Total SNMP: Exploring the Simple Network Management Protocol Book

TABLE OF CONTENTS ..... v

PREFACE ..... XIII
Introduction ..... xiii
Audience ..... xiv
How This Book Is Organized ..... xv
Conventions Used in this Book ..... xvi
Acknowledgements ..... xvi
References for Preface ..... xvii

1 INTRODUCTION TO NETWORK MANAGEMENT ..... 1
1.1 Current Network Management Issues ..... 3
1.2 Network Management Architecture ..... 6

1.2.1 A Network Management Reference Model ..... 7
1.2.2 Internetworking Communications Models ..... 7
1.2.3 Internetworking Requirements ..... 13

1.3 Network Management Functional Requirements ..... 14

1.3.1 Fault Management ..... 15
1.3.2 Configuration Management ..... 16
1.3.3 Accounting Management ..... 17
1.3.4 Performance Management ..... 17
1.3.5 Security Management ..... 17

1.4 Introducing SNMP ..... 17

1.4.1 What SNMP Is ..... 18
1.4.2 What SNMP Is Not ..... 18

References for Chapter 1 ..... 19

2 THE "THEORY" OF SNMP ..... 20
2.1 A Brief History of SNMP ..... 22

2.1.1 Internet Architecture Board ..... 23
2.1.2 Request For Comments ..... 24
2.1.3 Structure of Management Information ..... 27
2.1.4 Management Information Base ..... 29
2.1.5 SNMP Protocol ..... 30

2.2 The SNMP Reference Model ..... 31

2.2.1 The Internetwork ..... 31
2.2.2 The Network Protocols ..... 32
2.2.3 The Network Manager ..... 39
2.2.4 The Managed Network Entity ..... 39

References for Chapter 2 ..... 40

3 THE STRUCTURE OF MANAGEMENT INFORMATION ..... 41
3.1 Abstract Syntax Notation One (ASN.1) ..... 44

3.1.1 ASN.1 Type Notation..... 45

3.2 Basic Encoding Rules (BER) ..... 47

3.2.1 ASN.1 Tagging ..... 48

3.3 MIB Objects Definition Formats ..... 51
3.4 SMI Definition ..... 53
References for Chapter 3 ..... 55

4 THE SNMP PROTOCOL ..... 56
4.1 Authentication and Authorization ..... 57
4.2 The SNMP Message ..... 58

4.2.1 The Get Request-PDU ..... 63
4.2.2 The Get Next Request-PDU ..... 64
4.2.3 The Set Request-PDU ..... 66
4.2.4 The Get Response-PDU ..... 68
4.2.5 The Trap-PDU ..... 70

4.3 How the Protocol Works ..... 73
4.4 Table Handling ..... 74

4.4.1 Row Creation ..... 74
4.4.2 Row Deletion ..... 75
4.4.3 Bulk Table Retrieval ..... 75

4.5 The Protocol Definition ..... 76
References for Chapter 4 ..... 76

5 THE MANAGEMENT INFORMATION BASE ..... 77
5.1 The MIB-II SubTree ..... 84

5.1.1 The System Group ..... 88
5.1.2 The Interfaces Group ..... 89
5.1.3 The Address Translation Group ..... 90
5.1.4 The Internet Protocol Group ..... 91
5.1.5 The Internet Control Message Protocol Group ..... 92
5.1.6 The Transmission Control Protocol Group ..... 93
5.1.7 The User Datagram Protocol Group ..... 94
5.1.8 The Exterior Gateway Protocol Group ..... 95
5.1.9 The Transmission Group ..... 96
5.1.10 The SNMP Group ..... 110

5.2 Extensions to the MIB-II SubTree ..... 111

5.2.1 Generic Interface Extension MIB ..... 114
5.2.2 The AppleTalk MIB Group ..... 115
5.2.3 Open Shortest Path First MIB ..... 116
5.2.4 Border Gateway Protocol MIB ..... 117
5.2.5 Remote Network Monitoring MIB ..... 118
5.2.6 Managed Objects for Bridges ..... 119
5.2.7 DECnet Phase IV MIB Extensions ..... 120
5.2.8 Character Stream Device MIB ..... 121
5.2.9 MIB For The Administration of SNMP Parties ..... 122
5.2.10 MIB For SNMP Secrets ..... 123
5.2.11 MIB For IEEE 802.3 Repeater Devices ..... 124
5.2.12 RIP Version 2 MIB Extensions ..... 125
5.2.13 Identification MIB Group ..... 126

5.3 The Experimental SubTree ..... 127

5.3.1 The Connectionless Network Protocol MIB Group ..... 129

5.4 The Private SubTree ..... 130

5.4.1 The SMUX MIB Group ..... 142

5.5 The MIB Definition ..... 142
References for Chapter 5 ..... 143

6 THE "PRACTIC