Re: [spring] Robert Wilton's No Objection on draft-ietf-spring-nsh-sr-12: (with COMMENT)

James Guichard <james.n.guichard@futurewei.com> Tue, 25 April 2023 16:15 UTC

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From: James Guichard <james.n.guichard@futurewei.com>
To: Robert Wilton <rwilton@cisco.com>, The IESG <iesg@ietf.org>
CC: "draft-ietf-spring-nsh-sr@ietf.org" <draft-ietf-spring-nsh-sr@ietf.org>, "spring-chairs@ietf.org" <spring-chairs@ietf.org>, "spring@ietf.org" <spring@ietf.org>, "bruno.decraene@orange.com" <bruno.decraene@orange.com>
Thread-Topic: Robert Wilton's No Objection on draft-ietf-spring-nsh-sr-12: (with COMMENT)
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Archived-At: <https://mailarchive.ietf.org/arch/msg/spring/zC2Ht93yRyEcIxP1xZyn8C9p8-k>
Subject: Re: [spring] Robert Wilton's No Objection on draft-ietf-spring-nsh-sr-12: (with COMMENT)
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Hi Robert,

This is because the two SFF's in the diagram are directly connected so the SFF2 label is not needed as SFF2 will act upon the top entry (SF2). If the two SFFs were not directly connected then the SFF2 entry would be there until the penultimate hop. Hope this helps clarify (caveat: I win no prizes for my diagrams LOL).

Jim

-----Original Message-----
From: Robert Wilton via Datatracker <noreply@ietf.org>
Sent: Tuesday, April 25, 2023 11:07 AM
To: The IESG <iesg@ietf.org>
Cc: draft-ietf-spring-nsh-sr@ietf.org; spring-chairs@ietf.org; spring@ietf.org; bruno.decraene@orange.com; bruno.decraene@orange.com
Subject: Robert Wilton's No Objection on draft-ietf-spring-nsh-sr-12: (with COMMENT)

Robert Wilton has entered the following ballot position for
draft-ietf-spring-nsh-sr-12: No Objection

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The document, along with other ballot positions, can be found here:
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----------------------------------------------------------------------
COMMENT:
----------------------------------------------------------------------

Hi,

Thanks for this document.  I have one minor comment/question:

Minor level comments:

(1) p 9, sec 4.  SR-based SFC with Integrated NSH Service Plane

             +------------+        +------------+        +------------+
             |   S(SF1)   |        |   S(SF2)   |        | F:Inner Pkt|
             +------------+        +------------+        +------------+
             |   S(SFF2)  |        | N(100,254) |
             +------------+        +------------+
             |   S(SF2)   |        | F:Inner Pkt|
             +------------+        +------------+
             | N(100,255) |
             +------------+
             | F:Inner Pkt|
             +------------+

>From this diagram, it wasn't clear to me why the segments have got from "SF1,
SFF2, SF2" at step (1) to just "SF2" at step (4).

Regards,
Rob