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Date:      Wed, 31 May 2017 21:32:40 +0000
From:      bugzilla-noreply@freebsd.org
To:        freebsd-virtualization@FreeBSD.org
Subject:   [Bug 219672] vmxnet3: with LRO enabled under FreeBSD 11 as a router,  outgoing speed of forwarded traffic becomes slower
Message-ID:  <bug-219672-27103-OcFryhqTjD@https.bugs.freebsd.org/bugzilla/>
In-Reply-To: <bug-219672-27103@https.bugs.freebsd.org/bugzilla/>
References:  <bug-219672-27103@https.bugs.freebsd.org/bugzilla/>

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https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=3D219672

Maxim Masiutin <max@ritlabs.com> changed:

           What    |Removed                     |Added
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                 CC|                            |max@ritlabs.com

--- Comment #1 from Maxim Masiutin <max@ritlabs.com> ---
It should be emphasized that the speed drops are very significant.

I have done tests on a gigabit internet connection from our server to a ser=
ver
of our ISP:

with LRO disabled
ping: 2.01ms, download: 235.13 Mbps, upload 410.41 Mbps

with LRO enabled
ping: 2.01ms, download: 149.73 Mbps, upload 0.80 Mbps

Ping remained the same and download almost the same, but upload dropped from
410 Mbps to 0.80 Mbps - 512 times drop!

And remote desktop connections are practically unusable, with frequent
connection drops.

I suspect that there is a bug, because if it would have been a simple
misconfiguration, the speed drop would not have been so huge.

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