Hi,

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 with the intent of improving
security requirements and considerations in IETF drafts.  Comments
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.

Summary:

* Has Nits

Details:

* You have a typo at the bottom of Page 15:
   [RFC8701]).  Implemenations SHOULD select reserved values at random

  I am guessing this should be "Implementations"  :)

* Quick question: Is there no MTI token type?  I would have expected
  at least ONE, unless your expectation are the greased values are
  your MTIs?

-derek

-- 
       Derek Atkins                 617-623-3745
       derek@ihtfp.com             www.ihtfp.com
       Computer and Internet Security Consultant