Some embodiments provide a non-transitory machine-readable medium that stories a program executable by at least one processing unit of a device. The program classifies several connected devices based on to a history of data transfers among the several connected devices. The program also receives a route request for transmitting a data message from a first device in the several connected devices to a second device in the several connected devices. The program further determines, based on the classification of the several connected devices, a route through the several connected devices that starts at the first device and ends at the second device.