Re: [quicwg/base-drafts] MUST ACK each ack-eliciting packet once (#3092)

[Martin Thomson <[e-mail]>]

martinthomson commented on this pull request.



> @@ -3007,9 +3007,6 @@ guidance offered below seeks to strike this balance.
 
 ### Sending ACK Frames {#sending-acknowledgements}
 
-An ACK frame SHOULD be generated for at least every second ack-eliciting packet.
-This recommendation is in keeping with standard practice for TCP {{?RFC5681}}.
-
 An endpoint MUST NOT excessively delay acknowledgements of ack-eliciting

I think that we're still missing the "An endpoint MUST send at least one acknowledgment for every packet it receives and successfully processes."  This paragraph is mostly about max ack delay, which is fine, but it only really says that you can't excessively delay.

Sure, you could say that "never send" == "excessive delay", but you could also say that you can't delay something that never existed in the first place.

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