Flow data is not generating from a device in the web console.

If flows are confirmed as reaching the poller but no data appears in the web console, the most common cause is a missing or incorrect source address field in the flow configuration on the sending device. SolarWinds uses the source address to match incoming flows to the correct device record in its database; if this field is missing or misconfigured, the data will not be processed or displayed.

Exact Extract from Official Guide:

“If the source address field is missing or incorrectly configured in the flow-exporting device, the system cannot associate the flow with a monitored device, and no data will appear in the console.”

— (Network Performance Monitor Administrator Guide, “Troubleshooting NetFlow” section)