Device for establishing communication between local area networks by an exclusive switch and corresponding system for establishing communication as well as a data medium and a computer program

摘要

The method involves introducing category information, to which a portion of a transmitting local area network (LAN) (1) belongs, into a header field (6) of each of packets (4). The category information of the packet is detected during introduction of the packet on a common transport network. An exclusive physical connection is established between the portion of the transmitting LAN and the common transport network based on the category information. Field protection of the category information is assured before the introduction of the packet. Independent claims are also included for the following: (1) a computer system readable information medium comprising computer program instructions for establishing a communication between local area networks (2) a computer program stored on an information medium comprising instructions for establishing a communication between local area networks (3) a system for establishing a communication between portions of local area networks.