This guide provides a step-by-step walkthrough on how to configure VLAN on Cisco switch, covering VLAN creation, assigning ports to VLAN Cisco switches, configuring trunk ports, best practices, and VLAN troubleshooting Cisco switch methods. A Virtual Local Area Network (VLAN) is a logical grouping that segments a network into smaller broadcast domains. VLANs allow you to separate network devices into distinct groups, even if those devices connect to the same physical switch or to different switches. Every command and every screen of output below was captured on two Cisco. Three PCs have an IP configuration from the network 10. Configure two VLANs: VLAN-10 and VLAN-20. In a real network, you also need to assign access ports, configure trunk links, verify forwarding behavior, and avoid common mistakes such as native VLAN mismatches, overwritten trunk VLAN lists, or inactive SVIs.
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