[mpls] Re: Working Group Adoption Poll on draft-mb-mpls-ioam-dex

[Greg Mirsky <[e-mail]>]

Dear All,
a short update on the new version of the draft. The authors discussed
questions about the format of optional fields (Flow ID and Sequence
Number). The new version proposes the following format:

    0                   1                   2                   3
    0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1
   +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
   |1|         Namespace-ID          |    Resv   |S|     Flags     |
   +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
   |1|            IOAM-Trace-Type-MNA            |S|O|R| Ext-Flags |
   +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
   |                     Flow ID MNA (Optional)                    |
   +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
   |                 Sequence Number MNA (Optional)                |
   +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+

         Figure 1: IOAM Direct Export Option Type Format in an MPLS
                          Network Action Framework

and defined as following:

   *  Flow ID MNA is an optional four-octet field.  The semantics of the
      Flow ID MNA field is as of the Flow ID field defined in
      Section 3.2 of [RFC9326].  The most significant bit MUST be set to
      1.  Bit 23 MUST be set according to the definition of Bottom of
      Stack field in [RFC3032].

   *  Sequence Number MNA is an optional four-octet field.  The
      semantics of the Sequence Number MNA field is as of the Sequence
      Number field defined in Section 3.2 of [RFC9326].  The most
      significant bit MUST be set to 1.  Bit 23 MUST be set according to
      the definition of Bottom of Stack field in [RFC3032].  In MPLS
      network environments where a label stack information is used for
      load-balancing flows, the 19-bit-long part of the Sequence Number
      MNA, starting from the Bit 1 position of the LSE, MUST remain
      immutable for a particular packet flow that the value of the Flow
      ID MNA field identifies.  In MPLS networks, where other load-
      balancing techniques are used, all bits of the Sequence Number MNA
      field can be variated.


Your questions and comments are always welcome and greatly appreciated.


Regards,

Greg (on behalf of the authors)


On Mon, Oct 7, 2024 at 8:47 AM <[e-mail]> wrote:

> Dear WG,
>
>
>
> This email starts a two-week poll on adopting draft-mb-mpls-ioam-dex as a
> MPLS working group document.
>
>
>
> Please send your comments (support/not support) to the MPLS working group
> mailing list ([e-mail])
>
> Please give a technical motivation for your support/not support,
> especially if you think that the document
>
> should not be adopted as a working group document.
>
>
>
> Currently, there is no IPR disclosure against this document.  All the
> authors/contributors have stated on
>
> the MPLS WG mailing list that they are unaware of any undisclosed IPRs
> that relates to this document.
>
>
>
> This working group adoption poll ends October 22nd, 2024.
>
>
>
> Regards,
>
>
>
> Nic (as MPLS WG Co-chair)
>
>
>