Network layerEdit online The network layer consists of network discovery and polling tools. About discoveryAs a network administrator, you configure and run full and partial discoveries to generate a network topology. About EMS-based discoveryNetwork Manager can be configured to collect topology data from Element Management Systems (EMSs) and integrate this data into the discovered topology.About pollingNetwork polling determines whether a network device is up or down, whether it has exceeded key performance parameters, and identifies inter-device link faults. If a poll fails, Network Manager generates a device alert, which operators can view in the Event Viewer.Parent topic: About Network Manager