Reviewer: Yingzhen Qu Review result: Ready 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 the 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. The document is almost ready for publication. However I believe that some refinement in the language will significantly enhance the document's readability. For example, I tried some editorial work with the Abstract, and I'll leave this to the authors and RFC editor. " The MPLS ping and traceroute mechanism outlined in RFC 8029, along with associated extensions for Segment Routing (SR) as detailed in RFC 8287, serve as valuable tools for verifying control plane and data plane synchronization. However, in certain environments, not all intermediate or transit nodes support these validation procedures. A straightforward MPLS ping and traceroute mechanism enables traversal of any path without validating the control plane state. RFC 8029 facilitates this mechanism through Nil Forwarding Equivalence Class (FEC). However, challenges arise when all labels in the label stack utilize Nil FEC. This document presents a novel Type-Length-Value (TLV) as an extension to the existing Nil FEC. It outlines MPLS ping and traceroute procedures utilizing Nil FEC with this extension to effectively overcome these challenges. " There are a few nits that should be fixed: 32 extension to exisiting Nil FEC. It describes MPLS ping and nits: s/exisiting/existing 122 Mutiple Paths (ECMP) and validate each of the ECMP paths. The use of s/Mutiple/Multiple 188 used for Egress TLV is from the range 32768-65535 and can can be nits: duplicate "can" 189 silently dropped if not recognised as per [RFC8029] and as per s/recognised/recognized -- last-call mailing list -- last-call@xxxxxxxx To unsubscribe send an email to last-call-leave@xxxxxxxx
