Network topology control method and apparatus

  • US 5,084,870 A
  • Filed: 09/19/1990
  • Issued: 01/28/1992
  • Est. Priority Date: 07/25/1988
  • Status: Expired due to Term
First Claim
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1. A method for controlling the topology of a local area network (LAN) having a plurality of stations, each of the stations being any one of a single attachment station (SAS), a dual attachment station (DAS), a wire concentrator station (WC), a SAS/WC station, or a DAS/WC station, the plurality of stations each being interconnected by duplex point to point physical connections, the method comprising the steps of:

  • exchanging station connection information over the physical connections only between adjacent stations;

    determining, in each of the stations, by analysis of said exchanged connection information, the validity of all connections to each of said adjacent stations according to a predetermined connection list;

    identifying, in each of the stations, valid and invalid connections according to said connection list; and

    performing, in each of the stations, actions relating to the interconnections of the station, based on the results of the identifying step for the station, the actions of all the stations achieving a globally designated primary ring.

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