Chapter 8: Basic BGP

Outline:

Chapter Review 
Chapter Overview 
8.1 Autonomous Systems
8.1.1 Segregation of the Internet into Autonomous Systems
8.1.2 Static Routing, Default Routing and Dynamic Routing
8.1.3 Characteristics of an Autonomous System
8.1.4 Stub Autonomous System
8.1.5 Multihomed Nontransit AS
8.1.6 Multihomed Transit AS
8.1.7 BGP and ISP Connectivity Basics
8.1.8 When Not to Use BGP to Connect to an ISP
8.2 BGP Basic Operations
8.2.1 BGPv4
8.2.2 How BGP Works
8.2.3 BGP Message Header Format
8.3 BGP Neighbor Negotiation
8.3.1 OPEN Message Format
8.3.2 Finite State Machine Perspective Example
8.3.3 NOTIFICATION Message
8.3.4  KEEPALIVE Message
8.3.5 UPDATE Message and Routing Updates
8.3.6 Network Layer Reachability Information
8.3.7 Withdrawn Routes
8.3.8 Path Attributes
8.4 BGP Basic Configuration
8.4.1 EBGP and IBGP
8.4.2 Configuring EBGP for a Single Connection to an ISP
8.4.3 Simple BGP Configuration Example
8.4.4  Compare and Contrast EBGP and IBGP Configurations
8.5 Verifying BGP Operation
8.5.1 Show Commands
8.6 Peering
8.6.1 Configuration Example: Building Peering Sessions
8.6.2 How to Maintain BGP Continuity Inside an AS
8.6.3 How Synchronization within an AS Occurs
8.7 The Routing Process
8.7.1 Route Exchange
8.7.2 Routes Received from Peers
8.7.3 A Routing Environment Example
8.7.4  BGP Route Maps
8.7.5 CIDR and Aggregate Addresses
8.7.6 How to Control BGP Routes with BGP Attributes
8.7.7 The Next-Hop Attribute
8.7.8 Next-Hop Behavior on Multiaccess Media
8.7.9 Next-Hop Behavior over NBMA
8.7.10 Describe the AS_path Attribute
8.8 Issue with Using Private AS Numbers
8.8.1 Conserving AS Numbers
8.8.2 Configuration Example: Removing Private AS Numbers
8.8.3 Why and How to Manipulate AS_path Information
8.8.4 Configuration Example: AS_path Manipulation
8.8.5 The Local Preference Attribute
8.8.6 Configuration Example: Setting The Local Preference Attribute
8.8.7 The Multiexit Discriminator (MED) Attribute
8.8.8 Configuration Example: MED
8.8.9 ORIGIN Attribute 
8.8.10 The BGP Decision Process
Chapter Summary
Chapter Quiz