mLDP Extensions for Multi-Topology Routing
draft-ietf-mpls-mldp-multi-topology-05

(Via drafts-lastcall@iana.org): IESG/Authors/WG Chairs:

IANA has completed its review of draft-ietf-mpls-mldp-multi-topology-05. If any part of this review is inaccurate, please let us know.

IANA understands that, upon approval of this document, there is a single action which we must complete.

In the TLV Type Name Space Registry in the Label Distribution Protocol (LDP) Parameters registry group located at:

https://www.iana.org/assignments/ldp-namespaces/

a single new registration will be made as follows:

Value: [ TBD-at-Registration ]
Description: MT Multipoint Capability
Reference: [ RFC-to-be ]
Notes/Registration Date:

We understand that this is the only action required to be completed upon approval of this document.

NOTE: The action requested in this document will not be completed until the document has been approved for publication as an RFC. This message is meant only to confirm the action that will be performed.

For definitions of IANA review states, please see:

https://datatracker.ietf.org/help/state/draft/iana-review

Thank you,

David Dong
IANA Services Sr. Specialist

The following Last Call announcement was sent out (ends 2024-05-02):

From: The IESG
To: IETF-Announce
CC: draft-ietf-mpls-mldp-multi-topology@ietf.org, james.n.guichard@futurewei.com, mpls-chairs@ietf.org, mpls@ietf.org, tsaad.net@gmail.com
Reply-To: last-call@ietf.org
Sender:
Subject: Last Call:  (mLDP Extensions for Multi-Topology Routing) to Proposed Standard


The IESG has received a request from the Multiprotocol Label Switching WG
(mpls) to consider the following document: - 'mLDP Extensions for
Multi-Topology Routing'
  as Proposed Standard

The IESG plans to make a decision in the next few weeks, and solicits final
comments on this action. Please send substantive comments to the
last-call@ietf.org mailing lists by 2024-05-02. Exceptionally, comments may
be sent to iesg@ietf.org instead. In either case, please retain the beginning
of the Subject line to allow automated sorting.

Abstract


  Multi-Topology Routing (MTR) is a technology to enable service
  differentiation within an IP network.  Flexible Algorithm (FA) is
  another mechanism of creating a sub-topology within a topology using
  defined topology constraints and computation algorithm.  In order to
  deploy mLDP (Multipoint label distribution protocol) in a network
  that supports MTR and/or FA, mLDP is required to become topology and
  FA aware.  This document specifies extensions to mLDP to support MTR
  with FA such that when building a Multipoint LSPs(Label Switched
  Paths) it can follow a particular topology and algorithm.




The file can be obtained via
https://datatracker.ietf.org/doc/draft-ietf-mpls-mldp-multi-topology/



No IPR declarations have been submitted directly on this I-D.

Request for posting confirmation emailed to previous authors: Anuj Budhiraja , Arkadiy Gulko , IJsbrand Wijnands , Mankamana Mishra , Syed Raza , Zhaohui Zhang , mpls-chairs@ietf.org

## Document History

1. Does the working group (WG) consensus represent the strong concurrence of a
  few individuals, with others being silent, or did it reach broad agreement?
[Ans]: The WG consensus represents broad agreement.

2. Was there controversy about particular points, or were there decisions where
  the consensus was particularly rough?
[Ans]: No.

3. Has anyone threatened an appeal or otherwise indicated extreme discontent? If
  so, please summarize the areas of conflict in separate email messages to the
  responsible Area Director. (It should be in a separate email because this
  questionnaire is publicly available.)
[Ans]: No.

4. For protocol documents, are there existing implementations of the contents of
  the document? Have a significant number of potential implementers indicated
  plans to implement? Are any existing implementations reported somewhere,
  either in the document itself (as [RFC 7942][3] recommends) or elsewhere
  (where)?
[Ans]: Yes, an implementations exist. See section 9 of the document.

## Additional Reviews

5. Do the contents of this document closely interact with technologies in other
  IETF working groups or external organizations, and would it therefore benefit
  from their review? Have those reviews occurred? If yes, describe which
  reviews took place.
[Ans]: Yes, aspects of the solution leverage IGP extensions for flexible algorithm defined by
  SR and IGP/LSR WGs. The respective WGs were involved during the progress of the document
  and during the WGLC.
     
6. Describe how the document meets any required formal expert review criteria,
  such as the MIB Doctor, YANG Doctor, media type, and URI type reviews.
[Ans]: Yes, MPLS review team members reviewed before adoption by the WG. Further reviews by
the RTGDIR members and all comments were addressed.


7. If the document contains a YANG module, has the final version of the module
  been checked with any of the [recommended validation tools][4] for syntax and
  formatting validation? If there are any resulting errors or warnings, what is
  the justification for not fixing them at this time? Does the YANG module
  comply with the Network Management Datastore Architecture (NMDA) as specified
  in [RFC 8342][5]?
[Ans]: Does not contain a YANG module.

8. Describe reviews and automated checks performed to validate sections of the
  final version of the document written in a formal language, such as XML code,
  BNF rules, MIB definitions, CBOR's CDDL, etc.
[Ans]: not applicable.

## Document Shepherd Checks

9. Based on the shepherd's review of the document, is it their opinion that this
  document is needed, clearly written, complete, correctly designed, and ready
  to be handed off to the responsible Area Director?
[Ans]: this document defines extensions to allow MLDP to become topology and flex-algo
to enable service differentiation for multicast traffic over MPLS network. The shepherd
believes this is needed document, well written and ready to be handed off to the AD.

10. Several IETF Areas have assembled [lists of common issues that their
    reviewers encounter][6]. For which areas have such issues been identified
    and addressed? For which does this still need to happen in subsequent
    reviews?
[Ans]: The RTGDIR was engaged to perform early review.

11. What type of RFC publication is being requested on the IETF stream ([Best
    Current Practice][12], [Proposed Standard, Internet Standard][13],
    [Informational, Experimental or Historic][14])? Why is this the proper type
    of RFC? Do all Datatracker state attributes correctly reflect this intent?
[Ans]: Proposed Standard.


12. Have reasonable efforts been made to remind all authors of the intellectual
    property rights (IPR) disclosure obligations described in [BCP 79][7]? To
    the best of your knowledge, have all required disclosures been filed? If
    not, explain why. If yes, summarize any relevant discussion, including links
    to publicly-available messages when applicable.
[Ans]: A first IPR poll was done before adoption of the document. A second IPR poll was
done before WGLC.

13. Has each author, editor, and contributor shown their willingness to be
    listed as such? If the total number of authors and editors on the front page
    is greater than five, please provide a justification.
[Ans]: Currently, the document has 6 authors at the front page. Authors are associated with
different vendors and an operator.

14. Document any remaining I-D nits in this document. Simply running the [idnits
    tool][8] is not enough; please review the ["Content Guidelines" on
    authors.ietf.org][15]. (Also note that the current idnits tool generates
    some incorrect warnings; a rewrite is underway.)
[Ans]: Nits to be addressed.

15. Should any informative references be normative or vice-versa? See the [IESG
    Statement on Normative and Informative References][16].
[Ans]: None identified.

16. List any normative references that are not freely available to anyone. Did
    the community have sufficient access to review any such normative
    references?
[Ans]: None.

17. Are there any normative downward references (see [RFC 3967][9] and [BCP
    97][10]) that are not already listed in the [DOWNREF registry][17]? If so,
    list them.
[Ans]: None.

18. Are there normative references to documents that are not ready to be
    submitted to the IESG for publication or are otherwise in an unclear state?
    If so, what is the plan for their completion?
[Ans]: None.

19. Will publication of this document change the status of any existing RFCs? If
    so, does the Datatracker metadata correctly reflect this and are those RFCs
    listed on the title page, in the abstract, and discussed in the
    introduction? If not, explain why and point to the part of the document
    where the relationship of this document to these other RFCs is discussed.
[Ans]: No.

20. Describe the document shepherd's review of the IANA considerations section,
    especially with regard to its consistency with the body of the document.
    Confirm that all aspects of the document requiring IANA assignments are
    associated with the appropriate reservations in IANA registries. Confirm
    that any referenced IANA registries have been clearly identified. Confirm
    that each newly created IANA registry specifies its initial contents,
    allocations procedures, and a reasonable name (see [RFC 8126][11]).
[Ans]: the IANA section defines a new LDP capability parameter TLV for 'MT Multipoint
Capability'  and requests a new code point for the LDP TLV code point
be  assigned the lowest available value after 0x0500 from "TLV Type Name Space"
in the "Label Distribution Protocol (LDP) Parameters" registry within
"Label Distribution Protocol (LDP) Name Spaces".


21. List any new IANA registries that require Designated Expert Review for
    future allocations. Are the instructions to the Designated Expert clear?
    Please include suggestions of designated experts, if appropriate.
[Ans]: yes. One registry:
"TLV Type Name Space" in the "Label Distribution Protocol (LDP) Parameters" registry within "Label Distribution Protocol (LDP) Name Spaces"

[1]: https://www.ietf.org/about/groups/iesg/
[2]: https://www.rfc-editor.org/rfc/rfc4858.html
[3]: https://www.rfc-editor.org/rfc/rfc7942.html
[4]: https://trac.ietf.org/trac/ops/wiki/yang-review-tools
[5]: https://www.rfc-editor.org/rfc/rfc8342.html
[6]: https://trac.ietf.org/trac/iesg/wiki/ExpertTopics
[7]: https://www.rfc-editor.org/info/bcp79
[8]: https://www.ietf.org/tools/idnits/
[9]: https://www.rfc-editor.org/rfc/rfc3967.html
[10]: https://www.rfc-editor.org/info/bcp97
[11]: https://www.rfc-editor.org/rfc/rfc8126.html
[12]: https://www.rfc-editor.org/rfc/rfc2026.html#section-5
[13]: https://www.rfc-editor.org/rfc/rfc2026.html#section-4.1
[14]: https://www.rfc-editor.org/rfc/rfc2026.html#section-4.2
[15]: https://authors.ietf.org/en/content-guidelines-overview
[16]: https://www.ietf.org/about/groups/iesg/statements/normative-informative-references/
[17]: https://datatracker.ietf.org/doc/downref/

## Document History

1. Does the working group (WG) consensus represent the strong concurrence of a
  few individuals, with others being silent, or did it reach broad agreement?
[Ans]: The WG consensus represents broad agreement.

2. Was there controversy about particular points, or were there decisions where
  the consensus was particularly rough?
[Ans]: No.

3. Has anyone threatened an appeal or otherwise indicated extreme discontent? If
  so, please summarize the areas of conflict in separate email messages to the
  responsible Area Director. (It should be in a separate email because this
  questionnaire is publicly available.)
[Ans]: No.

4. For protocol documents, are there existing implementations of the contents of
  the document? Have a significant number of potential implementers indicated
  plans to implement? Are any existing implementations reported somewhere,
  either in the document itself (as [RFC 7942][3] recommends) or elsewhere
  (where)?
[Ans]: Yes, an implementations exist. See section 9 of the document.

## Additional Reviews

5. Do the contents of this document closely interact with technologies in other
  IETF working groups or external organizations, and would it therefore benefit
  from their review? Have those reviews occurred? If yes, describe which
  reviews took place.
[Ans]: Yes, aspects of the solution leverage IGP extensions for flexible algorithm defined by
  SR and IGP/LSR WGs. The respective WGs were involved during the progress of the document
  and during the WGLC.
     
6. Describe how the document meets any required formal expert review criteria,
  such as the MIB Doctor, YANG Doctor, media type, and URI type reviews.
[Ans]: Yes, MPLS review team members reviewed before adoption by the WG. Further reviews by
the RTGDIR members and all comments were addressed.


7. If the document contains a YANG module, has the final version of the module
  been checked with any of the [recommended validation tools][4] for syntax and
  formatting validation? If there are any resulting errors or warnings, what is
  the justification for not fixing them at this time? Does the YANG module
  comply with the Network Management Datastore Architecture (NMDA) as specified
  in [RFC 8342][5]?
[Ans]: Does not contain a YANG module.

8. Describe reviews and automated checks performed to validate sections of the
  final version of the document written in a formal language, such as XML code,
  BNF rules, MIB definitions, CBOR's CDDL, etc.
[Ans]: not applicable.

## Document Shepherd Checks

9. Based on the shepherd's review of the document, is it their opinion that this
  document is needed, clearly written, complete, correctly designed, and ready
  to be handed off to the responsible Area Director?
[Ans]: this document defines extensions to allow MLDP to become topology and flex-algo
to enable service differentiation for multicast traffic over MPLS network. The shepherd
believes this is needed document, well written and ready to be handed off to the AD.

10. Several IETF Areas have assembled [lists of common issues that their
    reviewers encounter][6]. For which areas have such issues been identified
    and addressed? For which does this still need to happen in subsequent
    reviews?
[Ans]: The RTGDIR was engaged to perform early review.

11. What type of RFC publication is being requested on the IETF stream ([Best
    Current Practice][12], [Proposed Standard, Internet Standard][13],
    [Informational, Experimental or Historic][14])? Why is this the proper type
    of RFC? Do all Datatracker state attributes correctly reflect this intent?
[Ans]: Proposed Standard.


12. Have reasonable efforts been made to remind all authors of the intellectual
    property rights (IPR) disclosure obligations described in [BCP 79][7]? To
    the best of your knowledge, have all required disclosures been filed? If
    not, explain why. If yes, summarize any relevant discussion, including links
    to publicly-available messages when applicable.
[Ans]: A first IPR poll was done before adoption of the document. A second IPR poll was
done before WGLC.

13. Has each author, editor, and contributor shown their willingness to be
    listed as such? If the total number of authors and editors on the front page
    is greater than five, please provide a justification.
[Ans]: Currently, the document has 6 authors at the front page. Authors are associated with
different vendors and an operator.

14. Document any remaining I-D nits in this document. Simply running the [idnits
    tool][8] is not enough; please review the ["Content Guidelines" on
    authors.ietf.org][15]. (Also note that the current idnits tool generates
    some incorrect warnings; a rewrite is underway.)
[Ans]: Nits to be addressed.

15. Should any informative references be normative or vice-versa? See the [IESG
    Statement on Normative and Informative References][16].
[Ans]: None identified.

16. List any normative references that are not freely available to anyone. Did
    the community have sufficient access to review any such normative
    references?
[Ans]: None.

17. Are there any normative downward references (see [RFC 3967][9] and [BCP
    97][10]) that are not already listed in the [DOWNREF registry][17]? If so,
    list them.
[Ans]: None.

18. Are there normative references to documents that are not ready to be
    submitted to the IESG for publication or are otherwise in an unclear state?
    If so, what is the plan for their completion?
[Ans]: None.

19. Will publication of this document change the status of any existing RFCs? If
    so, does the Datatracker metadata correctly reflect this and are those RFCs
    listed on the title page, in the abstract, and discussed in the
    introduction? If not, explain why and point to the part of the document
    where the relationship of this document to these other RFCs is discussed.
[Ans]: No.

20. Describe the document shepherd's review of the IANA considerations section,
    especially with regard to its consistency with the body of the document.
    Confirm that all aspects of the document requiring IANA assignments are
    associated with the appropriate reservations in IANA registries. Confirm
    that any referenced IANA registries have been clearly identified. Confirm
    that each newly created IANA registry specifies its initial contents,
    allocations procedures, and a reasonable name (see [RFC 8126][11]).
[Ans]: the IANA section defines a new LDP capability parameter TLV for 'MT Multipoint
Capability'  and requests a new code point for the LDP TLV code point
be  assigned the lowest available value after 0x0500 from "TLV Type Name Space"
in the "Label Distribution Protocol (LDP) Parameters" registry within
"Label Distribution Protocol (LDP) Name Spaces".


21. List any new IANA registries that require Designated Expert Review for
    future allocations. Are the instructions to the Designated Expert clear?
    Please include suggestions of designated experts, if appropriate.
[Ans]: yes. One registry:
"TLV Type Name Space" in the "Label Distribution Protocol (LDP) Parameters" registry within "Label Distribution Protocol (LDP) Name Spaces"

[1]: https://www.ietf.org/about/groups/iesg/
[2]: https://www.rfc-editor.org/rfc/rfc4858.html
[3]: https://www.rfc-editor.org/rfc/rfc7942.html
[4]: https://trac.ietf.org/trac/ops/wiki/yang-review-tools
[5]: https://www.rfc-editor.org/rfc/rfc8342.html
[6]: https://trac.ietf.org/trac/iesg/wiki/ExpertTopics
[7]: https://www.rfc-editor.org/info/bcp79
[8]: https://www.ietf.org/tools/idnits/
[9]: https://www.rfc-editor.org/rfc/rfc3967.html
[10]: https://www.rfc-editor.org/info/bcp97
[11]: https://www.rfc-editor.org/rfc/rfc8126.html
[12]: https://www.rfc-editor.org/rfc/rfc2026.html#section-5
[13]: https://www.rfc-editor.org/rfc/rfc2026.html#section-4.1
[14]: https://www.rfc-editor.org/rfc/rfc2026.html#section-4.2
[15]: https://authors.ietf.org/en/content-guidelines-overview
[16]: https://www.ietf.org/about/groups/iesg/statements/normative-informative-references/
[17]: https://datatracker.ietf.org/doc/downref/

Request for posting confirmation emailed to previous authors: Anuj Budhiraja , Arkadiy Gulko , IJsbrand Wijnands , Mankamana Mishra , Syed Raza , Zhaohui Zhang , mpls-chairs@ietf.org