I've checked the switch and it's still sending traffic to our server via 6343.

I've verified the incoming traffic with Microsoft Network Analyzer on the server.

If I disable OpManager, InMon Sflow Trend reports the data.

I've restarted the server multiple times and checked the admin settings in OpManager web console.

Error Message:

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No device is currently exporting NetFlow / sFlow packets to NetFlow Analyzer.

Listening for NetFlow / sFlow Packets at Port 6343 

Click here for instructions to enable NetFlow / sFlow Exports on the router / switch.