Fault Management in Network Management

Filed under , , on Monday, May 09, 2016

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Fault Management
          The facilities that enable the detection, isolation, and correction of abnormal operation of the OSI environment
          What is “a fault”?
          An abnormal condition that requires management attention (or action) to repair
          Indicated by failure to operate correctly or by excessive errors
          Communication line is cut
          A crimp in the cable
          Certain errors may occur occasionally and are not normally considered to be faults

          When a fault occurs
          Determine “exactly” where the fault is
          Isolate the rest of the network from the failure
          Reconfigure or modify the network to minimize the impact of operation
          Repair or replace the failed components

 


User requirements for Fault Management

          Fast and reliable problem resolution
          Receive notification and correct the problem immediately
          Requires rapid and reliable fault detection and diagnostic management
          Provides fault tolerance
          Redundant components and alternate communication routes
          Fault management capability itself should be redundant
          Keep informed of the network status
          Reassurance of correct network operation through mechanisms that use tests or analyze dumps, logs, alerts, or statistics
          Problem tracking and control
          Ensure the problem is truly resolved and no new problems are introduced
          Fault management should have minimal effect on network performance


Issues of Fault Management
  • Alarm Correlation
  • Trouble Ticketing System
  • Expert System Application

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