Run Discovery

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 Management
only updates those devices that are in
Active
state 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 Management
aborts 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
discoveryinstances
endpoint for the Data Aggregator REST service.
For more information about this API, see Manage Discovery Profiles using REST.
In this topic:
Run Discovery
You can run discovery using the following methods:
  • On a schedule
    With this method, you configure a schedule for the discovery profile.
  • Automated.
    With this method, you use the
    discoveryprofiles
    endpoint for the Data Aggregator REST service.
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:
  1. Hover over
    Administration
    ,
    Data Sources
    , and then click the data aggregator data source.
    The
    Monitored Devices
    page appears.
  2. Click
    Discovery Profiles
    from the
    Monitored Inventory
    menu.
    The
    Discovery Profiles
    page appears.
  3. Select one or more discovery profiles that are in READY or SCHEDULED state from the
    Discovery Profiles
    list, and then click
    Run
    .
    The
    Run Discovery Profile
    dialog opens.
  4. Click
    Yes
    .
DX NetOps Performance Management
adds 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
Schedule
tab 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
discoveryprofiles
and
discoveryinstances
endpoints for the Data Aggregator REST service or use this API in your scripts for managing discovery profiles.
For more information about this API, see Manage Discovery Profiles using REST.
Follow these steps:
  1. From the
    Discovery Profiles
    list, select the discovery profile for which you want to view discovery results, and then click
    History
    .
    The
    Discovery History
    dialog opens.
  2. Select the discovery history instance for which you want to view results.
  3. (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 Management
    does not report inaccessible devices from IP ranges.
  4. (Optional) Filter the
    Discovered Devices
    table by device type or state.
    The discovery results appear in the
    Discovered Devices
    table.
    The
    SNMP Profile
    column shows the highest ranked SNMP profile to which the device responded.
    The
    State
    column indicates one of the following states:
    • New
      Indicates a device that was discovered for the first time during the discovery run.
    • Changed
      Indicates 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.
    • Unchanged
      Indicates 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 Management
      maintains the full set of IP addresses for each device.
    • Deleted
      Indicates that the device has been deleted from the data aggregator since the discovery ran.
  5. Click
    OK
    to close the
    Discovery History
    dialog.