Remote interconnection of local area networks

Details Remote interconnection of local area networks Remote interconnection of local area networks

H - Electricity

04

J

344/25

H04J 3/26 (2006.01) H04L 12/46 (2006.01)

Patent

CA 1294347

71493-34 ABSTRACT A Local Area Network (LAN) is a digital Communications network interconnecting serial local computer workstations. The invention provides a technique for interconnecting two or more remote LAN's. In a specific embodiment the LAN's are IBM Token Rings in which case the notion of a virtual or pseudo ring is conceived to represent the network between the remote Token Rings. Each Token Ring is connected to the network by a respective half- bridge. Each half-bridge enters a number representing the pseudo ring in the Routing Information field of the frames it forwards over the network to a remote half-bridge. The frames are prefer- ably multiplexed by encapsulating them in a LAPD-compatible frame having a header containing an identifier which identifies the half-bridge for which the frame is destined.

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