Authors and AD*,

*AD, please see question #1 below.

Authors, while reviewing this document during AUTH48, please resolve (as 
necessary) the following questions, which are also in the XML file.


1) <!-- [rfced] *AD: We see that consensus is set to "Unknown" 
for this document in the datatracker. See
<https://datatracker.ietf.org/doc/draft-ietf-mpls-mna-usecases/>.

This document was sent to Last Call, so we have used the
consensus Status of This Memo. Please confirm that this is correct.
-->


2) <!-- [rfced] The document title includes two instances of "MPLS". Are both 
needed?

Original:
  Use Cases for MPLS Network Action Indicators and MPLS Ancillary Data

Perhaps:
  Use Cases for MPLS Network Action Indicators and Ancillary Data
-->


3) <!-- [rfced] Please insert any keywords (beyond those that appear in
the title) for use on https://www.rfc-editor.org/search. -->


4) <!-- [rfced] We see that "MPLS Ancillary Data" appears in Section 1.1
("Terminology").  We see instances of "ancillary data" (no "MPLS") in the
document, but we only see "MPLS Ancillary Data" used in the document
title. Are any updates needed?

Also, note that we slightly updated the definition list as follows.

Original:
   RFC 9543 Network Slice
      is interpreted as defined in [RFC9543].  Furthermore, this
      document uses "network slice" interchangeably as a shorter version
      of the RFC 9543 Network Slice term.

   The MPLS Ancillary Data is classified as:
      *  residing within the MPLS label stack and referred to as In-
         Stack Data, and

      *  residing after the Bottom of Stack (BoS) and referred to as
         Post-Stack Data.

Updated:
   RFC 9543 Network Slice:
      Interpreted as defined in [RFC9543].  This document
      uses "network slice" interchangeably as a shorter version of the
      term "RFC 9543 Network Slice".

   MPLS Ancillary Data:
      Data that can be classified as:

      *  residing within the MPLS label stack (referred to as "in-stack
         data"), and

      *  residing after the Bottom of Stack (BoS) (referred to as "post-
         stack data").
-->


5) <!-- [rfced] Would you like for the abbreviations listed in Section 1.2
("Abbreviations") to be alphabetized? Or do you prefer the current order?
-->


6) <!-- [rfced] Please review "Policy as a policy construct". May we update as
follows (i.e., remove "policy")?

Original:
   Section 5 of
   [I-D.ietf-teas-ns-ip-mpls] defines a Network Resource Partition (NRP)
   Policy as a policy construct that enables the instantiation of
   mechanisms to support one or more network slice services.

Perhaps:
   Section 5 of [NS-IP-MPLS]
   defines a Network Resource Partition (NRP) Policy as a
   construct that enables the instantiation of mechanisms to support one
   or more network slice services.  
-->


7) <!-- [rfced] We believe that "label stack elements" here should be updated to
"label stack entries", which is used earlier in this document and in RFC 8595.
Please confirm. Also note that "label stack element" has not been
used in the RFC Series.

Original:
   [RFC8595] describes how Service Function Chaining can be realized in
   an MPLS network by emulating the Network Service Header (NSH)
   [RFC8300] using only MPLS label stack elements.
-->


8) <!-- [rfced] Please confirm that "FUNC::ARG" is correct here. We ask because
we see "LOC:FUNCT:ARG" in RFC 8986.

Original:
   MNA can be used to encode
   the FUNC::ARGs to support the functional equivalent of FUNC::ARG in
   SRv6 as described in [RFC8986].
-->


9) <!-- [rfced] Would you like to update "bottom of the label stack" here to
"BoS" or leave as is?

Original:
   In this case, BIER has defined 0b0101 as the
   value for the first nibble in the data that immediately appears after
   the bottom of the label stack for any BIER-encapsulated packet over
   MPLS.

Perhaps:
   In this case, BIER has defined 0b0101 as the
   value for the first nibble in the data that immediately appears after
   the BoS for any BIER-encapsulated packet over
   MPLS.   
-->


10) <!-- [rfced] Please confirm that the citation is correct here. We ask 
because
we do not see the specific wording "non-protocol specifying document" in
RFC-to-be 9789 (ietf-mpls-mna-fwk).

Also, to improve readability, we upddated "non-protocol specifying documents"
as follows. Let us know any concerns.

Original:
   Section 7 of "MPLS Network Action (MNA) Framework",
   [I-D.ietf-mpls-mna-fwk] outlines security considerations for non-
   protocol specifying documents.

Updated:
   Section 7 of the MNA framework [RFC9789] outlines security
   considerations for documents that do not specify protocols.
-->


11) <!-- [rfced] FYI - We lowercased "post-stack data" and "in-stack data" per
usage in RFC-to-be 9789 (ietf-mpls-mna-fwk).
-->


12) <!-- [rfced] Abbreviations

a) This document uses "Ingress to Edge" as the expansion for I2E, but
RFC-to-be 9789 (ietf-mpls-mna-fwk) and other documents in the RFC Series
use "Ingress to Egress". If no objections, we will update this document
accordingly.

Current:
Ingress to Edge

Perhaps:
Ingress to Egress


b) FYI - We have added expansions for the following abbreviations
per Section 3.6 of RFC 7322 ("RFC Style Guide"). Please review each
expansion in the document carefully to ensure correctness.

Deterministic Networking (DetNet)
Segment Routing over IPv6 (SRv6)
Segment Routing over MPLS (SR-MPLS)
Service Level Objectives (SLOs)
-->


13) <!-- [rfced] Please review the "Inclusive Language" portion of the online 
Style Guide <https://www.rfc-editor.org/styleguide/part2/#inclusive_language>
and let us know if any changes are needed.  Updates of this nature typically
result in more precise language, which is helpful for readers.

Note that our script did not flag any words in particular, but this should 
still be reviewed as a best practice.
-->


Thank you.

RFC Editor/rv


On May 13, 2025, at 9:31 PM, rfc-edi...@rfc-editor.org wrote:

*****IMPORTANT*****

Updated 2025/05/13

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--------------------------------------
RFC9791 (draft-ietf-mpls-mna-usecases-15)

Title            : Use Cases for MPLS Network Action Indicators and MPLS 
Ancillary Data
Author(s)        : T. Saad, K. Makhijani, H. Song, G. Mirsky
WG Chair(s)      : Tarek Saad, Tony Li, Adrian Farrel

Area Director(s) : Jim Guichard, Ketan Talaulikar, Gunter Van de Velde

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