Patent ID: 6594227
Filing Date: 2003-07-15
Classification: H04J,H04L

Abstract:
A communication control system comprising:a plurality of network adapters; a network; a plurality of communication stations, each comprising a communication control means, and connected to said network through said plurality of network adapters; wherein said plurality of communication control means communicate with each other according to TCP/IP protocols, and wherein a specific MAC address is assigned to each of said plurality of network adapters, with said plurality of communication control means being aware of only one MAC address for any single remote communication station; said communication control system having a configuration in which only one of said plurality of communication control means is incorporated in each of said plurality of communication stations and said plurality of network adapters are incorporated redundantly in each of said plurality of communication station so that redundant paths are provided through said network between said plurality of communication stations; and furthermore comprising: redundancy control means,disposed between said plurality of network adapters and said plurality of communication control means, for converting a receiver MAC address, included in a transmission request, into an MAC address of a network adapter for communication, when said redundancy control means receives a transmission request from said communication control means, and for converting a sender MAC address, included in a received frame, into an MAC address which said communication control means of a local communication station is aware, when said redundancy control means receives a frame from a network adapter.