Abstract: Based on the hierarchical network architecture, we propose an improved dynamic monitoring algorithm for reducing
the management overhead. By analyzing the probability of the alarm occurrece with the sampled network information, the
proposed algorithm prolongs the interval between two consecutive pollings when no alarm could occur. This method
significantly reduces the amount of monitoring traffic and guarantee to detect the abnormal event. The simulation results
show that the proposed monitoring scheme reduces both the number of pollings and the cost of the network management, and
consequently improves the network performance.

Key words: network monitoring, fault management, polling, trap