I have an EB810v connected to the internet via an external 10Gbit FTTH ONT connected to the WAN port I have a 4G-SIM Ethernet Lan Router connected to a LAN port of the EB810v that I would like to use

Hello, i have an EB810V with latest firmware connected to 10g internet where i want create a new Mesh Wifi with 2 new DECO50-POE connected each via Eth-poe to share same SSID. All 3 unit must have sam