You can control the discovery process as follows:

• You can schedule a scan to occur at any time.
• You can run an immediate snapshot scan of a specified address range. This can be run whether or not the regular discovery scan is in progress: the specified addresses are scanned automatically as soon as possible.
• You can specify the IP range that is scanned during the normal discovery run.
• You can delete a selected range, or ranges, or all IP addresses from the regular scan and the snapshot scan lists.
• You can stop and restart the discovery process at any time.

For general information on how the discovery process works, see The Discovery Engine.

Scheduled Discovery Run

To add a scheduled discovery run, from the Discovery Status page, click the Add New Run ... link.

In order to start the Discovery process, you must click the START ALL SCANS button on the Discovery Status page, as by default Discovery is off.

You can schedule a discovery run to occur daily, weekly, or monthly and can specify a start time and duration. To schedule a scan:

1. Click the Add New Run ... link. The Add a New Run dialog is displayed.

   On a consolidation appliance the link name is Add New Local Run ...

2. Select the Scheduled radio button. The dialog is refreshed to show Frequency, Start Time, and Duration drop-down lists.
3. Enter the information for the scheduled scan in the fields.
   

   Field Name	Details
   Range	Enter either a single IP address or a range in one of the following formats: • IP addresses, as a single address or a range, or a comma separated list, for example, 172.17.1.1 or 172.17.1.1-5 or 172.17.1.1, 172.17.1.2, 172.17.1.3 • A subnet, for example 172.17.1.0/24 • A * wildcard, for example 172.17.1.*
   Level	Select the level for the discovery run. This is one of: • Sweep Scan - This will do a sweep scan, simply asserting that there is an IP device at the end of this endpoint. • Host Identification - Enough to get to the point we can build a host and its interfaces. Usually this will involve getting the hostinfo and the interfaces for the endpoint. • Host Information - Retrieve all the default informaton for hosts, but do not do any inference. • Full Discovery - Retrieve all the default info for hosts, and complete full inference.
   Label	Enter a label for the discovery run. Where the discovery run is referred to in the UI, it is this label that is shown.
   Frequency	Select a frequency for the discovery run to be performed. For example, this can be Daily, Weekly, or Monthly. For a weekly discovery run, you are provided with buttons for each day. Select the day or days that you want the run to take place. For a monthly discovery run, you are provided with buttons for each day in the month. Select the day or days that you want the run to take place. Alternatively, select the Scan on the radio button and choose one of: • First • Second • Third • Fourth • Last and the day that you want the scan to take place. In this way you can select the Second Tuesday of the month and so forth.
   Start Time	Select a time for the scan to start. Discovery will need to be running at this time.
   Duration	Select a duration in hours. This is the length of the scan window and can be from 1 to 23 hours.

4. Click OK. The Scheduled Runs tab is displayed with the new run.

To add another scan to this page, click the Add New Run ... link. To delete any existing scheduled scans, select the entry and click the Delete button.

Editing an Existing Scheduled Run

You can edit an existing scheduled run. If the run is currently in progress it is automatically cancelled when you edit it. To do this, from the Scheduled Runs tab of the Discovery Status page:

1. Click on the Scheduled Run that you want to edit.
2. The Edit an Existing Run dialog is displayed:
   
   
3. All of the fields described in the table above are editable. Make the required changes and click OK to apply the changes and dismiss the dialog.

Scanning IP Addresses or Ranges Immediately

To add a snapshot discovery run, from the Discovery Status page, click the Add New Run ... link.

In order to start the Discovery process, you must click the START ALL SCANS button on the Discovery Status page, as by default Discovery is off.

1. Click the Add New Run ... link. The Add a New Run dialog is displayed.
2. Enter the information for the snapshot discovery run in the fields.
   

   Field Name	Details
   Range	Enter either a single IP address or a range in one of the following formats: • IP addresses, as a single address or a range, or a comma separated list, for example, 172.17.1.1 or 172.17.1.1-5 or 172.17.1.1, 172.17.1.2, 172.17.1.3 • A subnet, for example 172.17.1.0/24 • A * wildcard, for example 172.17.1.*
   Level	Select the level for the discovery run. This is one of: • Sweep Scan - This will do a sweep scan, simply asserting that there is an IP device at the end of this endpoint. • Host Identification - Enough to get to the point we can build a host and its interfaces. Usually this will involve getting the hostinfo and the interfaces for the endpoint. • Host Information - Retrieve all the default information for hosts, but do not do any inference. • Full Discovery - Retrieve all the default info for hosts, and complete full inference.
   Label	Enter a label for the discovery run. Where the discovery run is referred to in the UI, it is this label that is shown.

3. Click the OK button. The Currently Processing Runs tab is displayed with the new run.

Excluding IP Addresses and Ranges from Scanning

There may be some IP devices in your network that you never want to be scanned. For example you may have some legacy applications which will only run on old hardware which may be regarded as "fragile". You can add this device as a single IP exclude, or as an Exclude Range.

To add an Exclude Range, from the Exclude Ranges tab on the Discovery Status page, click the Add New Exclude... link. The Add a New Exclude Range dialog is displayed:

1. Enter the information for the exclude range in the fields.
   

   Field Name	Details
   Range	Enter either a single IP address or a range in one of the following formats: • IP addresses, as a single address or a range, or a comma separated list, for example, 172.17.1.1 or 172.17.1.1-5 or 172.17.1.1, 172.17.1.2, 172.17.1.3 • A subnet, for example 172.17.1.0/24 • A * wildcard, for example 172.17.1.*
   Label	Enter a label for the discovery run. Where the discovery run is referred to in the UI, it is this label that is shown.
   Description	A free text description of the exclude range.

2. Click the OK button. The Excluded Ranges tab is displayed with the new exclusion.

Editing an Existing Exclude Range

You can edit an existing exclude range. To do this, from the Exclude Ranges tab of the Discovery Status page:

1. Click on the exclude range that you want to edit.
2. The Edit an Existing Exclude Range dialog is displayed:
   
   
3. All of the fields described in the table above are editable. Make the required changes and click OK to apply the changes and dismiss the dialog.

Starting the Discovery Process

The status of the discovery process is shown at the top of the page. You can click START ALL SCANS to start the scan, any scans that are on hold or waiting to start will transition into "In progress". If a run is on hold but outside its scheduled window it will not start.

1. Click the START ALL SCANS button. The screen is automatically refreshed to show the progress of the discovery process.

Stopping the Discovery Process

The status of the discovery process is shown at the top of the page. If a scan is in progress, that is "Discovery is running", you can click STOP ALL SCANS to stop the scan. Any regular scans and snapshot scans currently in progress will stop. The status changes to "Discovery is stopping" while the process closes.

1. Click the STOP ALL SCANS button.
2. No more scans will be started and discovery will attempt to stop all in progress commands.
3. Once the scan has stopped, no more scans will be performed until you restart the scan. Click START ALL SCANS to restart the discovery process.