The same would ordinarily be valid for VLANs inside a solitary switch you would require a different physical association from a port in every VLAN on the switch, to various ports on the switch. Since VLANs are practically equivalent to numerous separate switches each with its own particular subnet, a switch is obliged to course activity between them. In the event that you take the assistance from Cisco IOS utilizing inquiry mark, we can see the number range which we can used to make sub interfaces. We use Sub interfaces for entomb VLAN movement routing by utilizing a Router-on-a-Stick arrangement, NBMA (Non Broadcast Multiple Access) WAN results like casing hand-off or ATM and so on.Ī Sub interface could be arranged much the same as a physical interface. On the off chance that we have one Router with one physical interface, however required to have the switch joined with two IP systems to course activity between two switches, we can make two sub interfaces inside the physical interface, allocate each one sub interface an IP address inside every subnet and afterward course the information between two subnets. Sub interfaces are utilized for a mixed bag of purposes. If we had a switch with just 1 physical interface, yet required to have the switch associated with two IP organizes, so it could do routing, we could make 2 coherent sub interfaces, dole out each one sub interface an IP address inside every subnet, and we can then course between them.Ī sub-interface in a Cisco Router utilizes the guardian physical interface for sending and accepting data. A sub-interface is a sensible interface that uses the "guardian" physical interface for really moving the data. Here are the details of the topics and how they can be configured Ī sub interface is a virtual interface made by isolating one physical interface into numerous consistent interfaces. Doing so, one can become the master of them and can even sort out any kind of problem which might arise during the networking engineering. So to get command on them, one must first learn what they are and how they can be configured. VLAN routing and the SVI interfaces are the terms which we hear every day and they have become so common now. How to Configure inter VLAN routing & SVI interfaces