netdev - Re: [Bridge] Can linux kernel bridge forward 802.1q tagged vlan packets?

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Date:	Thu, 22 Aug 2013 23:49:41 +0200
From:	Marek Kierdelewicz <marek@...sta.pl>
To:	Stephan von Krawczynski <skraw@...net.com>
Cc:	bridge@...ts.linux-foundation.org, netdev@...r.kernel.org
Subject: Re: [Bridge] Can linux kernel bridge forward 802.1q tagged vlan
 packets?

Hi,

>My general idea is to bridge tagged vlan packets from a physical
>interface (intel) to a virtual interface (virtio in qemu) and not
>losing the tags, so the qemu guest can use vconfig and friends to get
>some vlan interfaces. Is this possible and are there any additional
>steps necessary besides the usual bridge configuration?

I'm using this setup with KVM virtualization (Qemu's successor). It
didn't work with default nic type for guest (realtek I think) as 802.1q
tags were not preserved properly in one of the directions. I don't
remember specifics. Anyway using e1000 driver instead of default fixed
it. Works like a charm.

Best regards,
Marek Kierdelewicz
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