Configuring The Device To Tag Native Vlan Traffic - Cisco 7206 - VXR Router Configuration Manual

Configuring Access and Trunk Interfaces
S e n d d o c u m e n t c o m m e n t s t o n e x u s 7 k - d o c f e e d b a c k @ c i s c o . c o m

Configuring the Device to Tag Native VLAN Traffic

When you are working with 802.1Q trunked interfaces, you can maintain the tagging for all packets that
enter with a tag that matches the value of the native VLAN ID and drops all untagged traffic (you will
still carry control traffic on that interface). This feature applies to the entire device; you cannot apply it
to selected VLANs on a device.
The vlan dot1q tag native global command changes the behavior of all native VLAN ID interfaces on
all trunks on the device.
If you enable 802.1Q tagging on one device and disable it on another device, all traffic is dropped on the
Note
device with this feature disabled. You must configure this feature identically on each device.
BEFORE YOU BEGIN
Ensure that you are in the correct VDC (or use the switchto vdc command). You can repeat VLAN
names and IDs in different VDCs, so you must confirm that you are working in the correct VDC.
SUMMARY STEPS
1.
2.
3.
4.
5.
Cisco Nexus 7000 Series NX-OS Interfaces Configuration Guide, Release 5.x
3-20
configure terminal
vlan dot1q tag native
exit
(Optional) show vlan
(Optional) copy running-config startup-config
Chapter 3 Configuring Layer 2 Interfaces
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