netdev - Re: bonding (IEEE 802.3ad) not working with qemu/virtio

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Date:	Thu, 28 Jan 2016 14:33:50 +0100
From:	Jiri Pirko <jiri@...nulli.us>
To:	Bjørnar Ness <bjornar.ness@...il.com>
Cc:	netdev <netdev@...r.kernel.org>
Subject: Re: bonding (IEEE 802.3ad) not working with qemu/virtio

Mon, Jan 25, 2016 at 05:24:48PM CET, bjornar.ness@...il.com wrote:
>As subject says, 802.3ad bonding is not working with virtio network model.
>
>The only errors I see is:
>
>No 802.3ad response from the link partner for any adapters in the bond.
>
>Dumping the network traffic shows that no LACP packets are sent from the
>host running with virtio driver, changing to for example e1000 solves
>this problem
>with no configuration changes.
>
>Is this a known problem?

I believe the problem is virtio_net for obvious reasons does not report
speed and duplex. Bonding 3ad mode makes that unconfortable :)

Use team ;)