Multifunction Switch User Guide

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