I have reviewed this document as part of the security directorate's ongoing effort to review all IETF documents being processed by the IESG. These comments were written primarily for the benefit of the security area directors. Document editors and WG chairs should treat these comments just like any other last call comments. This document describes a deterministic network data plane when time-sensitive networks are interconnected. The security considerations section seems adequate though the integration of a protocol (TSN) on top of another protocol (DetNet/MPLS) sometimes can yield new results so it is just a question to the authors if no new security consideration results from the application of TSN over DetNet/MPLS? Editorial: - "TSN" is used as an acronym in the abstract as is DetNet (and MPLS, although that is perhaps more common knowledge). Would be goot to spell out these acronyms directly in the abstract. - Section 6, "challanges" -> "challenges" - Section 6, "are member" -> "are members" Thanks, -- Magnus