Description: 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.