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Date:	Thu, 2 Feb 2012 09:09:01 +0000 (GMT)
From:	Leonardo Uzcudun <>
To:	Michal Soltys <>
Cc:	yao zhao <>,
	Eric Dumazet <>,
	"" <>
Subject: Re: VLAN 1 - Native

Hello Michal:

It is working on kernel 3.0.0-15 Ubuntu. I've just to modify the ebtables command as:
ebtables -t broute -A BROUTING -i eth0 -p 802_1Q --vlan-id 101 -j DROP (protocol is a must when you use --vlan-id)

I'll test it on kernel 2.6.32-5 Debian

Just last question,in the case i should implement this kind of configuration in a kernel 2.6.31, should i backport/patch anything? is it a bad idea (running it on 2.6.31)?

Thanks again.



----- Messaggio originale -----
Da: Michal Soltys <>
A: Leonardo Uzcudun <>
Cc: yao zhao <>; Eric Dumazet <>; "" <>
Inviato: Mercoledì 1 Febbraio 2012 20:26
Oggetto: Re: VLAN 1 - Native

On 12-02-01 17:44, Leonardo Uzcudun wrote:
> I'm sorry guys but i'm not understanding. Allow me to ask in a different way.
> I've a linux computer with 3 network cards (eth0, eth1 and eth2)
> eth0 is connected to a switch with vlans config.
> eth1 is connected to a network that has VID 1
> eth2 is connected to a network that has VID 101

Assuming you have:

eth0: 1u 101t
eth1: 1u
eth2: 101u

would this work for you ?:

ip link add link eth0 name eth0.101 type vlan id 101
ebtables -t broute -A BROUTING -i eth0 --vlan-id 101 -j DROP
brctl addbr br_vlan_1
brctl addbr br_vlan_101
brctl addif br_vlan_1 eth0 eth1
brctl addif br_vlan_101 eth0.101 eth2

ebtables should make 101 tagged traffic go through br_vlan_101 instead 
of br_vlan_1

I think there's also option for doing it with single bridge interface 
and some more complex ebtables rules, but the above if I didn't miss 
anything, should work fine.

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