Bug 235959 - DSACK not working
Summary: DSACK not working
Status: Closed FIXED
Alias: None
Product: Base System
Classification: Unclassified
Component: kern (show other bugs)
Version: CURRENT
Hardware: Any Any
: --- Affects Only Me
Assignee: Michael Tuexen
URL:
Keywords:
Depends on:
Blocks:
 
Reported: 2019-02-23 10:46 UTC by Richard Scheffenegger
Modified: 2019-06-20 07:55 UTC (History)
2 users (show)

See Also:
tuexen: mfc-stable12+

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Description Richard Scheffenegger freebsd_committer freebsd_triage 2019-02-23 10:46:28 UTC 
FreeBSD claims compliance with RFC2883 (DSACK) 
https://wiki.freebsd.org/action/login/TransportProtocols/tcp_rfc_compliance

but a recent test on HEAD does not show the transmission of DSACK blocks on deliberatly sent, duplicate data segments.

The bug may exist in older releases already, can not check currently.

tuexen@ may have an update on this too.