Users Guide

Assigning Interfaces to a VLAN
You can only assign interfaces in Layer 2 mode to a VLAN using the tagged and untagged commands. To place an interface in Layer
2 mode, use the
switchport command.
You can further designate these Layer 2 interfaces as tagged or untagged. For more information, refer to the Interfaces chapter and
Conguring Layer 2 (Data Link) Mode. When you place an interface in Layer 2 mode by the switchport command, the interface is
automatically designated untagged and placed in the Default VLAN.
To view which interfaces are tagged or untagged and to which VLAN they belong, use the show vlan command. The following
example shows that six VLANs are congured, and two interfaces are assigned to VLAN 2. The Q column in the show vlan
command example notes whether the interface is tagged (T) or untagged (U). For more information about this command, refer to
the Layer 2 chapter of the Dell Networking OS Command Reference 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
Add an Interface to Another VLAN
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.
Dell#show vlan
Codes: * - Default VLAN, G - GVRP VLANs
NUM Status Q Ports
* 1 Inactive
2 Active T Po1(So 0/0-1)
T Te 1/1
3 Active T Po1(So 0/0-1)
T Te 1/2
Dell#config
Dell(conf)#interface vlan 4
Dell(conf-if-vlan)#
tagged po 1
Dell(conf-if-vlan)#show conf
!
interface Vlan 4
no ip address
tagged Port-channel 1
Dell(conf-if-vlan)#end
Dell#show vlan
Codes: * - Default VLAN, G - GVRP VLANs
Virtual LANs (VLANs)
871