ManageEngine OpManager

OpManager monitors routers, switches, firewalls, wireless devices, servers, virtual machines, storage systems, printers, and other IP-connected infrastructure. It supports physical and virtual servers across platforms such as Windows, Linux, VMware, and Hyper-V. [ManageEngine OpManager features](https://www.manageengine.com/network-monitoring/opmanager-features.html)

OpManager uses protocols and methods including SNMP, WMI, CLI, and ICMP, depending on the device and metric. Its server-monitoring documentation lists SNMP versions 1, 2c, and 3 alongside WMI, CLI, and APIs. [OpManager server monitoring](https://www.manageengine.com/network-monitoring/server-monitoring.html)

ManageEngine says the enterprise monitoring edition can scale beyond 10,000 devices or 50,000 interfaces. Actual capacity depends on deployment design, polling load, and the edition and licensing used. [ManageEngine OpManager features](https://www.manageengine.com/network-monitoring/opmanager-features.html)

It tracks metrics such as CPU, memory, disk use, packet loss, latency, and response time, then sends threshold-based alerts through channels such as email, SMS, Slack, and webhooks. It also provides network maps, syslog monitoring, and SNMP trap processing for troubleshooting. [ManageEngine OpManager](https://www.manageengine.com/network-monitoring/network-monitor.html)