Flow control method and apparatus

A flow control method, wherein the method comprises:

• receiving, by a first device, a first packet sent by a second device, wherein the first packet carries a first field, and the first field carries a first priority;
• receiving, by the first device, a mapping table sent by a controller, wherein the mapping table comprises a correspondence between identification information of a packet and a second priority;
• looking up, by the first device, the mapping table to determine a second priority corresponding to the first packet;
• performing, by the first device, flow control based on the first priority in the first packet;
• and
• performing, by the first device, queue scheduling on the first packet based on the second priority corresponding to the first packet.

A flow control apparatus, wherein the apparatus comprises:

• a transceiver module, configured to receive a first packet sent by a second device, wherein the first packet carries a first field and a second field, the first field carries a first priority, and the second field carries a second priority;
• and
• a processing module, configured to perform flow control based on the first priority in the first packet;
• wherein
• the processing module is further configured to perform queue scheduling on the first packet based on the second priority in the first packet.