Users Guide

[tagged | untagged]
Creating a Port-Based VLAN
To configure a port-based VLAN, create the VLAN and then add physical interfaces or port channel (LAG) interfaces to the
VLAN.
NOTE: The Default VLAN (VLAN 1) is part of the system startup configuration and does not require configuration.
A VLAN is active only if the VLAN contains interfaces and those interfaces are operationally up. As shown in the following
example, VLAN 1 is inactive because it does not contain any interfaces. The other VLANs contain enabled interfaces and are
active.
NOTE
: In a VLAN, the shutdown command stops Layer 3 (routed) traffic only. Layer 2 traffic continues to pass through the
VLAN. If the VLAN is not a routed VLAN (that is, configured with an IP address), the shutdown command has no affect on
VLAN traffic.
When you delete a VLAN (using the no interface vlan vlan-id command), any interfaces assigned to that VLAN are
assigned to the Default VLAN as untagged interfaces.
To create a port-based VLAN, use the following command.
• Configure a port-based VLAN (if the VLAN-ID is different from the Default VLAN ID) and enter INTERFACE VLAN mode.
CONFIGURATION mode
interface vlan vlan-id
To activate the VLAN, after you create a VLAN, assign interfaces in Layer 2 mode to the VLAN.
Example of Verifying a Port-Based VLAN
To view the configured VLANs, use the show vlan command in EXEC Privilege mode.
Dell#show vlan
Codes: * - Default VLAN, G - GVRP VLANs
NUM Status Q Ports
* 1 Inactive U Te 1/4-11
2 Active U Te 0/1,18
3 Active U Te 0/2,19
4 Active T Te 0/3,20
5 Active U Po 1
6 Active U Te 0/12
U Te 2/0
Dell#
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 Configuring 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 configured, 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.
Virtual LANs (VLANs) 951