This paper reports recent work on gigabit Ethernet interconnection communication traffic analysis. We proposed and demonstrated the system concept of gigabit Ethernet communication. 1.25Gbps, 10Gpbs and 40Gpbs gigabit Ethernet interconnection networks are considered for computer communications. Various switching structures, such as crossbar, double crossbar (Dcrossbar), Modified Dilated Benes (MDB), General MDB (GMDB), Benes, Dilated Benes (Dbenes), Tree architecture, Simplified tree (Stree), Extended baseline network (Ebaseline) are analyzed for searching the optimal performance of gigabit Ethernet communication. The numerical results for computation information transferring can be applied to search a best strategy for gigabit Ethernet communication networks interconnections.