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 the allowance for the extended optional parameters in BGP to be greater than 255. As written, the document is straightforward and on point. I only have an editorial nit and a suggestion. NIT: Section 2: 1st sentence of the 7th paragraph "that in the..." Needs to be fixed. Should it be: "that is in the..."? Suggestion: - As new drafts need to include security and privacy considerations, I think it would be good to just add in the security section (5) that it doesn't change both underlying security or privacy issues as noted in RFC5272.