A table containing a set of VSI controllers. Each controller
represents an instance of the VSI Master control protocol.
A controller communicates with a set of VSI Slaves across
a control interface. Running the VSI protocol, the controller
supports a network control application.
Through VSI, such an application can control the Virtual
Circuit cross-connect table inside the ATM switch,
perform monitoring and statistics collection of interfaces and
virtual circuits on the switch, and discover configuration
information from within the switch.