OpenNMS is a FREE and the first enterprise-grade network management platform developed using the open source model.
The three main functional areas of OpenNMS are service polling, which monitors services on the network and reports on their "service level"; data collection from the remote systems via SNMP in order to measure the performance of the network; and a system for event management and notifications.
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What's New in This Release: [ read full changelog ]
· This first release in the 1.11 unstable series (the future 1.12) adds many bugfixes and minor features, and other architectural work.