I’m by no mean a network expert. This is just my personal experience when I setup my USG to my existing network. In my case, I was using Orbi RBK as my router and access point. With USG in place, I will use the Orbi in access point mode. The USG will be replacing the Orbi as my router. My current network is using 10.0.0.1/8 IP range. By default, USG uses 192.