Important Note: Setting static IP is suggested for maintaining synchronization on offline devices.
Open settings using the remote controller.
Go to General.
Open Network settings.
Open the settings for connection type (Wired - Wifi) of your device.
Go to Advanced Settings.
Click on Edit.
Uncheck Set Automatically option.
Change the last field of IP address (192.168.1.xxx) . Every device on the same local network should have unique IP addresses.
Press connect when you are done.
Repeat these steps for every device.