DOT1Q NATIVE VLAN STANDARD or NON-STANDARD

From: Ed Lui (edwlui@gmail.com)
Date: Wed Oct 12 2005 - 13:02:31 GMT-3

Hi group,
I have no luck finding out why we need native vlan in dot1q. I understand
that native vlan should be defined on a trunk port. I came across a router
on a stick lab scenario, which I did not define the native vlan and it is
still working fine. Read through the dot1q standard on
ieee.org<http://ieee.org>but still can not figure out my question.
 So, what is the difference between having a native and not having a native
vlan defined ? The only thing I can think of is, tagged frame can carry QoS
information. Other than that, what is the benefit or difference between
tagged and untagged frames ? Why define a native ?

Thanks in advance for any help or hint,

Ed Lui

TRUNK W/O NATIVE VLAN
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