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Version: 2.9.1

Troubleshooting Guide


To help identify NetFlow Optimizer (NFO) issues, you can share NFO logs with NetFlow Logic Support.

NetFlow Optimizer software consists of the following components:

  • NFO Server
  • NFO Controller
  • External Data Feeder for NFO (EDFN)

Each component keeps track of its activity by logging to various files.

NFO Server and NFO Controller

These components log their activity in $NFO_HOME/logs (NFO_HOME default is /opt/flowintegrator). You can also see their health on the Status page. This page shows input / output statistics, length of various queues, and drop counts.

The NFO internal log files are rolled based on size. Ten last files are kept in $NFO_HOME/logs/bak directory. You can change the default log rotation size and the number of “bak” files to keep by editing $NFO_HOME/server/etc/server.cfg.

External Data Feeder for NFO logs

EDFN logs its activity in $EDFN_HOME/logs (EDFN_HOME default is /opt/nfi-updater).

You can download logs from NFO by going to Tracing and Configuration on the left navigation bar, and clicking on Download logs button.

The zip file contains both NFO and EDFN logs.

You can securely share the logs with NetFlow Logic Support by opening a support ticket at