Configuring The Native Vlan For Untagged Traffic - Cisco WS-C2950-24 Configuration Manual

Chapter 8 Configuring VLANs

Configuring the Native VLAN for Untagged Traffic

Note
Command
Step 1
configure terminal
Step 2 interface interface-id
Step 3
switchport trunk native vlan
vlan-id
Step 4
show interface interface-id
switchport
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A trunk port configured with 802.1Q tagging can receive both tagged and
untagged traffic. By default, the switch forwards untagged traffic with the native
VLAN configured for the port. The native VLAN is VLAN 1 by default.
The native VLAN can be assigned any VLAN ID, and it is not dependent on
the management VLAN.
For information about 802.1Q configuration issues, see the
Configuration Considerations" section on page
Beginning in privileged EXEC mode, follow these steps to configure the native
VLAN on an 802.1Q trunk:
Purpose
Enter global configuration mode.
Enter interface configuration mode, and define the
interface that is configured as the 802.1Q trunk.
Configure the VLAN that is sending and receiving
untagged traffic on the trunk port.
Valid IDs are from 1 to 1001.
Verify your settings.
If a packet has a VLAN ID the same as the outgoing port native VLAN ID, the
packet is transmitted untagged; otherwise, the switch transmits the packet with
a tag.
Catalyst 2900 Series XL and Catalyst 3500 Series XL Software Configuration Guide
How VLAN Trunks Work
"IEEE 802.1Q
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