Hello,  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 intended status of this document is Informational. The document  defines an information model for recording interactions between elements implementing the "Interface to the Routing Systemn" (I2RS) protocol.It  describes a framework for traceability in the I2RS. The Nits tool found an outdated reference: == Outdated reference: A later version (-15) exists of draft-ietf-i2rs-architecture-13 The document is well written. As section 5.2 is labeled "I2RS Trace Log Mandatory Fields", I am wondering whether it is allowed to have additional optional fields. For example an optional "Additional Text" field may be useful, to provide additional information in certain situations. I have no issues with the document. Thank you kindly, Menachem Dodge