I have reviewed this document as part of the Operational directorate's ongoing effort to review all IETF documents being processed by the IESG.  These comments were written with the intent of improving the operational aspects of the IETF drafts. Comments that are not addressed in last call may be included in AD reviews during the IESG review.  Document editors and WG chairs should treat these comments just like any other last call comments.

This document extends MPLS Ping and Traceroute mechanism from one single domain to multi-domain, multi-AS and provide end to end path tracing and reachability checking across SR MPLS data plane.

I have read the v-(17), my comments on v-(14) in the previous OPS-DIR review have been addressed. Thanks for rearranging sectgion 6,7,8.
However one additional comment I have is A-flag is well specified in section 4.4, however it is not clear on how A-flag is used in the detailed procedure and detailed example section.