The invention discloses a constant degree
interconnection structure, which provides
interconnection structures with nondestructive and continuous extensible capability, simple and feasible
unicast single-path routing methods, and parallel efficient
unicast multi-path routing methods for a great amount of common servers and low-end switches, which are respectively provided with two network adapter ports. The
interconnection of all servers and switches is completed according to the scale of the
data center, the port number of the switches, the layer number of the
data center and other requirements, so as to form the nondestructive continuous extensible interconnection structure; the address of a target
server is identified according to the
data transmission requirement, and a complete path is generated by adopting the
unicast single-path routing method, so as to transmit data to the target
server; and the address of the target
server is identified according to the
data transmission requirement, and a plurality of parallel paths are generated by adopting the unicast multi-path routing method, so as to parallelly transmit data to the target server along the multiple paths.