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Avaya M770 M-ACCF/SF ATM Access Modules User’s Guide i
Contents
Introduction......................................................................................................... I
ATM Terminology ...................................................................................I
Finding Information in This Guide .......................................................... II
Conventions........................................................................................... III
Contents................................................................................................................ i
List of Figures.................................................................................................. vii
List of Tables...................................................................................................... ix
Chapter 1 Overview............................................................................................................. 1
ATM Access Modules ............................................................................... 1
Features and Benefits............................................................................... 1
ATM Benefits ...........................................................................................1
ATM Access Module Features ..............................................................2
Avaya M770 Frame Switch Domains....................................................... 2
M-ACC Module Architecture ...............................................................2
Network Layer Concepts — LAN Emulation ........................................... 3
LAN Emulation Overview ....................................................................3
Emulated LAN Components ................................................................3
LAN Emulation Client (LEC) ....................................................3
LAN Emulation Server (LES) ....................................................4
Broadcast and Unknown Server (BUS) ....................................4
LAN Emulation Configuration Server (LECS) .......................4
Emulated LAN Connections .................................................................5
Control VCCs ...............................................................................5
Data VCCs ....................................................................................6
Frame Ordering ...........................................................................7
Operation of the LAN Emulation .........................................................8
Connecting a LEC to an ELAN .................................................8
Registration ..................................................................................9
Address Resolution ...................................................................10
Connection Management .........................................................10
LAN Emulation Components in Your Network ..................10
Joining the ELAN ......................................................................12
Mapping Ethernet and ATM Addresses ................................12
What Happens to Unicast Frames? ........................................14
What Happens to Broadcast and Multicast Frames? ...........14