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Method and apparatus for fault detection and isolation in data

  • US 6,173,324 B1
  • Filed: 07/15/1998
  • Issued: 01/09/2001
  • Est. Priority Date: 07/15/1998
  • Status: Expired due to Term
First Claim
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1. A method for detecting and isolating connectivity troubles in a data network that includes links extending between routers that route traffic between at least one data source and at least one data destination in accordance with route destinations stored in the routing tables in the routers as a consequence of one of a Border Gateway Protocol Session and a Open Shortest Path First Adjacency stored in each router, the method comprising the steps of:

  • (a) examining the routing table in each router to detect an erroneous route destination; and

    if so, then generating an alarm indicative of such an error;

    (b) examining each router to detect an erroneous Border Gateway Protocol (BGP) session, and if so, then generating an alarm indicative of such error; and

    (c) examining each router to detect an erroneous Open Shortest Path First (OSPF) adjacency, and if so, then generating an alarm indicative of a such error.

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