What technology does Aruba use to ensure high availability in mobility controllers?

Aruba employs Active/Active clustering to ensure high availability in mobility controllers. This technology enables two or more controllers to work together simultaneously, sharing the load of processing traffic and maintaining session continuity. In an Active/Active configuration, if one controller fails or requires maintenance, the other controllers can continue to operate, thereby minimizing downtime and ensuring uninterrupted service for users.

This setup is particularly crucial in environments demanding high availability and seamless user experiences, such as in enterprises with large, mobile user bases. It allows for efficient resource utilization, as resources can be balanced among different units while providing redundancy. Since both controllers are actively processing and handling traffic, it enhances performance as well as resilience.

Other options like load balancing, fault tolerance, and redundant power supplies provide important contributions to overall system reliability but do not encapsulate the specific mechanism through which Aruba achieves high availability in its mobility controllers as effectively as Active/Active clustering does. Load balancing typically distributes traffic among servers but does not inherently provide session persistence; fault tolerance focuses more on the capability to recover from a failure; and redundant power supplies ensure that devices stay powered but do not directly influence how controllers manage traffic and availability.