Redundancy and scalability using multiple controller cards
Redundancy
The reliability of such a telecom box also hinges on the controller card, that's a critical component and certainly a potential
SPOF (single point of failure). You can increase the reliability of this telecom box by using additional controller cards.
Scalability
You can also scale your resources to run a particular server application using additional controller cards. For example, if
your controller card (either a SMP or non-SMP board) doesn't have the necessary resources (e.g. CPU cycle, memory), you could
increase the total processor and box resources by using additional controller cards. Qnet transparently distributes the (load
of) application servers across two or more controller cards.