Configuring PPP Features

Overview

3-1

Objectives

3-1

Outline

3-1

Describing PPP Features

3-3

Overview

3-3

Relevance

3-3

Objectives

3-3

Learner Skills and Knowledge

3-3

Outline

3-4

Remote Node Connections

3-5

PPP Architecture

3-7

HDLC and PPP Frames

3-9

Summary

3-10

Quiz

3-11

Quiz Answer Key

3-12

Configuring Basic PPP

3-13

Overview

3-13

Relevance

3-13

Objectives

3-13

Learner Skills and Knowledge

3-13

Outline

3-14

PPP: Enabling

3-15

PPP Session and EXEC Session

3-16

PPP and Asynchronous Interface: Enabling Commands

3-17

Autoselect

3-18

Asynchronous Interface Commands for Addressing

3-20

Summary

3-23

Quiz

3-24

Quiz Answer Key

3-25

Configuring LCP Options: Authentication with PAP and CHAP

3-27

Overview

3-27

Relevance

3-27

Objectives

3-27

Learner Skills and Knowledge

3-27

Outline

3-28

PPP Authentication

3-29

PPP Using PAP Authentication

3-30

PAP Configuration Example

3-31

PPP Using CHAP Authentication

3-32

CHAP Configuration Example

3-37

CHAP and PAP Configuration Authentication

3-38

Summary

3-39

Quiz

3-40

Quiz Answer Key

3-42

Configuring LCP Options: Callback and Compression

3-43

Overview

3-43

Relevance

3-43

Objectives

3-43

Learner Skills and Knowledge

3-43

Outline

3-44

PPP Callback Overview

3-45

Asynchronous Callback Operation Flowchart

3-47

PPP Callback Operation 3-48

Asynchronous Callback Line and Interface Commands 3-50

PPP Callback Client Configuration 3-51

PPP Callback Server Configuration 3-52

Compression and PPP 3-53

Compression Configuration 3-55

Compression Verification 3-56

Uncompressed Bytes 3-56

Throughput Ratio 3-56

Buffer Allocation 3-56

Bytes Transmitted 3-57

Bytes Received 3-57

Interpreting the show compress Command Output 3-57

Summary 3-58

Quiz 3-59

Quiz Answer Key 3-61

Configuring LCP Options: Multilink PPP_3-63

Overview 3-63

Relevance 3-63

Objectives 3-63

Learner Skills and Knowledge 3-63

Outline 3-64

Multilink PPP Overview 3-65

Multilink PPP Operation and Configuration 3-66

Multilink PPP Example 3-67

Summary 3-68

Quiz 3-69

Quiz Answer Key 3-70

Verifying and Debugging PPP_3-71

Overview 3-71

Relevance 3-71

Objectives 3-71

Learner Skills and Knowledge 3-71

Outline 3-72

PPP Verification 3-73

show dialer Command Example 3-74

PPP Debugging 3-75

Multilink Verification 3-76

Summary 3-78

Next Steps 3-78

Quiz 3-79

Quiz Answer Key 3-80

Accessing Broadband_4-1

Overview 4-1

Objectives 4-1

Outline 4-1

Identifying Broadband Features_4-3

Overview 4-3

Relevance 4-3

Objectives 4-3

Learner Skills and Knowledge 4-3

Outline 4-4

Broadband Uses 4-5

Cable Options 4-6

DSL Options 4-7

Satellite Options 4-8

Wireless Options 4-9

Summary 4-11

Quiz 4-12

Quiz Answer Key 4-14

Addressing Broadband with NAT_4-15

Overview 4-15

Relevance 4-15

Objectives 4-15

Learner Skills and Knowledge 4-15

Outline 4-16

NAT Overview 4-17

NAT Concepts and Terminology 4-18

NAT Operation 4-20

Inside Source Address Translation 4-21

Inside Global Address Overload 4-23

Dynamic NAT Configuration 4-24

Inside Global Address Overload Configuration 4-26

NAT Verification and Troubleshooting 4-27

NAT Troubleshooting 4-29

NAT Entry Clearing 4-31

Summary 4-32

Quiz 4-33

Quiz Answer Key 4-35

Describing Cable Technology_4-37

Overview 4-37

Relevance 4-37

Objectives 4-37

Learner Skills and Knowledge 4-37

Outline 4-38

Cable Features 4-39

Data over Cable 4-40

Cable System Functionality 4-41

Cable System Components 4-43

Hybrid Fiber-Coaxial Architecture 4-44

Digital Signals over RF Channels 4-45

Cable Technology Terms 4-48

Cable Technology: Putting It All Together 4-52

Process for Provisioning a Cable Modem 4-53

Configuration of a Router with a Cable Modem 4-54

Summary 4-56

Quiz 4-57

Quiz Answer Key 4-59

Defining DSL Technology_4-61

Overview 4-61

Relevance 4-61

Objectives 4-61

Learner Skills and Knowledge 4-61

Outline 4-62

DSL Features 4-63

DSL Types 4-64

DSL Limitations 4-66

ADSL 4-67

ADSL and POTS Coexistence

4-68

ADSL Channels and Encoding

4-69

Data over ADSL: Bridging

4-71

Data over ADSL: PPPoE

4-73

Data over ADSL: PPPoA

4-77

Summary

4-78

Quiz

4-79

Quiz Answer Key

4-82

Configuring the CPE as the PPPoE Client

4-83

Overview

4-83

Relevance

4-83

Objectives

4-83

Learner Skills and Knowledge

4-84

Outline

4-84

Configuration of a Cisco 827 Router as the PPPoE Client

4-85

Configuration of PPPoE in a VPDN Group

4-86

Configuration of a PPPoE Client

4-87

Configuration of the PPPoE DSL Dialer Interface

4-88

Configuration of PAT

4-89

PAT Configuration Example

4-90

DHCP to Scale DSL

4-91

Configuration of a DHCP Server

4-92

Configuration of a Static Default Route

4-93

PPPoE Sample Configuration

4-94

Summary

4-95

Quiz

4-96

Quiz Answer Key

4-97

Configuring DSL with PPPoA

4-99

Overview

4-99

Relevance

4-99

Objectives

4-99

Learner Skills and Knowledge

4-99

Outline

4-100

Configuration of a PPPoA DSL Connection

4-101

DSL Modulation Configuration

4-102

Configuration of the DSL ATM Interface

4-103

Configuration of the DSL Dialer Interface

4-104

Configuration of PAT

4-105

PAT Configuration Example

4-106

DHCP to Scale DSL

4-107

Configuration of a Static Default Route

4-108

PPPoA Sample Configuration

4-109

Summary

4-110

Quiz

4-111

Quiz Answer Key

4-112

Troubleshooting DSL

4-113

Overview

4-113

Relevance

4-113

Objectives

4-113

Learner Skills and Knowledge

4-113

Outline

4-114

Layer Troubleshooting

4-115

Layer 1 Issues

4-116

Administratively Down State for an ATM Interface

4-118

Correct Power Supply

4-119

Correct DSL Operating Mode

4-120

Layer 2 Issues

4-121

Data Received from the ISP

4-122

Proper PPP Negotiation

4-123

Summary

4-124

Next Steps

4-124

Quiz

4-125

Quiz Answer Key

4-126

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