3.2 Discovering Network Devices and Links

After you have finished setting up your Network Inventory, you can begin the discovery process. For more information, see Section 3.1, Setting Up a Network Inventory.

Use the Discover view to initiate discovery and review discovery results. To access the Discover view, expand the Network Inventory view tab and click the Discover view tab.

To initiate your Network Inventory, click Activate Discovery. If you scheduled network discovery to start immediately upon activation, Vivinet Assessor immediately begins sending out SNMP queries within the IP network address range you specified. Or, if you decided to start discovery at a specific time of day after activation, Vivinet Assessor notifies the Scheduler to begin discovery at the time you entered in the Set Up view.

Results from discovery scanning appear on the Discover view and are updated in real time:

Field

Description

Summary of latest discover

The current status of discovery.

Status

The current state of discovery scanning. Once discovery is complete, the Status reads, “Discovery complete.”

Start Time

The time discovery scanning became active.

End Time

The time discovery scanning ended.

Number of addresses scanned / # expected

The number of network discovery scans that have been performed, out of the total number of scans scheduled to be performed. The second value is estimated from the number of addresses in the IP network address ranges you entered. If you are performing discovery based on a default gateway router, only the number of scanned addresses is available. For more information, see Section 3.1, Setting Up a Network Inventory.

Number of devices and links found

The number of routers, switches, and links already discovered.

Number of errors

The number of errors that occurred during network discovery scanning.

View Error Log

Enabled if any errors occur during discovery scanning. Click to view information about the errors and get help for avoiding them next time.

Discovered Devices and Links table

Shows any switches, routers, or links that Vivinet Assessor discovers on the subnet you specified in the Set Up view. They are also entered into the database. Link information is derived from the router interfaces discovered. Information about each discovered device or link appears as soon as it is available. Click the Routers, Switches, or Links tab to see the information about each component. For more information, see Section 3.3, Working with Discovered Routers, Switches, and Links.

NOTE:

  • More information is collected than is shown in the Discovered Devices and Links table. All collected information is shown in the assessment reports.

  • Vivinet Assessor discovers all devices on the network; however, some vendors devices are not supported for Network Inventory or for Utilization monitoring. In the table and in reports, unsupported (or unavailable) devices will return no information for some fields.

After you start discovery, the Activate Discovery button changes to a Stop button so that you can stop discovery scanning at any time.