
303535-A Rev 00
v
Contents
Preface
Before You Begin .............................................................................................................xiii
Text Conventions .............................................................................................................xiv
Acronyms ......................................................................................................................... xv
Bay Networks Technical Publications .............................................................................xvii
How to Get Help .............................................................................................................xvii
Chapter 1
OSI Overview
OSI Basic Reference Model ...........................................................................................1-2
OSI Network Organization ..............................................................................................1-3
Level 1 and Level 2 Routing .....................................................................................1-4
Level 1 Routing ..................................................................................................1-5
Level 2 Routing ..................................................................................................1-6
OSI Network Addressing ..........................................................................................1-6
NSAP Structure .................................................................................................1-7
Allocating NSAP Addresses ............................................................................1-13
OSI Basic Routing Algorithm ........................................................................................1-17
Update Process ......................................................................................................1-18
Decision Process ...................................................................................................1-20
Forwarding Process ...............................................................................................1-21
OSI Routing Protocols ..................................................................................................1-22
Connectionless Network Service Protocol .............................................................1-22
End System to Intermediate System Routing Exchange Protocol .........................1-23
Configuration Reporting ...................................................................................1-23
Route Redirecting ............................................................................................1-24
Intermediate System to Intermediate System
Intra-Domain Routing Exchange Protocol ..............................................................1-26
Intra-Domain Routing ......................................................................................1-26
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