Virtual channel setting method and apparatus for data flow

A virtual channel setting method for a data flow, comprising:

• sending, by a sending device, a first data packet of a first data flow to a receiving device, wherein the first data packet comprises an identifier of a first virtual channel corresponding to the first data flow;
• receiving, by the sending device, an acknowledgement packet from the receiving device, wherein the acknowledgement packet comprises an identifier of a second virtual channel, the second virtual channel is a virtual channel in a first virtual channel group corresponding to the first data flow, and the second virtual channel is different from the first virtual channel;
• and
• updating, by the sending device, a virtual channel corresponding to the first data flow to the second virtual channel.

A virtual channel setting apparatus for a data flow, comprising:

• a receiver, configured to receive a first data packet of a first data flow from a sending device, wherein the first data packet comprises an identifier of a first virtual channel corresponding to the first data flow;
• a processor, configured to select a second virtual channel for the first data flow from a first virtual channel group corresponding to the first data flow, wherein the second virtual channel is different from the first virtual channel;
• and
• a transmitter, configured to send an acknowledgement packet to the sending device, wherein the acknowledgement packet comprises an identifier of the second virtual channel.