Re: bridge vlan_filtering don't work with tap devices (qemu guests)

[Toshiaki Makita <makita.toshiaki@lab.ntt.co.jp>]

On Mon, 2013-12-23 at 17:02 +0100, Alexandre DERUMIER wrote:
> 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

If you want to send untagged frames, please try to make configuration
like this:
# bridge vlan add dev tap0 vid 10 pvid untagged
# bridge vlan add dev tap1 vid 10 pvid untagged

Thanks,
Toshiaki Makita

> #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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