Comprehensive and Detailed Explanation From Exact Extract:
The most common cause of mismatch between bandwidth (SNMP) numbers and flow (NetFlow, sFlow, etc.) numbers is that not all network traffic is included in the flow export. SNMP bandwidth counters include all traffic traversing the interface, but NetFlow or other flow records may only represent sampled or filtered subsets, or may miss certain traffic due to export or device configuration limitations. This is a well- documented and expected difference in the SolarWinds platform.
Reference:
Network Performance Monitor Administrator Guide, "Understanding Bandwidth and Flow Discrepancies,"
"Flow data

Comprehensive and Detailed Explanation From Exact Extract:
The correct process for creating a poller in Device Studio is:
Select the technology
Specify the data source
Assign the poller to a node
Save the poller
Reference:
"To create a poller in Device Studio: select the technology, specify the data source (OIDs), assign to nodes, and save."
- (Network Performance Monitor Administrator Guide, Device Studio section)

Comprehensive and Detailed Explanation From Exact Extract:
According to the SolarWinds documentation:
"The maximum number of resources that can be displayed in any flow chart or view is 50. Attempting to display more may impact performance and will not be rendered in the UI." This ensures optimal performance and usability of the charts within the platform.
References:
Network Performance Monitor Administrator Guide, "Charts and Views Limits" SolarWinds Success Center: "Flow Chart Resource Limits"

Comprehensive and Detailed Explanation From Exact Extract:
To properly collect and display NetFlow data in SolarWinds NTA, the following requirements must be met:
C). Each device that exports NetFlow data to SolarWinds' NTA must be monitored in NPM.
NTA (NetFlow Traffic Analyzer) relies on devices being monitored by NPM (Network Performance Monitor) to collect and correlate flow data.
D). The interface through which a device exports NetFlow data must be monitored in NPM.
Only interfaces that are managed in NPM can be used for NetFlow data collection, visualization, and reporting.
Devices do not need to be monitored in NCM (Network Configuration Manager) for NetFlow, and exporting NetFlow is not optional if you want the device's flows displayed in NTA.
References:
NTA Administrator Guide: Requirements for NetFlow Monitoring