Be ye not afraid... 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: LGTM. Version reviewed: Conveying Vendor-Specific Constraints in the Path Computation Element communication Protocol draft-ietf-pce-vendor-constraints-11.txt Notes: I did *not* perform a formal language check. At a quick glance it looks good though. Nits: I would like to have a table of contents. This may be a personal preference though…. While performing this review I kept thinking "Mwahaha. This can be used to carry arbitrary information with any PCEP object that supports TLVs.... I can kvetch about the DoS potential". But, the authors foiled my plan to rant by mentioning this in the Security Considerations section and even mentioning a mitigation. Curses! Foiled again. W -- Outside of a dog, a book is your best friend, and inside of a dog, it's too dark to read