Re: [quicwg/base-drafts] ECN verification text (#2752)

Gorry Fairhurst <> Thu, 23 May 2019 10:02 UTC

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From: Gorry Fairhurst <>
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Subject: Re: [quicwg/base-drafts] ECN verification text (#2752)
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gorryfair commented on this pull request.

>  If verification fails, then the endpoint ceases setting ECT codepoints in
 subsequent IP packets with the expectation that either the network path or the
 peer does not support ECN.
-If an endpoint sets ECT codepoints on outgoing IP packets and encounters a
-retransmission timeout due to the absence of acknowledgments from the peer (see
-{{QUIC-RECOVERY}}), or if an endpoint has reason to believe that an element on
-the network path might be corrupting ECN codepoints, the endpoint MAY cease
-setting ECT codepoints in subsequent packets.  Doing so allows the connection to
-be resilient to network elements that corrupt ECN codepoints in the IP header or
-drop packets with ECT or CE codepoints in the IP header.
+If an ECT codepoint set is not dropped or corrupted by a network device, then a

"set" doesn't mean anything to me regarding this 2-bit code point, is this a non-zero codepoint? (i.e. not not-ECT)

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