This chapter describe the three primary options for enabling inter-VLAN routing, configure legacy inter-VLAN routing, configure router-on-a-stick inter-VLAN routing, troubleshoot common inter-VLAN configuration issues, troubleshoot common IP addressing issues in an inter-VLAN-routed environment, configure inter-VLAN routing using Layer 3 switching, troubleshoot inter-VLAN routing in a Layer 3-switched environment.