VLAN Configuration Commands Step by Step Explained
How VLAN works
It allow you to create multiple networks within a single network segment. This means that you can separate traffic from different departments or groups of people without having to move them onto different segments physically. It also makes it easier to manage security because you don’t have to worry about overlapping access points.
The most common way to set up VLAN is by using a router. This device connects to two separate segments of the physical network, and it then creates a new subnet that only allows devices connected to it to communicate with each other.
Switches do not understand broadcast messages. They forward them from all ports. VLAN is a switch feature. It allows us to create a group of devices that share broadcast messages.
We use the vlan command in global configuration mode to create a new VLAN or to update an existing VLAN. We use the switchport mode access vlan command in the interface configuration mode of a port to assign it to a VLAN.
Let's take an example to understand how to use these commands on Cisco switches.
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