I am the assigned Gen-ART reviewer for this draft. For background on Gen-ART, please see the FAQ at < http://wiki.tools.ietf.org/area/gen/trac/wiki/GenArtfaq>. Please resolve these comments along with any other Last Call comments you may receive. Document: draft-ietf-mpls-self-ping-04 Reviewer: Russ Housley Review Date: 2014-09-25 IETF LC End Date: 2014-10-02 IESG Telechat date: unknown Summary: Ready. Major Concerns: None. Minor Concerns: None. Other Comments: At the end of Section 1, the document says: "Each protocol listens on its own UDP port and executes its own unique procedures." What does "unique" mean here? What changes if "unique" is dropped from this sentence? Would it be more obvious to the reader the purpose of Section 6 if it were turned into an appendix?