Method and device for data transfer over a plurality of links

A device for data transfer over a plurality of links, the device comprising:

• one or more processors;
• and
• a memory;
• wherein the memory has computer readable program codes stored therein, and the one or more processors are configured to execute the computer readable program codes to perform:
• selecting at least one virtual link over which a data packet needs to be transmitted, from a plurality of virtual links;
• determining a physical link corresponding to the selected virtual link according to a binding relationship between the virtual link and the physical link;
• and
• transmitting the data packet to a receiving device over the determined physical link;
• wherein the data packet comprises an Internet Protocol (IP) address corresponding to the virtual link, and the plurality of virtual links correspond to the same IP address;
• and
• if handshake authentication needs to be performed on the receiving device, then performing the handshake authentication on the receiving device, and notifying the receiving device after the handshake authentication is successful and it is determined that a virtual link can be set up for a physical link corresponding to an IP address notified by the receiving device;
• and
• receiving an updated binding relationship between the virtual link and the physical link, from the receiving device.