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Date:      Sun, 01 Jul 2007 18:45:42 +0200
From:      Arne Schwabe <schwabe@uni-paderborn.de>
To:        "Bruce M. Simpson" <bms@FreeBSD.org>
Cc:        cvs-src@FreeBSD.org, src-committers@FreeBSD.org, Andrew Thompson <thompsa@FreeBSD.org>, cvs-all@FreeBSD.org, Slawa Olhovchenkov <slw@zxy.spb.ru>
Subject:   Re: cvs commit: src/sys/net if_bridge.c if_bridgevar.h src/sbin/ifconfig ifbridge.c
Message-ID:  <4687DA36.1010604@uni-paderborn.de>
In-Reply-To: <468772E0.5080406@FreeBSD.org>
References:  <200706131858.l5DIw4Yr009448@repoman.freebsd.org>	<20070701081714.GA44671%slw@zxy.spb.ru> <468772E0.5080406@FreeBSD.org>

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Bruce M. Simpson schrieb:
> Slawa Olhovchenkov wrote:
>> On Wed, Jun 13, 2007 at 06:58:04PM +0000, Andrew Thompson wrote:
>>  
>>>
>>>   All non-tagged traffic is treated as vlan1 as per IEEE 802.1Q-2003
>>>     
>>
>> Common practice: non-tagged traffic is treated as "native vlan".
>>   
> I'm confused now. Is this practice different from what the 802.1Q
> standard says?
>
You can have a tagged Vlan 1 and an untaged (native in cisco speech) on
dot1q port (trunk in cisco speech).  Some standard even uses vlan 0.
Iirc some Qos stuff.

A real world example:

interface GigabitEthernet0/21
 description uplink cat6509-e
 switchport trunk native vlan 506
 switchport trunk allowed vlan 1,323,506

Has a tagged vlan with ID 1 and an untagged vlan with corrosponds to
vlan 506.

I have not looked at diff but if the native vlan or untagged ethernet
frames are treated as vlan 1 this example vlan 1 and vlan 506 would be
mixed.

Arne



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