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ALVAO SNMP Network Discovery

This extension module uses SNMP protocol to scan network devices in a computer network, like network printers, routers, switches, etc. It consists of an SNMP Scanner application running on one or more Windows Server machines within your network infrastructure. The application regularly scans the configured IP address space, and for each scanned device it either updates or creates an object in the Objects page.

Technical requirements

  • ALVAO Asset Management
  • Alvao REST API
  • Windows Server
  • SNMP on a .NET Runtime 6 machine (SaaS and on-premise customers)

Installation

  1. Install the AlvaoSnmpScanner.msi application on a Windows Server machine, which is in a local network with the devices you want to regularly scan.
  2. In the appsettings.json file, set:
    1. URL to the Alvao REST API.
    2. Username and password of an application account for basic authentication, or ClientId of the ME-ID application and application credentials. The used user (account) needs to have Asset Management Administrator permission.
    3. IP address ranges (from/to) - the number of IP ranges is unlimited.
    4. Enter all SNMP authentication methods for devices that may appear on the network.
  3. Start the service.
  4. On the Objects page, check the found devices in the Found network devices folder.
    5. Tip:

    You can turn off device pinging in the configuration file. (If PING is not allowed by your firewall, the scanner will not find anything. You need to turn off PING in the service settings.)

Operation

See the map for determining the type of object based on device descriptions.

The SNMP last scan object property contains a timestamp indicating when the SNMP scanner last found the device in the network.

Some property values of the objects created by the scanner are locked and cannot be manually changed. If you want to turn an object to manual tracking unlock its properties by clearing the SNMP scan property value. The scanner will no longer update such objects.

Note:

When scanning printers, you will get toner values (percentages) separated by commas, order of these values is determined by SNMP Object Identifiers (OIDs). While these values typically represent toner status, they may also indicate other factors such as drum wear, transfer kit usage, etc.

 

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