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Re: [Detnet] Alvaro Retana's No Objection on draft-ietf-detnet-ip-over-mpls-07: (with COMMENT)

Balázs Varga A <balazs.a.varga@ericsson.com> Wed, 09 September 2020 12:50 UTC

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From: Balázs Varga A <balazs.a.varga@ericsson.com>
To: Alvaro Retana <aretana.ietf@gmail.com>, The IESG <iesg@ietf.org>
CC: "draft-ietf-detnet-ip-over-mpls@ietf.org" <draft-ietf-detnet-ip-over-mpls@ietf.org>, "detnet-chairs@ietf.org" <detnet-chairs@ietf.org>, "detnet@ietf.org" <detnet@ietf.org>, Ethan Grossman <eagros@dolby.com>
Thread-Topic: Alvaro Retana's No Objection on draft-ietf-detnet-ip-over-mpls-07: (with COMMENT)
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Date: Wed, 09 Sep 2020 12:50:11 +0000
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Archived-At: <https://mailarchive.ietf.org/arch/msg/detnet/8aldcwdCth2IjS2D8Gp2jP8vE1s>
Subject: Re: [Detnet] Alvaro Retana's No Objection on draft-ietf-detnet-ip-over-mpls-07: (with COMMENT)
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Hi Alvaro,

Many thanks for your review. Regarding:
(1) Yes, there are similarities on high level. However, the main differences of mapping to DetNet MPLS (compared to plain MPLS) are that (1) there is a mandatory flow identification (and not the FEC), (2) the d-CW (DetNet Control Word) is mandatory and (3) DetNet specific treatment is needed.
(2) draft-ietf-detnet-dp-sol-ip was replaced primarly by draft-ietf-detnet-ip. But, I see your point, this draft is also related.
(3) Thanks. Corrected.

Thanks & Cheers
Bala'zs

-----Original Message-----
From: Alvaro Retana via Datatracker <noreply@ietf.org> 
Sent: Wednesday, September 9, 2020 12:40 AM
To: The IESG <iesg@ietf.org>
Cc: draft-ietf-detnet-ip-over-mpls@ietf.org; detnet-chairs@ietf.org; detnet@ietf.org; Ethan Grossman <eagros@dolby.com>
Subject: Alvaro Retana's No Objection on draft-ietf-detnet-ip-over-mpls-07: (with COMMENT)

Alvaro Retana has entered the following ballot position for
draft-ietf-detnet-ip-over-mpls-07: No Objection

When responding, please keep the subject line intact and reply to all email addresses included in the To and CC lines. (Feel free to cut this introductory paragraph, however.)


Please refer to https://www.ietf.org/iesg/statement/discuss-criteria.html
for more information about IESG DISCUSS and COMMENT positions.


The document, along with other ballot positions, can be found here:
https://datatracker.ietf.org/doc/draft-ietf-detnet-ip-over-mpls/



----------------------------------------------------------------------
COMMENT:
----------------------------------------------------------------------

(1) I may have completely missed the point of this document; what is it?  More importantly, what is this document specifying?  Why is it on the Standards Track?

As I see it, this document says that IP flows can be carried over MPLS -- ok, specifically over DetNet MPLS.  The mapping of IP flows to an MPLS LSP is no different in DetNet MPLS when compared to "plain" MPLS...nor is it different for IP vs DetNet IP flows -- from §4.2:

   Mapping of IP to DetNet MPLS is similar for DetNet IP flows and IP
   flows.  The six-tuple of IP is mapped to the S-Label in both cases.
   The various fields may be mapped or ignored when going from IP to
   MPLS.

At best, it seems to me that this document could be Informational.

(2) It looks like this document should be tagged in the Datatracker as (also) replacing draft-ietf-detnet-dp-sol-ip.

(3) s/both Non-DetNet and DetNet IP packet/both Non-DetNet and DetNet IP packets

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