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Date:      Wed, 25 May 2022 10:20:24 +0000
From:      bugzilla-noreply@freebsd.org
To:        virtualization@FreeBSD.org
Subject:   [Bug 264198] bridge, ipfw: very slow network on bridge with IPFW, virtio or vtnet on 12.3-RELEASE-p5
Message-ID:  <bug-264198-27103-orQr1ApLsQ@https.bugs.freebsd.org/bugzilla/>
In-Reply-To: <bug-264198-27103@https.bugs.freebsd.org/bugzilla/>
References:  <bug-264198-27103@https.bugs.freebsd.org/bugzilla/>

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https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=3D264198

--- Comment #7 from punkt.de Hosting Team <mops@punkt.de> ---
First, if vtnet0 is a member of bridge0, you must remove the IP address
configuration from vtnet0 and only configure it "up", then put the IP addre=
ss
on bridge0.
Mandatory - documented in the FreeBSD handbook, chapter on bridging.

Second, could you try

  ifconfig vtnet0 -rxcsum -txcsum

please and test if that changes anything?

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