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You can execute a discovery diagnostic to help determine why a specific device is presenting difficulties in discovery. For example, a given device may be reachable but show an overall status of Failed in the Discovery Status dialog. A discovery diagnostic steps through a complete discovery process based on the configuration on the Probe member to which the device is assigned. The diagnostic runs the gamut from fetching SNMP object ID information to ARP table reading and to ICMP pings and traceroutes.

You can do the following in the Discovery Diagnostics dialog:

  • View all existing discovery diagnostic tasks that were executed in the last 12 hours.
  • Enable or disable SNMP debugging for a device. The SNMP debugging is enabled by default.

Note that you must be a superuser to perform a discovery diagnostic. To execute a discovery diagnostic, complete the following:

  1. From the DataManagement tab, select the IPAM tab, and then click DiscoveryDiagnostics from the Toolbar.
  2. In the Discovery Diagnostic editor, complete the following:
    3. IP
    • Existing Discovery Diagnostic Task: Select this option to choose an existing discovery task from the drop-down list. The appliance displays all the discovery diagnostic tasks that were executed in the last 12 hours in the drop-down list.
    • New Discovery Diagnostic Task: Select this option to initiate a new discovery diagnostic. To start a new discovery diagnostic task, complete the following:
      • IP address: Enter the IPv4 or IPv6 address of the device on which you want to perform the test. The discovery diagnostic runs a full discovery procedure against the specified IP address. Ensure that you select the respective network view in which this IP address resides.
      • NetworkView: If you have multiple network views, select the network view in which the IP address resides from the drop-down list. If you have only one network view, which is the default view, the NetworkView drop-down list is hidden by default. NIOS conducts a discovery diagnostic for the IP address in the selected network view.
      • CommunityString: Specify the community string for the device if the required SNMP credential is not currently configured for the discovery member. It may not be necessary to enter a community string if the device is already discovered by NIOS and is a managed device.
      • ForceTest: To force a diagnostic against the device, select Yes.

    • Enable SNMP debug: As a troubleshooting aid, the SNMP debugging option is enabled by default. When you enable this option, the appliance collects all SNMP communications between NetMRI and a device. The SNMP logs are useful for troubleshooting purposes. Clear this check box to disable the SNMP debugging for a device.

  4. Click Start to start1 start the discovery diagnostic. The lower pane displays the complete discovery sequence for the chosen device, and whether or not the discovery is successful. You can click Stop at any time to end the diagnostic sequence.

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