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. The draft is Ready with nits This document defines a new Flexi-Grid value for Lambda Switch Capable (LSC) Label Switching Routers. The specification of this new label references an external (ITU) specification. The security considerations of this document properly refers to other documents, such as RFC3471, RFC3473 and RFC5920. No new security issues are introduced in this document, as it merely defines a new label to use which causes no backwards compatibility issues. nits: -- The document seems to lack a disclaimer for pre-RFC5378 work, but may have content which was first submitted before 10 November 2008. If you have contacted all the original authors and they are all willing to grant the BCP78 rights to the IETF Trust, then this is fine, and you can ignore this comment. If not, you may need to add the pre-RFC5378 disclaimer. (See the Legal Provisions document at http://trustee.ietf.org/license-info for more information.) Paul