Reasons not to export both ingress and egress NetFlow traffic data
Flows carrying NetFlow traffic data enter a device through an ingress interface and leave the device through an egress interface. For more information, see Monitor Traffic Flow Directions.
If you export both ingress and egress data for all interfaces, you will get the same data twice: once as ingress data entering the device, and once as egress data as the flow leaves the device.
If you configure exporting ingress data on some interfaces and exporting egress data on other interfaces, the data shown by NTA may be inconsistent.
SolarWinds recommends that you configure exporting either ingress or egress data to prevent NTA from showing misleading traffic data.