I am the assigned Gen-ART reviewer for this draft. The General Area Review Team (Gen-ART) reviews all IETF documents being processed by the IESG for the IETF Chair. Please treat these comments just like any other last call comments. For more information, please see the FAQ at . Document: draft-ietf-teas-yang-te-topo-20 Reviewer: Russ Housley Review Date: 2019-05-02 IETF LC End Date: 2019-05-15 IESG Telechat date: Unknown Summary: Not Ready Major Concerns: See https://trac.ietf.org/trac/ops/wiki/yang-security-guidelines. The Security Considerations section MUST follow the template provided on that web page, and the guidelines require normative references to [RFC5246] and [RFC6536], among others. These two RFCs do not appear in the references. Minor Concerns: None Nits: The TOC contains several lines where the heading goes past the column of page numbers. Reformatting would make this much easier to read.