I have an existing TPLINK AX11000 router that is setup with the 192.168.10.x network with a bunch of IOT devices in that subnet (static and dynamic addresses). I am able to plug the Tmobile 5G gateway into the WAN port of my existing router and everything works as is. (with Tmobile as the WAN network at 192.168.12.x)
However, all wifi and hardwired connections behind my AX11000 router are at least 50% slower than devices that are connected directly to the Tmobile 5G gateway. Not sure if it is a double NAT latency that caused this.
Is there a way to change the IP on the Tmobile 5G gateway to use 192.168.10.x so I can modify my router to be switch/access point so they are on the same internal network. it will be too cumbersome to change my internal devices to be on the 192.168.12.x and change my internal router to match.