Atm Interfaces - Avaya M-ACCF/SF User Manual

Chapter 1 Overview

ATM Interfaces

ATM technology is implemented in ATM edge-devices and ATM Switches.
ATM provides a User-to-Network Interface (UNI). The User-to-Network Interface
(UNI) is used to connect an ATM edge device to an ATM switch that is managed as
part of the same network.
ATM also provides a Network-to-Network Interface (NNI) that is typically used to
interconnect two ATM switches managed as part of the same network.
The ATM Interfaces are shown in Figure 1.13.
Figure 1.13 ATM Interfaces
The User-to-Network Interface (UNI) is managed by the Interim Local Management
Interface (ILMI) protocol.
Interim Local Management Interface (ILMI)
The ATM Forum produced the Interim Local Management Interface (ILMI) to increase
monitoring and diagnostic facilities, and to provide ATM address registration at the
User-to-Network Interface (UNI).
ILMI uses a Management Information Base (MIB) and the SNMP protocol.
Each device that provides ILMI support contains a UNI Management Entity (UME),
which uses SNMP to access management information stored in the ILMI MIB of the
adjacent switch, see Figure 1.14.
Avaya M770 M-ACCF/SF ATM Access Modules User's Guide 21