Multiplex communications – Wide area network – Packet switching
Patent
1994-07-29
1995-12-19
Safourek, Benedict V.
Multiplex communications
Wide area network
Packet switching
370 941, H04L 1246
Patent
active
054775477
ABSTRACT:
An inter-LAN bridge equipment is for performing the following operation. That is, a connected to a plurality of LANs. A LANs includes a destination address and source address is extracted from a terminal address. Address information containing the extracted terminal address and corresponding LAN port address is registered in a table memory at a corresponding entry area. When a packet is received from the LAN after address learning, the packet is inputted to a FIFO memory from its start side and held there. The address information is read out of the table memory and comparison is made, by the terminal address comparing circuit, between the terminal address of the address information and a destination address of the received packet. Further, comparison is also made, by a LAN port address comparing circuit, between a LAN port address of the address information and a receive-side LAN port address. A discard operation is performed when a result of comparison by the terminal address comparing circuit shows a coincidence and a result of comparison by the LAN port address comparing circuit show a coincidence. A forward operation is performed when the result of comparison by the terminal address comparing circuit shows a coincidence and the result of comparison by the LAN port address comparing circuit shows a noncoincidence.
REFERENCES:
patent: 5136580 (1992-08-01), Videlock et al.
patent: 5343471 (1994-08-01), Cassagnol
patent: 5371868 (1994-12-01), Koning et al.
Kabushiki Kaisha Toshiba
Safourek Benedict V.
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