The MPLS-OPS Archive

["Vinay Bannai" <bannai@pacbell.net>]

Edmund,

 

The concept of native VLAN and untagged traffic is not new and it used quite a bit with VLAN-L2 devices.

My understanding of native VLAN as it applies to untagged traffic is as follows:

- A native VLAN is something which is assigned globally to a switch

- On trunk port, you can get both tagged and untagged traffic

- The untagged traffic is assigned to a native VLAN group

- The untagged traffic is then forwarded to the ports on this native VLAN

 

I am not exactly sure if this behavior is uniform across all vendors, but this is something that is prevalent on the Cisco switches.

 

Vinay

-----Original Message-----
From: Mourad BERKANE [mailto:mourad.berkane@lambdanet.fr]
Sent: Friday, May 30, 2003 1:49 AM
To: 'Edmund Kueh / ICN Malaysia'
Cc: mpls-ops@mplsrc.com
Subject: RE: [MPLS-OPS]: VLAN untagged and native frames

>> VLAN untagged

 

Never heard before, VLAN untagged is a joke (or a new 802 standard) :-)

 

what can i say is that if you tunnel (via a pair of LSPs or via L2VPN/VPLS) an ethernet traffic (tagged or not), you could configure on your PEs ethernet interfaces the encapsulation as follow:

 

- 802.1q ("native frames", you must specify all VLAN ID you would like to tunnel)

- untagged (it is a transparent service, your traffic could be tagged or not)

 

hope this help

 

Regards,

Mourad

-----Message d'origine-----
De : Edmund Kueh / ICN Malaysia [mailto:Edmund.Kueh@siemens.com]
Envoy¨¦ : vendredi 30 mai 2003 03:36
À : mpls-ops@mplsrc.com
Objet : [MPLS-OPS]: VLAN untagged and native frames

Hello

 

Anyone know whats the difference between VLAN untagged and native frames ?

 

If a frame with VLAN ID = 0, do u call it, VLAN untagged or native frame ?

 

Greetings
Edx

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