netdev - bridge vlan_filtering don't work with tap devices (qemu guests)

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Date:	Mon, 23 Dec 2013 17:02:40 +0100 (CET)
From:	Alexandre DERUMIER <aderumier@...so.com>
To:	netdev@...r.kernel.org
Subject: bridge vlan_filtering don't work with tap devices (qemu guests)

Hello,

I'm trying to use vlan_filtering on bridge.

setup is : 2 qemu virtual machines (tap0 and tap1), plugged in a bridge br0.
           virtual machines don't tag packets.


qemuvm1 eth0 --tap0----->br0<-------tap1---qemuvm2 eth0.


with vlan_filtering disable, both vms can ping together.


If I enabled filtering

#echo 1 > /sys/class/net/br0/bridge/vlan_filtering

Both vms cannot ping together anymore.

So, I have tried to put vlan on tap interfaces with

#bridge vlan add dev tap0 vid 10
#bridge vlan add dev tap1 vid 10
#bridge vlan show
port	vlan ids
br0	None
tap0	10
tap1    10



But, it doesn't work.

tcpdump on bridge (tcpdump -i br0 -e -n) or in destination qemu (tcpdump -i eth0 -e -n) , don't see any packet

any idea ? 

Regards,

Alexandre Derumier
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