Importance

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Abstract

In a device monitoring system for a communication network, an SNMP monitor acquires state information of devices to be monitored from a group under monitoring, and monitors the states of the devices to be monitored. A command monitor uses a monitor command to acquire the state information of the devices to be monitored. A monitor manager checks monitoring conditions of the devices to be monitored by the SNMP monitor, and sets, if there is a device to be monitored from which state information has failed to obtain, the device as a new target for monitoring and causes the command monitor to transmit a monitor command. The monitoring result is updated by the state information acquired by the command, thereby improving the reliability of failure monitoring.

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First Claim