Automatic topology monitor for multi-segment local area network

Details Automatic topology monitor for multi-segment local area network Automatic topology monitor for multi-segment local area network

1991-01-14

1996-08-13

Bowler, Alyssa H.

Excavating

395284, 395839, 371 201, 3642418, 36424294, G06F 1300

Patent

active

055465404

ABSTRACT:
A local area network (LAN) topology monitor including segment monitor nodes which report the presence of new end nodes to a network manager node. The segment monitors send a test-node message when requested by the network manager and inform the network manager of any test-node messages originating from other segments. The network manager uses the sequence of received new-node messages and test-node messages to determine the topology of the LAN. If one segment monitor reports a new node, the new node must be connected to the same segment as the reporting monitor. If multiple segment monitors report the presence of a new node, the network manager requests each reporting segment monitor to send a test-node message. Since the segment monitors report test-node messages received from other segment monitors, if only one segment monitor responds as having received a test-node message, then that segment contains the new node. Otherwise, the new node is off-segment. The presence of one or more bridges connected to particular segment may be similarly determined by having the network manager initiate on-segment test messages.

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