Help & troubleshooting for network issues, including connecting your device to your home Wi-Fi network, connecting to public networks, troubleshooting wireless issues & ethernet connections, and optimizing streaming performance.
Some routers have the ability to continue assigning the same address to devices, even without having a reservation. My Actiontec DSL router does, so my devices always have the same address, as if I had manually created a reservation. But it's nothing the Roku is doing. They have no ability to use a static IP, so always requests a new address on boot. So your router is just assigning the same one each time.
Dan Nvidia Shield, Roku Stick (3600), Ultra (4640), Premiere (3920), Insignia 720p Roku TV, Sharp 4K Roku TV, Windows 10 Pro x64 running Serviio and Plex on a wired Gigabit network.