We are not able to see the top host and top protocol data in Performance Manager but able to see it in Network Flow Analysis (NFA).
Release : 3.7
Component : IM Reporting / Admin / Configuration
You should see the graphs on the dashboard "Network Interface Performance"
Dashboards
->Infrastructure Health
-->Network Interface Performance
If NetOps Portal is integrated with NFA 10.0+ the Top Enterprise Hosts by Volume view and the Top Enterprise Protocols by Volume view do not work and are hidden when view suppression is enabled.