The article is aimed at explaining the setup of the High Availability (HA) functionality on the Controller. HA is a system or component that is continuously operational for a desirably long length of time. Edgecore's HA mechanism uses redundancy to achieve high availability with minimum impact during service transition. HA 1+1 can be configured to provide redundancy for one Controller. Once the HA links have been established, all system configurations, user databases, user online status, system resource status, managed AP profile are synchronized between the Active AC and the Standby AC. Furthermore, the Standby AC uses a HA link monitoring module to check the status of the Active ACs. During an event that an Active AC is not responding via the HA interface, this module will regard this AC as no longer providing service and take over network service. Please click here to know more.