Date: Sat, 23 Feb 2019 09:29:50 +0000 From: "Scheffenegger, Richard" <Richard.Scheffenegger@netapp.com> To: "freebsd-transport@freebsd.org" <freebsd-transport@freebsd.org>, Michael Tuexen <tuexen@freebsd.org> Subject: DSACK Message-ID: <SN4PR0601MB3728752D55B7231BC4CF22B586780@SN4PR0601MB3728.namprd06.prod.outlook.com>
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Hi, A colleague pointed me to the stack (HEAD) no longer emitting DSACK options= a few days ago... I was under the impression, that older versions of FreeBSD would send out D= SACKs for spurious duplicate packets. But when I try this script against HEAD, regular cumulative ACKs without DS= ACK blocks are showing up. Currently bandwidth starved - but was that a conscious decision? Or was me = observing DSACKs never a thing? Thanks a lot, Richard
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