From: C Chan (cch.ccie@gmail.com)
Date: Thu Apr 03 2008 - 01:24:13 ART
Hi expert,
Can anyone explain the meaning of "Administrative Native VLAN tagging:
enabled" when showing trunk/access interface? How would it relate to native
VLAN? and how to control it?
As far as I understand, the native VLAN will not be tagged when passing
through trunk link. However, we can turn on the native VLAN tagging feature
by using command "vlan dot1q tag native". It is useful when dealing with
double tagging of 802.1q-tunnel if the parent VLAN is used as native VLAN.
Pls correct me if I am wrong.
Regards,
CH
SW1#s int po12 swit
Name: Po12
Switchport: Enabled
Administrative Mode: *trunk*
Operational Mode: trunk
Administrative Trunking Encapsulation: dot1q
Operational Trunking Encapsulation: dot1q
Negotiation of Trunking: On
Access Mode VLAN: 1 (default)
Trunking Native Mode VLAN: 1 (default)
Administrative *Native VLAN tagging: enabled*
SW1#s int fa0/1 swit
Name: Fa0/1
Switchport: Enabled
Administrative *Mode: static access*
Operational Mode: static access
Administrative Trunking Encapsulation: negotiate
Operational Trunking Encapsulation: native
Negotiation of Trunking: Off
Access Mode VLAN: 148 (VLAN0148)
Trunking Native Mode VLAN: 1 (default)
Administrative *Native VLAN tagging: enabled*
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