Re: [mpls] Fwd: New Version Notification for draft-andersson-mpls-mna-fwk-02.txt

[Haoyu Song <[e-mail]>]

3.1<https://datatracker.ietf.org/doc/html/draft-andersson-mpls-mna-fwk-02.html#section-3.1>.  The MNA Label

   The first LSE in a network action sub-stack contains a special label
   that indicates a network action sub-stack.  A solution has several
   choices for this special label.


Hi Tony,

I'm confused by the above text. I assume the network action sub-stack is for the ISD encoding. Then an indicator of ISD should be decoupled with the ISD itself. Why is  a special label needed in the sub-stack to indicate the sub-stack? Is that only local to the sub-stack? Then why is it called MNA label?

My understanding is that both ISD and PSD need some sort of indicator. It's possible one special label can serve both (e.g., with some flag in the label to tell whether ISD, PSD or both exist, but this should belong to the solution).

I think the text should be updated in the new revision to reflect the concept more neutrally and clearly.

Best regards,
Haoyu

From: mpls <[e-mail]> On Behalf Of Tony Li
Sent: Thursday, May 26, 2022 12:52 PM
To: mpls <[e-mail]>
Subject: [mpls] Fwd: New Version Notification for draft-andersson-mpls-mna-fwk-02.txt


HI,

This is an update to the MNA framework draft, as previously mentioned.

I'm attaching a diff from the previous version to simplify your review.

Regards,
Tony




Begin forwarded message:

From: [e-mail]<mailto:[e-mail]>
Subject: New Version Notification for draft-andersson-mpls-mna-fwk-02.txt
Date: May 26, 2022 at 12:49:48 PM PDT
To: "Loa Andersson" <[e-mail]<mailto:[e-mail]>>, "Matthew Bocci" <[e-mail]<mailto:[e-mail]>>, "Stewart Bryant" <[e-mail]<mailto:[e-mail]>>, "Tony Li" <[e-mail]<mailto:[e-mail]>>


A new version of I-D, draft-andersson-mpls-mna-fwk-02.txt
has been successfully submitted by Tony Li and posted to the
IETF repository.

Name: draft-andersson-mpls-mna-fwk
Revision: 02
Title: MPLS Network Actions Framework
Document date: 2022-05-26
Group: mpls
Pages: 18
URL:            https://www.ietf.org/archive/id/draft-andersson-mpls-mna-fwk-02.txt<https://nam11.safelinks.protection.outlook.com/?url=https%3A%2F%2Fwww.ietf.org%2Farchive%2Fid%2Fdraft-andersson-mpls-mna-fwk-02.txt&data=05%7C01%7Chaoyu.song%40futurewei.com%7C3c2b57e69167453a9e2108da3f514560%7C0fee8ff2a3b240189c753a1d5591fedc%7C1%7C1%7C637891916615005560%7CUnknown%7CTWFpbGZsb3d8eyJWIjoiMC4wLjAwMDAiLCJQIjoiV2luMzIiLCJBTiI6Ik1haWwiLCJXVCI6Mn0%3D%7C2000%7C%7C%7C&sdata=37JqXgKpCWDVcLivrAJbI7bABJZzjkTjzMv1tAFuyUA%3D&reserved=0>
Status:         https://datatracker.ietf.org/doc/draft-andersson-mpls-mna-fwk/<https://nam11.safelinks.protection.outlook.com/?url=https%3A%2F%2Fdatatracker.ietf.org%2Fdoc%2Fdraft-andersson-mpls-mna-fwk%2F&data=05%7C01%7Chaoyu.song%40futurewei.com%7C3c2b57e69167453a9e2108da3f514560%7C0fee8ff2a3b240189c753a1d5591fedc%7C1%7C1%7C637891916615005560%7CUnknown%7CTWFpbGZsb3d8eyJWIjoiMC4wLjAwMDAiLCJQIjoiV2luMzIiLCJBTiI6Ik1haWwiLCJXVCI6Mn0%3D%7C2000%7C%7C%7C&sdata=Gay2oqbb4jDegX1xpmFiJ6sSGwqMwe5erWWWM24PW%2FQ%3D&reserved=0>
Htmlized:       https://datatracker.ietf.org/doc/html/draft-andersson-mpls-mna-fwk<https://nam11.safelinks.protection.outlook.com/?url=https%3A%2F%2Fdatatracker.ietf.org%2Fdoc%2Fhtml%2Fdraft-andersson-mpls-mna-fwk&data=05%7C01%7Chaoyu.song%40futurewei.com%7C3c2b57e69167453a9e2108da3f514560%7C0fee8ff2a3b240189c753a1d5591fedc%7C1%7C1%7C637891916615005560%7CUnknown%7CTWFpbGZsb3d8eyJWIjoiMC4wLjAwMDAiLCJQIjoiV2luMzIiLCJBTiI6Ik1haWwiLCJXVCI6Mn0%3D%7C2000%7C%7C%7C&sdata=oApRGF6Rg14CyzpwjN7HyVL6sYAVhNUsqEunFweFqA4%3D&reserved=0>
Diff:           https://www.ietf.org/rfcdiff?url2=draft-andersson-mpls-mna-fwk-02<https://nam11.safelinks.protection.outlook.com/?url=https%3A%2F%2Fwww.ietf.org%2Frfcdiff%3Furl2%3Ddraft-andersson-mpls-mna-fwk-02&data=05%7C01%7Chaoyu.song%40futurewei.com%7C3c2b57e69167453a9e2108da3f514560%7C0fee8ff2a3b240189c753a1d5591fedc%7C1%7C1%7C637891916615005560%7CUnknown%7CTWFpbGZsb3d8eyJWIjoiMC4wLjAwMDAiLCJQIjoiV2luMzIiLCJBTiI6Ik1haWwiLCJXVCI6Mn0%3D%7C2000%7C%7C%7C&sdata=07X3i8j1yDihtNzHA6XbqbwAOrVoHe8vNrHMwJ%2B53pE%3D&reserved=0>

Abstract:
  This document specifies an architectural framework for the MPLS
  Network Actions (MNA) technologies.  MNA technologies are used to
  indicate actions for Label Switched Paths (LSPs) and/or MPLS packets
  and to transfer data needed for these actions.

  The document describes a common set of network actions and
  information elements supporting additional operational models and
  capabilities of MPLS networks.  Some of these actions are defined in
  existing MPLS specifications, while others require extensions to
  existing specifications to meet the requirements found in
  "Requirements for MPLS Network Action Indicators and Ancillary Data".




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