Learn how to transform a Raspberry Pi into a router with WAN and multiple LAN ports using OpenWrt and a managed switch with VLANs. Follow step-by-step instructions to extend the Pi's Ethernet port, install OpenWrt, configure the switch and Pi, and perform connection tests. Explore security considerations, performance optimization, and the option to add a USB Ethernet adapter. Gain insights on Wi-Fi capabilities and receive practical tips for fine-tuning your setup. This comprehensive tutorial covers everything from hardware selection to advanced configuration, enabling you to create a customized routing solution using readily available components.