Description: This object identifies the controller managing the partition.

par(1) - Portable Auto Route(PAR). This is a VSI Master controller implementing Cisco Proprietary protocol for network routing and topology in a Network containing only Cisco Switches.

pnni(2) - Private Network-to-Network Interface (PNNI) controller. The PNNI protocol is used between private ATM Switches and between groups of ATM switches. This protocol is defined for distributing topology information between switches and clusters of switches.

tag(3) - Label(tag) Switch Controller(TSC).The LSC Implements MPLS (Multi Protocol Label Switching) protocol. The LSC is a router which is capable of controlling the operation of a separate ATM switch so that the two of them together function as a single ATM-LSR (ATM Label Switch Router). The LSC controls the operation of the ATM Switch using a 'Switch Control Protocol', which allows the LSC to setup and remove cross-connects on the ATM switch, to discover the configuration and capabilities of the controlled switch, and to gather statistics from the controlled switch.