PRTG Manual: Monitored Devices
UVexplorer manages monitored device data separate from the device information stored in the discovery results. Several of the monitors require detailed information about the device and the relevant device assets in-order to effectively monitor the devices and store the monitored data. For example the SNMP Interface monitor requires information about the devices interfaces in-order to collect and store the interface utilization statistics from the monitored interfaces.
To facilitate configuring and running monitors, UVexplorer stores a snapshot of a discovered device as a monitored device in a data store separate from the discovery results. This creates a device that can be re-used by other monitors as well as storing/tracking collected monitoring data. Storing a snapshot of the device for monitoring purposes separate from the discovery results allows UVexplorer to maintain the historical view of the discovered networks free from changes made by the monitors. It also allows monitors to operate without the risk of losing data based on changes made by subsequent network discoveries.
To view the monitored devices select the 'All Devices' option in the monitor view navigation pane. A list of all devices monitored by UVexplorer is displayed in the main view pane. This list contains monitored devices taken from any discovery result regardless of which discovery result is currently open. Not all devices in this list have to be part of monitor, rather it is a list of any devices that have been taken from a discovery result and added to the collection of monitored devices.
Discovery result devices can be added to the monitored devices when creating device monitors, or when viewing the monitored devices in the main monitors view.
When creating a monitor that monitors devices you must select the devices to monitor. The monitor device picker presents a list of devices currently in the monitored devices along with a list of devices in the currently opened discovery result that are not in the monitored devices. When choosing the devices to monitor, if you select a device from the unmonitored devices it will be added to the monitored devices. NOTE: If you close the monitor device picker and confirm that you are OK adding the unmonitored devices to the monitored devices, the devices will be added to the monitored devices at that point. If you cancel creating the monitor at that time, the devices will have still been added to the monitored devices.
See Monitor Device Picker for more information about adding devices to the monitored devices in this way.
You can also add devices to the monitored devices from the list of monitored devices available in the main view of the monitors page. First, select the 'All Devices' navigation item in the monitor view navigation pane. The list of all monitored devices is displayed. Press the add '+' button in the lower left corner of the monitored device list, or select the 'Add Device...' option in the context menu. The device picker is presented containing any devices in the currently opened discovery result that are not in the monitored devices. Select the devices and hit OK, a snapshot of that device will be added to the monitored devices.
To remove monitored devices select the 'All Devices' navigation item in the monitor view navigation pane. The list of all monitored devices is displayed. Press the delete 'x' button int he lower left corner of the monitored device list, or select the 'Delete devices' option in the context menu. The device picker is presented containing all of the monitored devices. Select the devices you want to delete from the monitored devices and press OK.
NOTE: Deleting a monitored device will remove it from the monitored devices and any monitors it is currently part of. It will also delete ALL monitor history associated with that device.
Managing Monitored Device Credentials
Once discovery result devices are added to the monitored devices, they must be managed separately from the discovery result devices. If the credentials for a monitored device changes the UVexplorer associated credential must be reassigned to the monitored device. To reassign monitored devices credentials, select the 'Assign/Unassign Credentials...' context menu item in the monitored devices list. The protocol credential settings editor will be presented. The devices available to assign or unassign will be the Monitored devices. See Managing Device Credentials for more information on creating and assigning credentials.
If a monitored device has changed significantly and needs to be updated it can be rediscovered (for example: a valid protocol/credential set could have been enabled for a specific device). To rediscover a device select it in the monitored device list and then select the 'Rediscover device...' context menu. The rediscover device dialog will be presented allowing you to specify the credentials and run the device discovery. When the discovery completes press the 'Add' button and the device will be added/updated in the monitored devices list. This will update the device as used by any monitors it is associated with.
See Discovering a single device for more information on rediscovering a device.
Note: If the rediscovery loses important information used by monitors such as interfaces, disks, or processors, those monitors may fail.
