3Com 6416SW Installation And User Manual

Network InterfacesATM standards define three protocols used across the interfaces connecting thecomponents of an ATM campus network:UNI Defines the interface between an ATM User Device (such as a terminal,router, bridge, server, workstation, or concentrator equipped with an ATMadapter) and the ATM network. The ATM subsystem supports the privateUNI defined by the ATM Forum UNI Specification V3.1.SSI Defines the interface between two ATM switches in the same ATM Cluster.The SSI fully supports networking functions without the need of operatorintervention, such as routing, node failure and node recovery, backup, andtopology management by the Topology Routing Service (TRS) program.You can define multiple SSI connections between two ATM switches. TheSSI has been developed from the Public-NNI for use in 3Com ATMsubnetworks.NNI Defines the interface between two ATM switches belonging to different ATMClusters in the same subnetwork or in different subnetworks.Operator intervention is required in order to manage networking functionssuch as routing, backup, topology changes, and so on.You can define only one NNI connection between two ATM switches.3-6 ONcore ATM Switch/Control Module: Installation and User's Guide