Uni Signaling; Ilmi 4.0; Pnni - Avaya P550R User Manual

UNI Signaling

ILMI 4.0

PNNI

Avaya P550R/P580/P880/P882 Multiservice Switch ATM Uplink Module User Guide, Version 2.0
In an RFC 1483 environment, each PVC has its own set of QoS
parameters. Traffic priority to channel mapping is done through a
link that groups up to eight channels to a common ATM end point.
User-to-Network Interface Signaling (UNI) dynamically creates and
removes Switched Virtual Connections (SVCs) in an ATM network.
The higher layer ATM protocols, specifically LANE, use the UNI
signaling for connectivity.
The Integrated Local Management Interface (ILMI) protocol
provides the ATM Uplink module with status and configuration
information across the user-to-network interface. This information
includes ATM network prefixes, registered services, and capabilities.
Private Network-to-Network Interface (PNNI) is a dynamic routing
protocol that manages and allocates network resources for SVCs in
an ATM network. Because the ATM Uplink module implements
PNNI in non-transit mode, the ATM Uplink module does not act as
an intermediate ATM switch in an ATM network. This provides
high-performance edge access and load-sharing.
PNNI provides the ability to distribute topology information
throughout the network. The ATM Uplink module is capable of
having multiple active links, so PNNI is used to make routing
selections to optimize link utilization and provide load sharing.
When a connection with specific QoS parameters is requested, PNNI
is able to dynamically find a path (if any) satisfying the request,
allocate the necessary resources in the network, and provision the
connection.
PNNI enables the network to respond quickly to link failures, link
recoveries, and changing network loads on any link. The network is
able to adapt to changes in the addressing of a network or the
topology of the network as switches are added or deleted.
Overview
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