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Date:      Sat, 29 Sep 2018 15:30:42 +0000
From:      bugzilla-noreply@freebsd.org
To:        net@FreeBSD.org
Subject:   [Bug 230996] em/igb: Intel i210/i350: ifconfig: enabling "vlanhwtag" renders VLAN on i210/i350 NICs unusable
Message-ID:  <bug-230996-7501-pmIGfAHEyd@https.bugs.freebsd.org/bugzilla/>
In-Reply-To: <bug-230996-7501@https.bugs.freebsd.org/bugzilla/>
References:  <bug-230996-7501@https.bugs.freebsd.org/bugzilla/>

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https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=3D230996

Lev A. Serebryakov <lev@FreeBSD.org> changed:

           What    |Removed                     |Added
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                 CC|                            |lev@FreeBSD.org

--- Comment #1 from Lev A. Serebryakov <lev@FreeBSD.org> ---
I have very similar problem: igb/I210, FreeBSD 12-ALPHA8 (r339009).
When I enable "vlanhwtag" on server, clients on this VLAN receive UDP with
broken checksums.=20
For example, client can not obtain address via DHCP from server with enabled
"vlanhwtag", because DHCP client doesn't seen answers, because they are dro=
pped
by kernel due to invalid checksum: tcpdump sees DHCPOFFER on cleint's inter=
face
but dhclient doesn't receive anything.

--=20
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