AVI Controller, on NSX advanced load balancer

The Avi Controller provides a centrally managed control, analytics and operational dashboard that provides control and visibility into application performance. For the Avi Vantage platform, that Avi Controller performs all administrative functions as well as all analytics data gathering and processing. In a 3-node Avi Controller cluster, one node is the primary (leader) node and performs the administrative functions. The other two nodes are followers (secondaries), and perform data collection for analytics, in addition to standing by as backups for the leader.