Standalone controller operation provides management for the OpenFlow switches in a network. However, it does not provide high availability (HA), with the result that a controller failure leaves the network in an unmanaged state. Configuring a team of controllers and a corresponding controller region creates a high availability network with failover capability, resulting in a continuously managed network in the event that a controller in the team goes down. Controller teaming also provides centralized controller configuration and monitoring. This chapter describes how to configure a controller team. See “Regional configuration (experimental)” to configure a region for a controller team.