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Home > Success Center > Netflow Traffic Analyzer (NTA) > NTA 4.2.3 Administrator Guide > NTA Troubleshooting > Enable flow monitoring from unmanageable interfaces

Enable flow monitoring from unmanageable interfaces

When SolarWinds NetFlow Traffic Analyzer receives a data flow from an unmanageable interface, it displays an event in the SolarWinds NTA Events, such as on the following image.


Though this interface does not support SNMP, you can register it to SolarWinds NPM, and enable the NetFlow Receiver Service to process the flow data it exports to SolarWinds NTA. If the interface is not in SolarWinds NPM, SolarWinds NTA drops the data flow.

Add an unmanageable interface

  1. Click Add This Interface in the unmanaged event.
  2. On the Add Interface to NPM menu, edit the Interface Name field if desired.
  3. Define the Interface Speed:
    1. See the documentation of the device for the correct interface speed.
    2. Select the speed type from the list.
  4. Click Submit. The interface is added to SolarWinds NPM and can be viewed on the Node Management page.

Unmanageable interface monitored in SolarWinds NTA

After the unmanageable interface is configured, it looks like any standard interface in SolarWinds NPM, and SolarWinds NTA can recognize the interface. Now SolarWinds NTA can manage the unmanageable interface the same as a manageable interface and does one of the following:

  • If SolarWinds NTA is configured to automatically add NetFlow sources, it adds the source. An event informs you that the source was automatically added to SolarWinds NTA. You can see the source in the NetFlow Sources view.
  • If SolarWinds NTA is not configured to automatically add NetFlow sources, it does not add the source. An event informs you about a flow from an interface not in NetFlow sources. The source is not visible in SolarWinds NTA in the NetFlow Sources view. If you want to monitor this interface, enable monitoring for the interface in SolarWinds NTA. For more information, see NetFlow sources and CBQoS polling.

Unmanageable interfaces do not have information about interface utilization, because SolarWinds NPM does not poll them. SolarWinds NTA cannot show these interfaces in the Top XX NetFlow Sources by % Utilization resource. These interfaces do not trigger NetFlow alerts based on utilization for the same reason.

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