
117356-E Rev 00
v
Contents
Preface
Before You Begin ............................................................................................................xvii
Text Conventions ...........................................................................................................xviii
Acronyms .........................................................................................................................xix
Related Publications ........................................................................................................xxi
How to Get Help .............................................................................................................xxii
Chapter 1
IP Concepts, Terminology, and Features
IP Addresses ..................................................................................................................1-2
Subnet Addressing ...................................................................................................1-4
Supernet Addressing ...............................................................................................1-7
Classless Interdomain Routing ................................................................................1-8
Autonomous Systems .....................................................................................................1-8
Address Resolution Protocol (ARP) .............................................................................1-10
Routing Information Protocol (RIP) ...............................................................................1-11
Open Shortest Path First (OSPF) Protocol ...................................................................1-12
OSPF Addresses and Variable-Length Masks .......................................................1-12
OSPF Neighbors ....................................................................................................1-13
Neighbor Adjacencies ............................................................................................1-13
Designated Routers ...............................................................................................1-14
OSPF Areas ...........................................................................................................1-15
Stub Area .........................................................................................................1-16
Not-So-Stubby Area (NSSA) ...........................................................................1-16
OSPF Router Types ...............................................................................................1-17
AS External Routes ................................................................................................1-17
OSPF Implementation Notes .................................................................................1-18
Router Discovery Protocol ............................................................................................1-19
Route Preferences ........................................................................................................1-19
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