Re: [quicwg/base-drafts] Largest acked in ACK frame MUST NOT decrease (#2205)

Jana Iyengar <> Wed, 22 May 2019 13:47 UTC

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Subject: Re: [quicwg/base-drafts] Largest acked in ACK frame MUST NOT decrease (#2205)
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I think this is mostly addressed and what's left is OBE. There's text in the draft now that says: "Processing counts out of order can result in verification failure. An endpoint SHOULD NOT perform this verification if the ACK frame is received in a packet with packet number lower than a previously received ACK frame. Verifying based on ACK frames that arrive out of order can result in disabling ECN unnecessarily."

This would be adequate, but there's other text (thanks to #2312) that says old ACKs can be resent. I think we simply add a note about that in the para above, which should be adequate.

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