A communication method includes: determining, based on first indication information and second indication information, a transmit end and a receive end that communicate with each other by using a data flow, to indicate that a first device is the transmit end and the second indication information is used to indicate that a second device is the receive end, or to indicate that the first device is the receive end and the second indication information is used to indicate that the second device is the transmit end; obtaining, bandwidth information of the data flow; and sending, data flow information and the bandwidth information to indicate at least one of a port identifier of the transmit end and a port identifier of the receive end, and the port identifier of the transmit end, the port identifier of the receive end, and the bandwidth information are used to create the data flow.