netdev - Re: [Bridge] [PATCH 2/3] bridge: Add filtering support for default

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Message-ID: <5417011D.2000301@redhat.com>
Date:	Mon, 15 Sep 2014 11:09:17 -0400
From:	Vlad Yasevich <vyasevic@...hat.com>
To:	Toshiaki Makita <toshiaki.makita1@...il.com>,
	Vladislav Yasevich <vyasevich@...il.com>,
	netdev@...r.kernel.org
CC:	shemminger@...tta.com, bridge@...ts.linux-foundation.org
Subject: Re: [Bridge] [PATCH 2/3] bridge: Add filtering support for default_pvid

On 09/14/2014 11:21 AM, Toshiaki Makita wrote:
> (14/09/13 (土) 5:44), Vladislav Yasevich wrote:
>> Currently when vlan filtering is turned on on the bridge, the bridge
>> will drop all traffic untill the user configures the filter.  This
>> isn't very nice for ports that don't care about vlans and just
>> want untagged traffic.
>>
>> A concept of a default_pvid was recently introduced.  This patch
>> adds filtering support for default_pvid.   Now, ports that don't
>> care about vlans and don't define there own filter will belong
>> to the VLAN of the default_pvid and continue to receive untagged
>> traffic.
> 
> If user sets pvid, then vid 1 (default_pvid) will become non-pvid but
> still not be filtered, right?

Right.

> vlan_bitmap of default_pvid shouldn't be cleared on setting pvid?

I can see arguments for both.  Just because the user wishes to set a
different pvid may not always mean that vlan associated with default pvid
shouldn't be filtered.  I think it's at user's discretion.  I hesitate
to do too many things automatically.

-vlad
> 
> Thanks,
> Toshiaki Makita
> 

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