As a member of the Operations Directorate, I was asked to review draft-ietf-tcpm-accecn-reqs-07.





 




In general, the draft is written very well. But I think the “requirements” listed in Section 4  is more like “design consideration”. For example, the proposed solution in 5.1 doesn’t meet the “resilience” requirement
 listed in the Section 4. 




 




On the Page 8 under “Timeliness”, the text says “… should be delivered within about one RTT”. But




the earlier sentence describes that it takes longer than one RTT for the  ACK to reach the sender. Here it says that "should be within
 one RTT". Is there any particular value to set for a specific attribute to reach this goal?




 




On the Page 9 under “Accuracy”, the text says: “In the best case the new scheme should even allow reconstruction of the exact number of payload bytes that a CE marked packet was carrying”.





Why not using the value in the Length field of the IP header?





 




Cheers, 




Linda Dunbar