Performing an initial discovery run

This section provides guidelines for an initial snapshot discovery without credentials. This produces a list of potential hosts that can be discovered.

The following topics are covered in this section:

Before you begin

Ensure you have the list of IP addresses in your network to scan, as well as IP addresses that should not be scanned and discovered for any reason.

To start discovery

  1. Log in into BMC Discovery as the discovery user.
  2. Click Manage > Discovery in the menu bar. 
    The Discovery status page is displayed.
  3. On the discovery page, click Add New Run
  4. Ensure that the Snapshot is selected. 
  5. Select IP Address. You can also perform a cloud scan here by selecting the Cloud option, though you must have configured cloud credentials and enabled cloud discovery.
  6. Enter the IP address information in one of the following formats:
    • IPv4 address (for example 192.168.1.100). Labelled v4.
    • IPv6 address (for example 2001:500:100:1187:203:baff:fe44:91a0). Labelled v6.
    • IPv4 range (for example 192.168.1.100-105192.168.1.100/24, or 192.168.1.*). Labelled v4.

    Note

    Scanning the following address types is not supported:
    • IPv6 link local addresses (prefix fe80::/64)
    • IPv6 multicast addresses (prefix ff00::/8)
    • IPv6 network prefix (for example fda8:7554:2721:a8b3::/64)
    • IPv4 multicast addresses (224.0.0.0 to 239.255.255.255)

    • As you enter text, the UI divides it into pills, discrete editable units, when you enter a space or a comma. According to the text entered, the pill is formatted to represent one of the previous types or presented as invalid.

    • Invalid pills are labeled with a question mark. You can also paste a list of IP addresses or ranges into this field. If any pills are invalid, a message stating the number of invalid pills is displayed above the range field. Clicking the link applies a filter which shows only invalid pills which you can then edit or delete. The filter can be removed by clicking clear in the Showing n of n label below the Range field. There is no paste option on the context sensitive (right click) menu.

    • Warning: You cannot paste a comma-separated list of IP address information into the Range field in Firefox. This can crash the browser. You can use a space separated list without any problems.
      • To edit a pill, click the pill body and edit the text.
      • To delete a pill, click the X icon to the right of the pill, or click to edit and delete all of the text.
      • To view the unformatted source text, click the source toggle switch. The source view is useful for copying to a text editor or spreadsheet. Click the source toggle switch again to see the formatted pill view.

    • Underneath the entry field is a filter box. Enter text in the filter box to only show matching pills.

    • Pills are not currently supported in Opera.

  7. Select Sweep Scan level for the discovery run. In sweep scan mode, the discovery is trying to determine what is at each endpoint in the scan range.
  8. Enter a label for the discovery run. Where the discovery run is referred to in the UI, it is this label that is shown.
  9. For multitenant deployments, select the company name to assign to the discovery run. This drop-down list is only displayed if multitenancy has been set up. If (No company) is displayed, or a company name that you were expecting is missing, refresh the list by clicking Lookup Companies on the CMDB Sync. See multitenancy for more information about this feature.
  10. Click OK.
    The Currently Processing Runs tab is displayed with the new discovery run.
  11. If discovery is running, the scan will start immediately.
    If the scans are stopped and you see the Discovery is Stopped message, you can enable discovery by clicking START ALL SCANS.
    The screen is automatically refreshed to show the status of the discovery process. When the scan is complete, you can find the discovery scan details and results on the Recent Runs tab. 

Next steps

See Examining scan results.

Related topics

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