Network Device Discovery

Network device configuration management starts with the addition of devices to the inventory. Enterprises have hundreds of devices and it would be a laborious task to add devices manually one-by-one and it is even more challenging to list them based on their host name, series, model etc. Network Configuration Manager provides network device discovery option to add SNMP-enabled devices in bulk in a single click. Otherwise, the network devices can be manually added or imported in bulk from a CSV file. Once the devices are discovered, they get listed in the inventory along with device details such as serial numbers, port details, IP addresses, vendors, etc,.

Network device discovery for SNMP enabled devices:

To discover devices which are SNMP enabled, Network Configuration Manager sends a request via SSH / Telnet / SNMP to all the nearby devices. On receiving the request, the devices will send a SysObject ID to the discovery engine of Network Configuration Manager. Now, the discovery engine will try to match the ‌received SysOID with default/custom SysOID. If a match is found, the device will be added and associated with the corresponding device template. If a match is not found, that particular device will not be added.Once the communication is established, the configuration files are transferred to Network Configuration Manager using TFTP. Network device discovery for SNMP enabled devices can be done in three ways:

  • If you want to discover an individual device, you can provide the IP address or the Host name of that particular device.
  • If you want to discover multiple devices from a particular IP range, you can either provide the start IP and the end IP and discover devices which fall within that IP range or import a CSV file.

Network device discovery using manual addition:

To add devices which are not SNMP enabled, you can use the manual addition method and discover network devices to the inventory. You need to provide the Hostname / IP Address, vendor name, device template name and other details to add the device. Once the details are given, that particular network device will be discovered and added in the inventory.

Bulk network device import from a Text/CSV file:

Network Configuration Manager provides an option to import devices from a text file and add them to the inventory. To import devices from a text file, Network Configuration Manager requires that the entries in the file conform to the format given below:

Format : <Hostname or IP Address>,<Device Template Name>,<Series>,<Model>

Using this format, you can automatically discover more than a hundred devices thereby saving time and energy.

Network device discovery-SNMP addition


Network device discovery-manual addition


Network device discovery-import from CSV file


Avoid these common mistakes during network device discovery: 

Settings Error Message Reason
  • The correct SNMP read community
    should be provided.
  • SNMP should be enabled
    in all devices

"‌Device is not responding
to SNMP requests"

‌This error occurs when the device is
reachable but does not respond to the SNMP request.

  • ‌SysOID should be mapped with its respective device template
  • ‌If there is no default device template in Network Configuration Manager
    for the particular device type, add/clone new device template or
    Contact NCM support

"Device is not added"

This error occurs if the device is reachable &
SNMP community is correct, but still the device does not get added.

Discovered devices in the informative inventory 

Once the devices are discovered, they get added to the inventory. In addition to listing the discovered devices with its hardware properties, the inventory also helps you to view, label, edit and upload device configuration from a single, centralized web GUI. The inventory would be a powerful tool at the hands of the administrator allowing him to gather vital information of the devices being managed. Learn more!

Network device discovery-devices


Network device discovery-groups


Network device discovery-config changes