A method for controlling air flow in a server rack includes storing, by a switch, a connection table, the connection table comprising information for rack positions corresponding to switch ports of the switch. The switch obtains address information of at least one management controller corresponding to at least one device connected to the switch ports of the switch. The switch determines a rack position for each of the at least one device, based on the table and the address information. The switch receives from a rack management controller (RMC), a request for the rack position for each of the at least one device. The switch sends to the RMC, the rack position for each of the at least one device. The RMC controls fan speed for the at least one device, based on the rack position for each of the at least one device.