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Network Interfaces
ATM standards define three protocols used across the interfaces between ATM campus network
components:
UNI
Defines the interface between an ATM user device (such as a terminal, router, bridge,
server, workstation, or concentrator equipped with an ATM adapter) and the ATM network.
The ATM subsystem supports the private UNI 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 operator intervention, such
as routing, node failure and node recovery, backup, and topology management by the
Topology Routing Service (TRS) program.
You can define multiple SSI connections between two ATM switches. The SSI has been
developed from the Public-NNI for use in IBM ATM subnetworks.
NNI
Defines the interface between two ATM switches belonging to different ATM Clusters in the
same subnetwork or in different subnetworks.
Operator intervention is required in order to manage networking functions such as routing,
backup, topology changes, and so on.
You can define only one NNI connection between two ATM switches.
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IBM 8285 Nways ATM Workgroup Switch:
Installation and User’s Guide
Summary of Contents for 8285 Nways
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