VLAN Configuration

VLAN Configuration

VLAN (Virtual LAN) is a logical network that can be created within a physical network to provide isolation and segmentation of network traffic. VLANs allow network administrators to group devices together based on different criteria such as department, location, or function. Switches are used to create VLANs and configure them.

The following are the steps to configure VLANs on a switch:

Create VLANs: Use the vlan command to create VLANs. For example, vlan 10 creates VLAN 10.

Assign ports to VLANs: Use the switchport access vlan command to assign a specific VLAN to an access port. For example, switchport access vlan 10 assigns VLAN 10 to the port.

Configure trunk ports: Use the switchport mode trunk command to configure a port as a trunk port. Trunk ports are used to carry traffic for multiple VLANs. You can also specify which VLANs will be allowed on the trunk using the switchport trunk allowed vlan command.

Configure the native VLAN: The native VLAN is the untagged VLAN traffic that is sent over a trunk port. Use the switchport trunk native vlan command to specify the native VLAN.

Verify VLAN configuration: Use the show vlan command to verify VLAN configuration on the switch. This command displays the VLAN configuration, including VLAN IDs, names, and ports.

Save configuration: Use the copy running-config startup-config command to save the configuration changes made on the switch.

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