As we know that, VLAN stands Virtual Local Area Network and it is used to divide a LAN into multiple segments. Then what is Inter VLAN Routing, what are its types and its uses? I am going to explain everything in this post.
What is Inter VLAN Routing?
Inter VLAN Routing is the process of forwarding network traffic from one VLAN to another VLAN using a router. As we know that, VLAN trunk allows you to communicate between two or more same VLAN on different switches. Same like this, Inter VLAN routing allows you to communicate between two or more completely different VLAN in the same switch or other with the help of layer device Router.
Types of Inter VLAN Routing:
Inter VLAN can be configured in three different ways:
- Traditional Method
- Router on stick
- Inter VLAN in layer 3 switch
Traditional Method
This is an old method and not in use nowadays. In this method, you need separate physical interfaces for each VLAN. For example, if there is 10 VLAN then your router must have 10 physical ports to configure Inter VLAN. For this reason, it is also cost-effective.
Router on a stick
Router configuration in which a single physical interface routes traffic between multiple VLAN on a network is called router on a stick. This is the latest method and nowadays every network admin using this method. This method allows you to create subinterfaces on the single port of a router. For example, there is 10 VLAN then unlike traditional method you no need 10 physical port on a router. Instead of this, you can add all the VLAN in the single port of a router itself by creating virtual subinterfaces. (eg: f0/0.1, f0/0.2, f0/0.3, etc)
Inter VLAN in layer 3 switch
This method allows you to configure Inter VLAN Routing in the switch itself. But, for this, you need layer 3 switches. You cannot configure Inter VLAN on layer 2 switch.
How to configure Inter VLAN Routing in packet tracer
