Hi! I have reviewed this document as part of the Operational directorate's ongoing effort to review all IETF documents being processed by the IESG.  These comments were written with the intent of improving the operational aspects of the IETF drafts. Comments that are not addressed in last call may be included in AD reviews during the IESG review.  Document editors and WG chairs should treat these comments just like any other last call comments. This document is on the Informational Track to specify ways for client and server to establish common finite-field DH parameters with known structure and a mechanism for peers to negotiate support for these groups.   The document is well written and very clear.   A couple questions: 1)     Why this document is not standard track? 2)     Several sections requests range in reference of p, e.g.  “p-1” or p (Section 5). But there are so many numbers that can be “p” (page 17). What is the significance of the range?     Cheers,   Linda Dunbar