Remote interconnection of local area networks
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United States of America Patent
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-
Feb 13, 1990
Grant Date -
N/A
app pub date -
Sep 8, 1988
filing date -
May 5, 1988
priority date (Note) -
Expired
status (Latency Note)
Importance
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 preferably 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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