Testing NetFlow export configurations

First the NetFlow protocol must be enabled and configured on the router. The router must be given the IP address of the computer running NetFlow tester so that the UDP data packets with NetFlow data are sent to this computer.

• Download the ZIP file below and start
  
  • Netflow5Tester.exe for testing NetFlow version 5
  • NF9Test.exe for testing NetFlow version 9 and IPFIX
• Enter the IP and port number that you have configured as NetFlow packet target in your Cisco Router
• Usually selecting "Any IP" should work, in some cases the IP must be explicitly selected
• Click on "Start"
• You should now see a line in the logfile for each packet the computer receives
• Each line shows the time, NetFlow version, number of flows and the IP of a packet (Note: PRTG Network Monitor supports NetFlow v5, v9, and IPFIX)

• NetFlow5Tester only: Enable "Show Flow Data instead of packet data" to also show the corresponding flow data
• If you do not see any activity then the system does not receive any NetFlow data (e.g. due to misconfiguration of the router or a firewall blocking the packets, etc.)