Administrator Guide

To tag frames leaving an interface in Layer 2 mode, assign that interface to a port-based VLAN to tag it with that VLAN ID. To tag
interfaces, use the following commands.
1. Access INTERFACE VLAN mode of the VLAN to which you want to assign the interface.
CONFIGURATION mode
interface vlan vlan-id
2. Enable an interface to include the IEEE 802.1Q tag header.
INTERFACE mode
tagged interface
To view just the interfaces that are in Layer 2 mode, use the show interfaces switchport command in EXEC Privilege mode or
EXEC mode.
The following example shows the steps to add a tagged interface (in this case, port channel 1) to VLAN 4. To view the interface’s status.
Interface (po 1) is tagged and in VLAN 2 and 3, use the show vlan command. In a port-based VLAN, use the tagged command to add
the interface to another VLAN. The show vlan command output displays the interface’s (po 1) changed status.
Except for hybrid ports, only a tagged interface can be a member of multiple VLANs. You can assign hybrid ports to two VLANs if the port
is untagged in one VLAN and tagged in all others.
DellEMC#show vlan
Codes: * - Default VLAN, G - GVRP VLANs
NUM Status Q Ports
* 1 Inactive
2 Active T Po1(So 0/0-1)
T Gi 1/1
3 Active T Po1(So 0/0-1)
T Gi 1/2
DellEMC#config
DellEMC(conf)#interface vlan 4
DellEMC(conf-if-vlan)#tagged po 1
DellEMC(conf-if-vlan)#show conf
!
interface Vlan 4
no ip address
tagged Port-channel 1
DellEMC(conf-if-vlan)#end
DellEMC#show vlan
Codes: * - Default VLAN, G - GVRP VLANs
NUM Status Q Ports
* 1 Inactive
2 Active T Po1(So 0/0-1)
T Gi 1/1
3 Active T Po1(So 0/0-1)
T Gi 1/2
4 Active T Po1(So 0/0-1)
When you remove a tagged interface from a VLAN (using the no tagged interface command), it remains tagged only if it is a
tagged interface in another VLAN. If the tagged interface is removed from the only VLAN to which it belongs, the interface is placed in
the Default VLAN as an untagged interface.
Moving Untagged Interfaces
To move untagged interfaces from the Default VLAN to another VLAN, use the following commands.
1. Access INTERFACE VLAN mode of the VLAN to which you want to assign the interface.
CONFIGURATION mode
interface vlan vlan-id
2. Configure an interface as untagged.
INTERFACE mode
Virtual LANs (VLANs)
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