Creating and Assigning VLANs
In this How To we will cover creating an Access and Voice VLAN and assigning VLANs to a switchport.
We will have to create 4 VLANs on each switch and will assign the VLANs to the correct ports.
Configuration
To create VLANs, we must go into Global Configuration mode on the CLI and then create the VLANs using the syntax below.
SW1#configure terminal # This command puts us in Global Config mode
SW1(config)#vlan 10 # This command puts us into the VLAN sub-configuration mode
SW1(config-vlan)#name SALES # This command sets a name for the VLAN.
SW1(config-vlan)#exit # This command will actually save the VLAN into the VLAN database
The complete configuration to create all four VLANs is shown below.
Now that we have created the VLANs, we will need to assign the VLANs to the correct ports. We assign VLANs from Global Configuration Mode using the syntax below.
SW1(config)#interface ethernet 1/0 # This command puts us into the interface sub-configuration mode
SW1(config-if)#switchport mode access # This command sets this interface to actually be an "access" port for users.
SW1(config-if)#switchport access vlan 30 # This command will actually assign VLAN 30 to this interface
SW1(config-if)#switchport voice vlan 40 # This command will set a VOICE VLAN for the interface
The complete configuration to assign all VLANs is shown below.
Verification
The following show commands will verify that the VLANs are created and are assigned to the correct port.
SW1#show vlan # This command will show the entire VLAN database
SW1#show vlan brief # This command will show only a brief output of the VLAN database
SW1#show running-config interface ethernet 0/0 # This command will show you the configuration for just the specified port
SW1#show interface ethernet 0/0 switchport # This command will show how the hardware of the port is actually configured. Whether it's Layer 2 and what mode the port is configured for.
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