Method for implementing multi-path communications between host computers with single network interfaces

The invention provides a method for implementing multi-path communications between host computers with single network interfaces, which is used for implementing the multi-path communications between a first host computer with the single network interface and a second host computer with the single network interface on a communication network. The communication network is based on a network protocol supporting the multi-path communications between multihomed host computers. The method comprises that: the first host computer transmits a network message for establishing a connection to the secondhost computer, wherein an IP address parameter domain of the network message comprises IP addresses of a virtual network interface and a real network interface of the first host computer; a transfer node processes the network message according to a forwarding policy; the second host computer receives and records the network message, and returns a response message through the same path, wherein the IP address parameter domain of the response message comprises the IP addresses of the virtual network interface and the real network interface of the second host computer; and the first host computer receives and records the response message, and then transmits other messages required by establishing the connection to the second host computer again according to the network protocol until the connection between the two host computers is established.