Would you like to learn how to configure a Trunk on Cisco Switch using the command-line? In this tutorial, we are going to show you all the steps required to create a vlan and configure a trunk on a Cisco Switch 2960 or 3750 using the command-line.

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Tutorial - Trunk on Cisco Switch

First, you need to access the console of your Cisco Switch.

In our example, we are going to use an Opensource software named Putty and a computer running Windows.

The Putty software is available on the putty.org website.

After finishing the download, run the software and wait for the following screen.

Putty windows

To access the console of a Cisco Switch model 2960 or 3750, you will need to select the Serial Connection category and use the following options:

• Connection type: Serial
• Serial line: COM1
• Speed: 9600

If COM1 does not work you will need to try to use COM2, COM3, COM4 or the next.

cisco switch terminal settings

Using either the console, telnet or ssh, connect to the command-line of your switch and log in with a user who has administrative privileges.

On the prompt screen, enter the administrative login information.

After a successful login, the console command-line will be displayed.


Use the enable command to enter the privilege mode.

Switch> enable

Use the configure terminal command to enter the configuration mode.

Switch# configure terminal

Create a new vlan, select an identification number and add a brief description.

Switch(config)# vlan 100
Switch(config-vlan)# name Data Network
Switch(config-vlan)# exit
Switch(config)# vlan 200
Switch(config-vlan)# name Voice Network
Switch(config-vlan)# exit

Access the interface configuration mode.

Set the Switch port as a trunk.

Add the list of authorized Vlans to use this trunk.

Switch(config)# interface gigabitethernet0/40
Switch(config-if)# switchport mode trunk
Switch(config-if)# switchport trunk native vlan 1
Switch(config-if)# switchport trunk allowed vlan add 1,100,200
Switch(config-if)# exit
Switch(config)# exit

In our example, the Switch port 40 was configured as a trunk.

The following Vlans were allowed to use this port as a trunk: 1, 100 and 200.

Vlan 1 is the default native VLAN of Cisco Switches.

Don’t forget to save your Switch trunk configuration

Switch# copy running-config startup-config

You have successfully created a new VLAN.

You have successfully associated a Switch port to a specific VLAN.