Verification of Initial Data Flow
After configuring the collectors in NFO and the exporters on your network devices, verify that NFO is receiving flow data:
- NFO Status Page: Navigate to the
Status
in the NFO web interface. Look for increasing counters, such astotal input messages
orinput rate, msg/sec
. If these counters remain at zero, it indicates a problem with data flow. - Basic Troubleshooting (Refer to the [Troubleshooting Guide](link to troubleshooting guide) for more detailed steps):
- Connectivity Check: Use ping or traceroute from the flow exporting devices to the NFO server to ensure basic network connectivity.
- Firewall Verification: Re-check firewall rules on both the network and the NFO server to confirm that UDP traffic on the collector port is allowed.
- Exporter Configuration Review: Double-check the destination IP address and port configured on your flow exporting devices.
- NFO Listener Configuration: Verify that NFO is indeed listening on the expected IP address and UDP port (using netstat or similar commands on the NFO server, as shown in the [Troubleshooting Guide](link to troubleshooting guide)).