A method includes receiving at a network device, an identifier from a vehicle routing device. The vehicle routing device is configured to identify packet data flows based on an application running on a vehicle client device. The packet data flows are flowing over a communication link between the vehicle routing device and the vehicle client device. The method includes identifying each packet of each flow according to the application that sends or receives packets related to each of the packet data flows, determining an extended header for the one or more packet data flows based on an Internet protocol version 6 (IPv6) extension header and a RADIUS vendor specific attributes (VSA) structure, and transmitting, by the vehicle routing device, to the network device, the extended header and the one or more packet data flows.