[mpls] draft-ietf-mpls-mna-ioam-07 early Perfmetrdir review

[Giuseppe Fioccola via Datatracker <[e-mail]>]

Document: draft-ietf-mpls-mna-ioam
Title: Supporting In Situ Operations, Administration, and Maintenance Using
MPLS Network Actions Reviewer: Giuseppe Fioccola Review result: Has Issues

This document specifies how to employ MNA (MPLS Network Actions) mechanism to
collect and transport IOAM and IOAM-DEX data.

>From a PERFMETRDIR point of view, the performance measurement method is defined
quite clearly. But, I have general comments for your consideration:

- Section 3 says that the procedure to carry IOAM using the MNA solution can be
applied to user traffic packets and active measurement test packets. In this
regard, I would also add a reference to
draft-ietf-ippm-on-path-active-measurements, where this combination is
generalized for all the active tools.

- In section 4.1, the first sentence is not very clear. I would better clarify
whether Figure 1 shows an example of Post-Stack MPLS Header Carrying IOAM and
IOAM-DEX.

- In section 4.1, 4.1.1, 4.1.1.1, 4.2 and 4.2.1 there are several fields (e.g.
TC, S, TTL) that are not described. Maybe, you can simply add them to the
Acronyms of section 2.1 or refer to draft-ietf-mpls-mna-ps-hdr.

- Section 5 could also be merged with section 6 on Operational Considerations
since there are many considerations related to deployment, operations, and
management.