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Date:      Thu, 26 Sep 2019 04:20:49 +0000
From:      bugzilla-noreply@freebsd.org
To:        net@FreeBSD.org
Subject:   [Bug 240825] Vlan interfaces does not work on lagg from em0, em1
Message-ID:  <bug-240825-7501-gmFcRLHJlu@https.bugs.freebsd.org/bugzilla/>
In-Reply-To: <bug-240825-7501@https.bugs.freebsd.org/bugzilla/>
References:  <bug-240825-7501@https.bugs.freebsd.org/bugzilla/>

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https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=3D240825

Eugene Grosbein <eugen@freebsd.org> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|New                         |Open
                 CC|                            |eugen@freebsd.org,
                   |                            |gallatin@FreeBSD.org,
                   |                            |jhb@FreeBSD.org,
                   |                            |mav@FreeBSD.org

--- Comment #2 from Eugene Grosbein <eugen@freebsd.org> ---
>From console.log at boot time:

lagg0.11: flags=3D8843<UP,BROADCAST,RUNNING,SIMPLEX,MULTICAST> metric 0 mtu=
 1496
        options=3D403<RXCSUM,TXCSUM,LRO>
        ether 00:e0:81:ba:ad:90
        inet xx.xx.170.82 netmask 0xfffffff0 broadcast xx.xx.170.95
        groups: vlan
        vlan: 11 vlanpcp: 0 parent interface: lagg0
        media: Ethernet autoselect
        status: active
        nd6 options=3D29<PERFORMNUD,IFDISABLED,AUTO_LINKLOCAL>

mtu=3D1496 for lagg0.11 (while mtu=3D1500 for lagg0) means that vlan was cr=
eated
while lagg0 had no registered members with hardware vlan support. This is v=
ery
strange.

It looks like some race condition at boot time between internal lagg
configuration and another ifconfig process creating vlan over lagg.

Adding CC: for some people that worked with lagg(4) code recently.

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