
308612-14.00 Rev 00
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Contents
Preface
Before You Begin .............................................................................................................xix
Text Conventions ............................................................................................................. xx
Acronyms .........................................................................................................................xxi
Hard-Copy Technical Manuals ........................................................................................xxv
How to Get Help ............................................................................................................xxvi
Chapter 1
Understanding ATM,
ATM Router Redundancy, and OAM
ATM General Information ................................................................................................1-2
ATM Cells .................................................................................................................1-2
Cell Header ........................................................................................................1-3
Cell Information Field .........................................................................................1-4
Data Transmission ....................................................................................................1-4
Protocol Prioritization ...............................................................................................1-6
Permanent and Switched Virtual Connections .........................................................1-6
ATM Layers ..............................................................................................................1-6
Physical Layer ....................................................................................................1-7
ATM Layer ..........................................................................................................1-8
ATM Adaptation Layer ........................................................................................1-8
Service Records and Virtual Circuits .....................................................................1-10
Supported Protocols ........................................................................................1-10
Things to Remember .......................................................................................1-12
Rules for Editing Protocols ..............................................................................1-12
Data Encapsulation Methods .................................................................................1-13
LANE Encapsulation ........................................................................................1-13
LLC/SNAP Encapsulation ................................................................................1-14
NULL Encapsulation ........................................................................................1-14
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