc/html/rfc8289
PIE, https://www.rfc-editor.org/rfc/rfc8033.html
or L4S,
https://www.rfc-editor.org/rfc/rfc9332.html
https://www.rfc-editor.org/rfc/rfc9331.html
https://www.rfc-editor.org/rfc/rfc9330.html

My personal view is, draft-ietf-rtgwg-qos-model should progress now, and being looked at as a generic qos-model. New QoS related RFCs, but not part of draft-ietf-rtgwg-qos-model should be mentioned, but their inclusion left to a review.

One comment related to content:
I'd appreciate all burst-sizes and queue or buffer related configs, including RED/WRED thresholds, to be settable in units of time. That will be microseconds and milliseconds as an option. I think, this makes sense as technologies like Virtual Output Queueing are easier to operate and configure from a provider point of view, if buffer management is based on buffer occupation (which is often measured in units of time).

An editorial comment:
The draft can be improved on its formal sections, if it is reviewed by a native speaker, I think (and excuse, if I'm wrong).

I'm not a YANG expert.

Regards,

Ruediger

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