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[tcpm] ECN++

"Scheffenegger, Richard" <rs.ietf@gmx.at> Fri, 10 January 2020 00:08 UTC

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To: "tcpm@ietf.org" <tcpm@ietf.org>, draft-ietf-tcpm-generalized-ecn@ietf.org
From: "Scheffenegger, Richard" <rs.ietf@gmx.at>
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Date: Fri, 10 Jan 2020 01:08:04 +0100
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Subject: [tcpm] ECN++
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Marcelo, Bob,

I just noted that there is a slight oversight in FreeBSD currently,
which results in all session that are simultaneously ECN-enabled and
SACK-permitted to effectively send out retransmissions with the ECT0
codepoint.

Strictly speaking, this is in violation of RFC3168, but might also be a
good (nearly a decade long) validation of the performance of ECN++ for
all types of data segments (new and retransmitted ones), although at a
low and implicit exposure...


On that note, since I think ECN++ is quite valuable (with a number of
published research finding this change to be crucial), perhaps you can
summarize the outstanding issues (other than more reviewers required; I
admit I still haven't gone through all the delta between -04 and -05).

Best regards,
   Richard

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