On the self-similar nature of Ethernet traffic (extended version)
IEEE/ACM Transactions on Networking (TON)
Threshold-Based Mechanisms to Discriminate Transient from Intermittent Faults
IEEE Transactions on Computers
HP Openview: A Manager's Guide
HP Openview: A Manager's Guide
Performance and Fault Management
Performance and Fault Management
An Approach to On-line Predictive Detection
MASCOTS '00 Proceedings of the 8th International Symposium on Modeling, Analysis and Simulation of Computer and Telecommunication Systems
Adaptive Thresholding for Proactive Network Problem Detection
SMW '98 Proceedings of the IEEE Third International Workshop on Systems Management
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Fault management systems detect performance problems and intermittent failures by periodically examining a metric (such as the utilization of a link), and raising an alarm if the value is above a threshold. Such systems can generate numerous alarms. Various schemes have been proposed for reducing the number of alarms, or filtering out the important ones. The time over threshold detection algorithm reduces the volume of alarms at the source detector. This paper describes an experiment that compares time over threshold against simple threshold crossings. The experiment demonstrates that it reduces the number of alarms raised by a factor of 25 to 1 without any significant reduction in the problems detected.