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

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Date:	Tue, 24 Dec 2013 21:45:05 +0900
From:	Toshiaki Makita <makita.toshiaki@....ntt.co.jp>
To:	Alexandre DERUMIER <aderumier@...so.com>
Cc:	netdev@...r.kernel.org
Subject: Re: bridge vlan_filtering don't work with tap devices (qemu guests)

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
> --
> To unsubscribe from this list: send the line "unsubscribe netdev" in
> the body of a message to majordomo@...r.kernel.org
> More majordomo info at  http://vger.kernel.org/majordomo-info.html


--
To unsubscribe from this list: send the line "unsubscribe netdev" in
the body of a message to majordomo@...r.kernel.org
More majordomo info at  http://vger.kernel.org/majordomo-info.html