I am the assigned Gen-ART reviewer for draft-ietf-avtext-rtp-duplication-04



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Please resolve these comments along with any other Last Call comments 


you may receive.






Summary: This draft is almost ready for publication as a Proposed 


Standard but I have one issue that probably needs further clarification 


in the draft.




* Section 7

I am not sure how the following MUST NOT is testable.

"First of all, RTP duplication MUST NOT be used
 in cases where the primary cause of packet loss is congestion since
 duplication can make congestion only worse."



I my understanding (correct me if I am wrong) neither the source of the 


duplication nor the destination will know whether the packet loss was 


due to congestion or something else. Can you please clarify how this 


"MUST NOT" would be followed?




Thanks
Suresh