Network topology control method and apparatus

Details Network topology control method and apparatus Network topology control method and apparatus

H - Electricity

04

L

344/1

H04L 12/24 (2006.01) H04L 12/42 (2006.01)

Patent

CA 1320256

66822-101 ABSTRACT OF THE DISCLOSURE A method and apparatus for detecting invalid network topologies in a local area network (LAN). The stations comprising the LAN include single attachment stations (SAS), dual attachment stations (DAS), wire concentrators (WC), and DAS/WC combination stations. Adjacent stations exchange connection type information identifying a type of physical connection of the station sending the connection information. A station receiving the connection information determines whether the connection is valid for its physical connection type using a connection matrix. Invalid connections can result in a network topology where stations are physically connected, but are not logically connected, because the stations do not all form a primary ring. Invalid connections may be rejected and bypassed in each station. Alternatively, a station detecting an invalid connection may reconfigure itself using an internal data switch. The actions of each station, taken together, achieve a globally designated primary ring.

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