Inter-VLAN routing is not a specific technology or implementation. Explaining Inter-VLAN RoutingД«efore we start the configuration, we may want to pause to completely understand what we are going to do. VLAN IDДЇor each client (PC), the default gateway is the IP address of RoaS in the same VLAN as the client. Use the following tables to understand all the configuration items we are going to work with. In the end, we will take a minute to analyze the routing table and check how the router works for this specific task. Once this is 100% clear, we will move to the configuration part, going very fast on the Layer 2 side we already know about. Configure вЂњRoaSвЂќ Router to do Inter-VLAN Routing for the three VLANs previously createdД«efore we start the configuration, we will present to you the logic of Inter-VLAN routing using a router.Configure access ports and trunks according to the tables below.Create three different VLANs with IDs 10, 20 and 35, named respectively вЂњRedвЂќ, вЂњBlueвЂќ and вЂњGreenвЂќ.To be more specific, hereвЂ™s what we need to do. Consequently, you will need to configure the VLAN part, including trunks, and the Inter-VLAN routing part. However, all network devices are with factory configuration (we just changed the hostname).

We already configured for you all 10 PCs with IP address, subnet mask, and default gateway. If you open the Packet Tracer, youвЂ™ll see we called this device just вЂњRoaSвЂќ. Therefore, all traffic that has to go from a VLAN to another, will flow through this router. In case it wasnвЂ™t clear, the only router in the picture is the one we will use for Inter-VLAN routing.

This is the topology for this lab, the colored squares represent the VLANs.

Router on a stick feature