In this lab, you will create VLANs on both switches in the topology, assign VLANs to switch access ports, verify that VLANs are working as expected, create VLAN trunks between the two switches and between S1 and R1, and configure Inter-VLAN routing on. In this lab, you will create VLANs on both switches in the topology, assign VLANs to switch access ports, verify that VLANs are working as expected, create VLAN trunks between the two switches and between S1 and R1, and configure Inter-VLAN routing on. InterVLAN routing means routing packets between VLAN. When we want to send packets from one VLAN to another, we need routing. Without routing, VLANs are isolated networks that can't communicate with each other. Routers or multilayer switches (Layer three switches) both allow us to route packets. In this lesson, we will learn to configure a multilayer switch (also called Layer 3 switch) to perform inter-VLAN routing, which was previously done using an actual router. That intern's DHCP request just hit the CEO's private printer. VLAN is the logical grouping of devices in the same or different broadcast domains. Cisco NX-OS (Nexus Operating System) is the software which is powering this new generation of switches and has many similarities (regarding command structure etc) with the traditional IOS software which has been in production for decades.