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Cisco Nexus 5500 Series NX-OS Layer 2 Interfaces Command Reference
OL-27880-02
Chapter V Commands
vlan dot1Q tag native
vlan dot1Q tag native
To enable dot1q (IEEE 802.1Q) tagging for all native VLANs on all trunked ports on the switch, use the
vlan dot1Q tag native command. To disable dot1q (IEEE 802.1Q) tagging for all native VLANs on all
trunked ports on the switch, use the no form of this command.
vlan dot1Q tag native
no vlan dot1Q tag native
Syntax Description This command has no arguments or keywords.
Command Default Disabled
Command Modes Global configuration mode
Command History
Usage Guidelines Typically, you configure 802.1Q trunks with a native VLAN ID, which strips tagging from all packets
on that VLAN.
To maintain the tagging on the native VLAN and drop untagged traffic, use the vlan dot1q tag native
command. The switch will tag the traffic received on the native VLAN and admit only 802.1Q-tagged
frames, dropping any untagged traffic, including untagged traffic in the native VLAN.
Control traffic continues to be accepted as untagged on the native VLAN on a trunked port, even when
the vlan dot1q tag native command is enabled.
Note The vlan dot1q tag native command is enabled on global basis.
Examples This example shows how to enable 802.1Q tagging on the switch:
switch(config)# vlan dot1q tag native
switch(config)#
This example shows how to disable 802.1Q tagging on the switch:
switch(config)# no vlan dot1q tag native
Turning off vlan dot1q tag native may impact the functioning of existing dot1q tunnel
ports
switch(config)#
Release Modification
5.2(1)N1(1) This command we introduced.
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