To use Network Insight my understanding is as below
Need to enable IPFIX/Netflow in below components.
1 - For each VDS enable the Neflow & specify the collector IP Address as the Network Insight VM IP
2 - Enable Netflow for all the Distributed port group including port groups of the logical switch.
3 - Enable IPFIX under NSX flow monitoring
Let me know if my above understanding is right or should i need to consider any other points to use Network Insight.