Re: [Detnet] WG Last Call: draft-ietf-detnet-bounded-latency-02

Lou Berger <lberger@labn.net> Sun, 21 February 2021 21:59 UTC

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From: Lou Berger <lberger@labn.net>
To: DetNet WG <detnet@ietf.org>, "draft-ietf-detnet-bounded-latency@ietf.org" <draft-ietf-detnet-bounded-latency@ietf.org>
References: <d38af2a0-843f-e117-3368-570f4e26c105@labn.net>
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Date: Sun, 21 Feb 2021 16:59:25 -0500
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Archived-At: <https://mailarchive.ietf.org/arch/msg/detnet/Bk1SpbMOc34dBFFW_4XaTz8U6ww>
Subject: Re: [Detnet] WG Last Call: draft-ietf-detnet-bounded-latency-02
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Hi,

I have some comments as part of my shepherd review.  The comments 
largely relate to clarifying terminology and alignment with the existing 
DetNet RFCs, and the substance of most of the document -- so hopefully 
won't be too difficult to address.

- Abstract
I think the abstract should to be updated to match the current content 
of the document. I suggest just copying the 4th and 5th paragraphs from 
the Introduction section.

- general comment: classes of (DetNet) Service

The document states that it uses terminology from RFC8655, it also uses 
the terms "Classes of DetNet Service", " DetNet Classes of Service"  and 
other similar forms of these terms.  RFC8655 uses this term in one place 
" Class-of-Service schemes (e.g., DiffServ)" and also mentions "classes 
of DetNet flows"  in two places.  The data plane documents [RFC8964] and 
[RFC8934] also describe Class of Service in the context of DiffServ (and 
not DetNet).

In reading the document it seems that it is not using CoS in the typical 
way used in the IETF  or the other DetNet RFCs, and is introducing a new 
definition for CoS.   II think having a document specific definition of 
CoS probably isn't helpful. It would be best to use existing DetNet 
terminology.  I suspect  "flow aggregate" is the closest, but perhaps 
I'm missing something.

- alignment with the Data Plane RFCs

The lists in section 3.1 and in section 6.4 are not well aligned with 
the Data plane documents.  These sections should be aligned with the 
provisioning of IP flows, as summarized in Section  6 of RFC8939, and 
MPLS as summarized in Section 5 of RFC8964.

- minor comment service vs frame preemption

Section 3.1 uses the term "un-provisioning", I read the text as meaning 
"service preemption".

In the rest of the document preemption refers to "frame preemption" and 
this should be clarified.

- id nits, please ensure the document passes idnits without errors, see

https://www6.ietf.org/tools/idnits?url=https://www.ietf.org/archive/id/draft-ietf-detnet-bounded-latency-02.txt

That's it,

Lou


On 2/5/21 8:30 AM, Lou Berger wrote:
> All,
>
> This starts working group last call on 
> draft-ietf-detnet-bounded-latency-02
> https://datatracker.ietf.org/doc/draft-ietf-detnet-bounded-latency/
>
> The working group last call ends on February 19th.
> Please send your comments to the working group mailing list.
>
> Please note, there was an IPR disclosure against this document
> submitted on January 14, 2021, see https://datatracker.ietf.org/ipr/4581/
> While this disclosure came very late in the document life cycle,
> it appears the filing was also relatively recent (2019-10-16) and
> after the pre adoption IP call:
> https://mailarchive.ietf.org/arch/msg/detnet/1mwYdadDzTLudcuH5T5O7R_KlDs
>
> Positive comments, e.g., "I've reviewed this document
> and believe it is ready for publication", are welcome!
> This is useful and important, even from authors.
>
> Thank you,
> Lou (DetNet Co-Chair & doc Shepherd)
>
>
>
> _______________________________________________
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> detnet@ietf.org
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