A flow controller for controlling a data flow through a mobile communication network includes a processor configured to receive a request from a network entity, the request indicating interfaces of the network entity and a data flow destination, and determine at least one interface and a path from a data flow policy of the mobile communication network. The processor is also configured to send a reply to the network entity, the reply indicating at least one of the interfaces of the network entity to be used for the data flow and the path to be used for the data flow.