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 primarily for the benefit of the operational area directors. Document editors and WG chairs should treat these comments just like any other last call comments.   I have some questions for the proposed AVPs by this document. -           The ECN is marked on packets by network nodes in the middle. Is it the Receiver of ECN marked data packets sending the proposed AVPs to the Diameter Server? -           If no ECN marked data packets are received, does it mean the receiver won’t send the AVPs being proposed by the draft? -           Diameter is the protocol for Authentication, Authorization, and Accounting.  Is it the “originator” sending the AAA request? If yes, the “Originator” may not even have any ECN marked packets, how does the flow “Originator” constructed the proposed AVPs?   Thank you.   Linda Dunbar