Inventory discovery finds devices as specified by a discovery profile. Run discovery manually, or configure a schedule for the discovery profile.
Inventory discovery is the process of discovering devices as specified by a discovery profile.
DX NetOps Performance Managementonly updates those devices that are in
Activestate during discovery or rediscovery.
For more information about device life cycle states, see Manage Device Life Cycles.
Discovered devices and monitored components can take up to 5 minutes to synchronize with
NetOps Portal. A discovery is considered to be hanging when no new devices are discovered within 10 minutes and the state for the discovery profiles have not changed within 10 minutes. If discovery hangs,
DX NetOps Performance Managementaborts inventory discovery, and then generates an audit event on the data aggregator.
If discovery fails for any of your devices (devices are not found), the state of the discovery profile indicates FAILURE. If discovery finds at least one device, the state indicates PARTIAL_FAILURE.
You can get a list of the unreachable devices using the
discoveryinstancesendpoint for the Data Aggregator REST service.
In this topic:
You can run discovery using the following methods:
Run Discovery Manually
Administrators or a tenant administrators can run discovery manually.
Prerequisite:To run a discovery as the Administrator, you have configured the data collector for the Default Tenant domain.
Follow these steps:
- Hover overAdministration,Data Sources, and then click the data aggregator data source.TheMonitored Devicespage appears.
- ClickDiscovery Profilesfrom theMonitored Inventorymenu.TheDiscovery Profilespage appears.
- Select one or more discovery profiles that are in READY or SCHEDULED state from theDiscovery Profileslist, and then clickRun.TheRun Discovery Profiledialog opens.
DX NetOps Performance Managementadds discovered devices to device collections, which initiates component monitoring and polling. The State of the discovery profile changes to RUNNING.
Run Discovery on a Schedule
You can configure discovery profiles to run on a daily or weekly schedule. When you schedule the discovery profile, the State for the discovery profile is SCHEDULED and the next scheduled run time appears.
Configure the options in the
Scheduletab when you create or edit a discovery profile.
For more information about these options, see Create Discovery Profiles.
View Discovery Profile History Results
The discovery profile results show the devices that were discovered during a specific discovery instance. You can view specific details about these discovered devices, including the IP address, model, type, vendor name, location, and protocols.
You can also automate reviewing (and exporting) discovery profile history by way of the
discoveryinstancesendpoints for the Data Aggregator REST service or use this API in your scripts for managing discovery profiles.
Follow these steps:
- From theDiscovery Profileslist, select the discovery profile for which you want to view discovery results, and then clickHistory.TheDiscovery Historydialog opens.
- Select the discovery history instance for which you want to view results.
- (Optional) Choose the device type to filter.If a single IP address or hostname that was specified in the discovery profile is not found, the device type indicates Inaccessible.DX NetOps Performance Managementdoes not report inaccessible devices from IP ranges.
- (Optional) Filter theDiscovered Devicestable by device type or state.The discovery results appear in theDiscovered Devicestable.TheSNMP Profilecolumn shows the highest ranked SNMP profile to which the device responded.TheStatecolumn indicates one of the following states:
- NewIndicates a device that was discovered for the first time during the discovery run.
- ChangedIndicates that a device type has changed from a previous discovery. For example, a previously discovered pingable device is now discovered as a manageable device. Or a previously manageable device with the device type of Switch has now changed to the device type of Router. Devices with only attribute changes, such as hostname, or system description are not classified as Changed.
- UnchangedIndicates that existing devices have not changed. Existing devices with only attribute changes are also classified as Unchanged. Existing devices that show different IP addresses were discovered and are being monitored with a different IP address. Many devices can respond to multiple IP addresses.DX NetOps Performance Managementmaintains the full set of IP addresses for each device.
- DeletedIndicates that the device has been deleted from the data aggregator since the discovery ran.
- ClickOKto close theDiscovery Historydialog.