netdev - Re: Problem with VLANs and via-velocity driver

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Date:	Fri, 13 Nov 2009 12:40:05 +0100
From:	Séguier Régis <rseguier@...eleport.net>
To:	Patrick McHardy <kaber@...sh.net>
CC:	Kevin Shanahan <kmshanah@...enchant.net>, netdev@...r.kernel.org
Subject: Re: Problem with VLANs and via-velocity driver

Patrick McHardy a écrit :
>
>>> There's some special-casing for VID 0 in velocity_init_cam_filter().
>>> Does "ip link add link eth0 type vlan id 0" make any difference?
>>> If not, does "ip link set eth0 promisc on"?
>>>   
>>>       
>> When we patch the driver to support multiple vlan, we decide to use the
>> vlan 0 to desactivate the vlan filtering.
>>     
>
> Why? The usual behaviour is to receive both tagged and untagged
> frames.
>   
We decide this with françois as an alternative to desactivate the NIC 
vlan filtering instead of creating a modul parameter.
The vlan id 0 need to be created but not necessary activate.

In september 2008, we had a discution about exactly the same problem.
You speak about the possibility of an ALLVLAN device flag.

I think i proposed a patch to desactivate NIC vlan filtering when we are 
in promisc mode but not used.
-- 
Régis Séguier
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