VLAN unaware bridge

VLAN unaware bridge
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Subject Author Date
VLAN unaware bridge Kamaraj 05-05-2008
---> Re: VLAN unaware bridge glen herrmannsf ..05-05-2008
Posted by Kamaraj on May 5, 2008, 1:56 am
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Hello,
Would like to know whehter L2switch is not VLAN aware bridge will
forward VLAN tagged packets to VLAN unaware hosts.

How L2Bridge will act if its receives VLAN tagged packets.

Thanks in Advance.
-Kamaraj

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Posted by glen herrmannsfeldt on May 5, 2008, 4:32 am
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Kamaraj wrote:

> Would like to know whehter L2switch is not VLAN aware bridge will
> forward VLAN tagged packets to VLAN unaware hosts.

As I understand it, there is some possibility that full length
packets, which are four bytes longer than the standard, will be
discarded. I haven't heard that any do that, though.

> How L2Bridge will act if its receives VLAN tagged packets.

Pass them through in the same way as any other packet.

-- glen


Posted by Kamaraj on May 5, 2008, 4:36 am
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> Kamaraj wrote:
> > Would like to know whehter L2switch is not VLAN aware bridge will
> > forward VLAN tagged packets to VLAN unaware hosts.
>
> As I understand it, there is some possibility that full length
> packets, which are four bytes longer than the standard, will be
> discarded. =A0I haven't heard that any do that, though.
>
> > How L2Bridge will act if its receives VLAN tagged packets.
>
> Pass them through in the same way as any other packet.
>
> -- glen
How it will work if the end station is a host not an L2Bridge device.
I mean the end station also VLAN unaware device.

Thanks In Advance

Posted by Arnold Nipper on May 5, 2008, 6:10 am
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On 05.05.2008 10:36 Kamaraj wrote

>> Kamaraj wrote:
>> > Would like to know whehter L2switch is not VLAN aware bridge will
>> > forward VLAN tagged packets to VLAN unaware hosts.
>>
>> As I understand it, there is some possibility that full length
>> packets, which are four bytes longer than the standard, will be
>> discarded. I haven't heard that any do that, though.
>>
>> > How L2Bridge will act if its receives VLAN tagged packets.
>>
>> Pass them through in the same way as any other packet.
>>
>> -- glen
> How it will work if the end station is a host not an L2Bridge device.
> I mean the end station also VLAN unaware device.
>

It works the same way. Though why would you want to connect a vlan
unaware device to a 802.1q/tagged port?


Arnold Nipper
--
Arnold

Posted by glen herrmannsfeldt on May 5, 2008, 2:40 pm
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Kamaraj wrote:
(snip)

>>>Would like to know whehter L2switch is not VLAN aware bridge will
>>>forward VLAN tagged packets to VLAN unaware hosts.
(snip)

>>>How L2Bridge will act if its receives VLAN tagged packets.

>>Pass them through in the same way as any other packet.

> How it will work if the end station is a host not an L2Bridge device.
> I mean the end station also VLAN unaware device.

You have to consider VLAN as part of the network design,
and not connect VLAN unaware devices to ports with VLAN
tags on them destined for that device.

Though these days, there is likely VLAN software for most
operating systems.

-- glen


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