Inter-VLAN routing

Inter-VLAN routing


In the previous chapters, we learned how VLANs segment broadcast traffic on a switch and segment a switched network into different LANs. We also learned to avoid layer 2 loops by using the STP protocol. ,

As a network administrator, you must create and assign different users to the VLANs in your network, with three main departments being logically segmented using VLANs, VLANs - FINANCE, VLANs - SALES, and VLANs. 30 - HR.

The use of VLANs means that users would not be able to communicate between services; H. That a FINANCE user can not send a message to a user in SALES because they are in different broadcast domains.

In many companies you will find that sharing information between services is a necessity. The question then arises of how to communicate with the users of the Sales and Finance department, but with different VLANs.

In this chapter we discuss the role that inter-VLAN routing plays in communication between different VLANs. We'll learn how it works, look at the different ways it can be implemented, configure inter-VLAN routing using a router and traditional inter-VLAN routing, compare the two implementation styles, and then check and fix that Inter-VLAN routing.

Introduction to Inter-VLAN Routing

When we learned about the existence of VLANs, we said that each VLAN is normally located on its own subnet, that the switches mainly operate on layer 2 of the OSI model and therefore do not examine logical addresses. Therefore, user nodes in different VLANs can not communicate by default. In many cases, we may need to connect users in different VLANs. This can be achieved by inter-VLAN routing.

In this course we'll look at a kind of inter-VLAN routing that uses a router.


Inter-VLAN routing can be defined as a way to transfer traffic between different VLANs by implementing a router on the network. As we have already learned, VLANs logically segment the switch into different subnets. When a router is connected to the switch, an administrator can configure the router to transfer traffic between the different VLANs configured on the switch. The VLAN user nodes transmit traffic to the router, which routes the traffic to the destination network, regardless of the VLAN configured on the switch.

You can Check out Video :

You can Download Project File Pkt From here for version 7.1

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