Service Manual

Configuration Task List
This section contains the following VLAN configuration tasks.
• Creating a Port-Based VLAN (mandatory)
• Assigning Interfaces to a VLAN (optional)
• Assigning an IP Address to a VLAN (optional)
• Enabling Null VLAN as the Default VLAN
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 So 9/4-11
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
Virtual LANs (VLANs) 1118