ERROR MESSAGE AND SYMPTOMS
" IPV4 Multicast group : java.net.SocketException: no such device "
The NiagaraNetwork will be unable to auto discover any other Niagara AX devices
This error is caused by an invalid gateway setting in the device
FIX THE ERROR
Simply verify the IPv4 Gateway is a valid one on the network you are set to.
There might be an IP, but the Gateway might not be a valid one
Normally, the gateway should always be in the same subnet as the main IP of the controller.