About IP scan / auto-discovery

The Quantellium “IP scan” utility (aka auto-discovery) allows you to examine the network for IP and SNMP devices and map each new device discovered to a default Quantellium class. The resulting set of discovered devices is added automatically to a network map. IP scan uses ICMP pings to find devices and then SNMP requests to interrogate the devices to find out to what class of devices they belong.

Things you should know before you start using IP scan..

No support at all is bad, only support for ICMP is limited, support for both protocols is best!
  • For best results, configure and enable ICMP (ping) and SNMP on as many devices in your network as possible. Devices that do not respond to at least one of these protocols can not be discovered or monitored! Note that, no support for at least one of the protocols is bad, only support for ICMP is limited, support for both protocols is best!
  • Use a custom read-only community name and preferably enable SNMPv2 (if supported) when configuring your devices (FCMS does support SNMPv3, however it is not yet supported in IP scan!).
  • Scanning can take a lot of time. Tests have shown an average of 30.000 addresses/hour depending on the number of different community names and the number of devices in your network. IP scan supports a maximum range size of 65536 addresses (class B network). To reduce scanning time, it is recommended to use the smallest IP ranges as possible covering your network!
  • An IP scan is run in the context of a individual map. After a successful scan, the resulting set of found devices is automatically mapped to FCMS classes and added to that map. Performance-wise, it is not a good idea to have more than 500 objects on a single map. If possible, it’s better to split up your network diagram into a layered map structure with multiple interconnected maps (a single map per IP subnet/floor/building etc) and perform a scan on all maps consecutively.

Performing a scan

  1. Open a browser session to your Quantellium host and log on as Administrator.
  2. Open the map (or create a new one if it not yet exists) for which you are going to perform an IP scan.
  3. Click the yellow lock icon locked in the top right corner of the content box to unlock the map and enable drawing.
  4. Right-click somewhere on the map’s canvas and select Add | IP scan. The “Scan IP range” window opens.

    Fig 1

    A map’s right-click context menu.

  5. Enter the Start- and Stop IP addresses into the appropriate input fields (#addresses <= 65536).
  6. Add one or more community name(s) in the community input field, separated by a comma in descending order of use (most used first), to speed up scan performance.

    Fig 2

    The “Scan IP range” configuration window.

  7. Click the [Submit] button and and see the scan progressing every 10 seconds. IP scan uses a separate application FC_RTScan.exe that runs in background under a system account. A running scan can only be cancelled or killed with the Windows Task Manager. In this case, open the Windows Task Manager application, select the Processes tab, click the [Show processes from all users] button, select FC_RTScan.exe and click on the [End process] button.
  8. At the end of a scan, all discovered devices are mapped to FCMS default classes and added to the map. Discovered issues are listed in a message box.
Scan-issue

Two discovered devices could not be added!