Passive Fault Management

What Does Passive Fault Management Mean?

Passive fault management is a kind of fault management that helps in detecting, isolating and correcting problems in a communication network by gathering alarms from computers or devices when a malfunction happens. Unlike in an active fault management system, it only sends an error report to the management tool and does not send an alarm if a device completely fails.

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A drawback of this method is that it relies solely on the alarms sent by nodes in devices, that is, of course, assuming that they are smart enough to send alarms, or are still capable of doing so when a problem occurs.

Techopedia Explains Passive Fault Management

This kind of fault management system observes the input and output behavior of a device without really making a move to interfere with its operation flow. Its approach is simply to record the flow and behavior of the device being monitored and compare the stored observations with the original specification. There are other approaches, though, and they sometimes include the checking of other relevant properties of the device.

An algorithm based on variables was first used to perform passive testing on Extended Finite State Machines (EFSMs). This kind of Finite State Machines are the main basis on how passive testing works. This algorithm, however, cannot detect every transfer error, though it traces the variable values and the system state.

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Margaret Rouse

Margaret is an award-winning technical writer and teacher known for her ability to explain complex technical subjects to a non-technical business audience. Over the past twenty years, her IT definitions have been published by Que in an encyclopedia of technology terms and cited in articles by the New York Times, Time Magazine, USA Today, ZDNet, PC Magazine, and Discovery Magazine. She joined Techopedia in 2011. Margaret's idea of a fun day is helping IT and business professionals learn to speak each other’s highly specialized languages.