Re: [ippm] WGLC for draft-ietf-ippm-ioam-yang

Dear Authors, et al.,
please kindly consider my notes as the WG LC comments on the draft:

   - I read the document and left with a general question about the
   applicability of this YANG model. Is it to be applied at:
      - ingress IOAM node
      - ingress and egress IOAM nodes
      - ingress, egress, and transit IOAM nodes
   - Abstract and the first paragraph of the Introduction section
   characterize IOAM as only collecting the operational data and telemetry
   information in the data packet. That seems like a contradiction with the
   list of IOAM options that include the IOAM Direct Export.
   - The first paragraph of the Introduction is likely to benefit from
   references to documents that define IOAM encapsulation in IPv6 and NSH.
   - The Proof-of-Transit option is listed in the Introduction section. Can
   you give an example or reference of an IETF document that describes the
   applicability of this trace option?
   - It seems like "end to end data" in Section 3.1 should be "edge-to-edge
   data".
   - Can you explain the behavior of a transit IOAM node that receives IOAM
   with Loopback mode/flag? How "the source" is identified in a data packet,
   for example, NSH?
   - What is "active measurement"? Can you provide an example or reference
   to an IETF document that describes active measurements using IOAM?
   - I found only two data plane encapsulations - NSH and IPv6. Does that
   mean that this model is not intended to support IOAM in an MPLS network?
   - Can you point out a part of the YANG model that can be used to control
   a transit IOAM node for the IOAM Direct Export trace option?
   - Nits:
      - s/Edge to Edge/Edge-to--Edge/ per RFC 9197

Regards,
Greg

On Tue, Aug 9, 2022 at 9:15 AM Tommy Pauly <tpauly=
40apple.com@dmarc.ietf.org> wrote:

> Hello IPPM,
>
> This email starts a Working Group Last Call for draft-ietf-ippm-ioam-yang.
>
> https://datatracker.ietf.org/doc/draft-ietf-ippm-ioam-yang/
> https://www.ietf.org/archive/id/draft-ietf-ippm-ioam-yang-04.html
>
> Please review this document, and reply to this email to indicate your
> comments, and if you support publishing this document.
>
> The last call will go until *Wednesday, August 31*.
>
> Best,
> Tommy & Marcus
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