
308628-15.0 Rev 00
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Contents
Preface
Before You Begin ............................................................................................................. xv
Text Conventions .............................................................................................................xvi
Acronyms .......................................................................................................................xviii
Related Publications ........................................................................................................ xx
How to Get Help ..............................................................................................................xxi
Chapter 1
Exterior Gateway Protocols (BGP and EGP)
Autonomous Systems and Gateway Protocols ...............................................................1-1
Border Gateway Protocol (BGP) ..............................................................................1-3
Exterior Gateway Protocol (EGP) .............................................................................1-3
Classless Interdomain Routing ................................................................................1-4
BGP Concepts and Terminology .....................................................................................1-4
Peer-to-Peer Sessions .............................................................................................1-5
Stub and Multihomed Autonomous Systems ...........................................................1-6
Interior BGP Routing ................................................................................................1-6
IBGP Route Reflector ...............................................................................................1-7
Equal-Cost Multipath ................................................................................................1-8
BGP Updates ...........................................................................................................1-8
Path Attributes ..........................................................................................................1-9
BGP/OSPF Interaction ...........................................................................................1-10
BGP-4 Confederations ...........................................................................................1-11
BGP-4 TCP MD5 Message Authentication ............................................................1-11
BGP Implementation Notes ..........................................................................................1-12
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