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. Summary: This document clarifies that the applicability of the IANA registry for ULE's (Unidirectional Lightweight Encapsulation) Next Header Type [RFC4326] extends to ETSI's DVB (Digital Video Broadcasting) Generic Stream Encapsulation (GSE) Protocol. As such this document appears to have no security conditions.