NPAT ATM PNNI Model

PNNI ("Private Network Node Interface" or "Private Network-to-Network Interface") is a scalable protocol that defines both routing and signaling protocols that enables communication and interoperability between ATM switches belonging to different vendors, or between private ATM switches and private ATM switching systems. By organizing the nodes in a network into smaller groups, PNNI simplifies large network topologies and reduces the amount of topological information that must be maintained in the node.

Supported Features

• Create and Modify the PNNI Topology
• Modify Node PNNI properties (e.g. admin weight, leader priority)
• Modify Link PNNI properties (e.g. admin weight, aggregation token)
• Modify Routing Parameters (e.g. AvCR_PM, AvCR_MT, significant cost difference, max number of crankbacks)
• Perform PNNI Capacity Design
• Simulate PNNI routing
• Model Hierarchical PNNI / multiple peer group levels
• Perform PNNI Peer Group Design - from scratch or incremental
• Model Double Partition ("ships in the night") Networks - with both PNNI and ATM running during a migration from one to the other

An H-PNNI network should not be treated the same as a flat network; NPAT models sophisticated H-PNNI routing accurately