Are you looking at the steps of Orbi setup with existing router? So, you can read this blog,
Connect the LAN port of your old router or gateway to the Internet port of your Orbi router
using an Ethernet wire. Using a computer or mobile device linked to your Orbi network,
launch a web browser. Orbilogin.com is a website where you can log in. If you have a
problem while doing Orbi setup with existing router, visit our site.