The All-New Switch Book

Networks, and with them LAN switching, have seen significant changes since this book s bestselling predecessor was first published. Written by an innovator who has been at the forefront of networking technology for more than two decades, The All New Switch Book covers everything readers need to know about LAN switching.

Informationen zum Autor Rich Seifert is President of Networks & Communications Consulting. He has contributed to the design of a wide range of products including LAN switches. Jim Edwards is a Nortel Networks certified support specialist specializing in network architecture, specifically switching, and virtual private networks. Working in the Premium Support Group consisting of Nortel's largest Enterprise customers, he has extensive experience with switching technologies. Klappentext Einzigartiges Referenzwerk zur LAN Switching Technologie, umfassend überarbeitet und aktualisiert.Vermittelt ein solides Verständnis der mitunter komplexen Features und Optionen für LAN Switches.Dokumentiert ausführlich alle Neuerungen zu Netzwerkschichten, Ethernet, Fast Ethernet, LAN-Segmentierung, Layer 3- und Layer 4-Switches, Multilayer-Switches, MLT, IST, SMLT, Sicherheit, QoS und Troubleshooting.Deckt das komplette Themenspektrum ab - angefangen bei Switch-Funktionen und -Features, über Anwendung und Design von LAN Switches und Switched Networks, bis hin zu Technologieintegration und Netzwerkmanagement.Enthält auch bislang unveröffentlichtes Material zu Link Aggregation, Virtuellen LANs und Layer 3-Switches. Zusammenfassung Networks, and with them LAN switching, have seen significant changes since this book's bestselling predecessor was first published. Written by an innovator who has been at the forefront of networking technology for more than two decades, The All-New Switch Book covers everything readers need to know about LAN switching. Inhaltsverzeichnis Preface xxiii Introduction xxv Part One Foundations of LAN Switches Chapter 1 Laying the Foundation 3 Network Architecture 4 Physical Layer 5 Data Link Layer 6 Network Layer 7 Transport Layer 7 Session Layer 8 Presentation Layer 8 Application Layer 9 Layering Makes a Good Servant but a Bad Master 9 Inside the Data Link Layer 12 Modes of Operation 12 Data Link Sublayering 15 Logical Link Control 16 Addressing 19 Local and Global Uniqueness 19 LAN Data Link Addresses 20 Unicast and Multicast Addresses 21 Globally Unique and Locally Unique MAC Addresses 23 How LAN Addresses Are Assigned 24 Written Address Conventions 26 LAN Technology Review 27 Ethernet 27 Ethernet Medium Access Control 28 Ethernet Physical Layer Options and Nomenclature 31 Ethernet Frame Formats 33 Bit-Ordering 38 Token Ring 38 Token Ring Medium Access Control 39 Token Ring Physical Layer Options 41 Token Ring Frame Formats 41 Bit-Ordering on Token Ring LANs 43 Fiber Distributed Data Interface 43 FDDI Operation 43 FDDI Physical Signaling 45 FDDI Frame Format 45 Other LAN Technologies 46 IEEE LAN Standards 48 IEEE 802 Organization 49 IEEE 802 Naming Conventions, or ''Mind Your Ps and Qs'' 50 Ieee 802.1 51 Ieee 802.3 53 Ieee 802.5 54 Other Standards Organizations 54 Terminology 55 Applications, Clients, and Service Providers 56 Encapsulation 57 Stations and Interconnections 59 Chapter 2 Transparent Bridges 63 Principles of Operation 63 Unicast Operation 65 Unknown and Multicast Destinations 66 Generating the Address Table 68 Address Table Aging 69 Process Model of Table Operation 70 Custom Filtering and Forwarding 72 Multiple Bridge Topologies 73 Transparent Bridge Architecture 74 Maintaining the Link Invariants 76 The Hard Invariants Are Hard Indeed 78 Soft Invariants 80 Implementing the Bridge Address Table 84 Table Operations 85 Search Algorithms 85 Hash Table...

Auteur

Rich Seifert is President of Networks & Communications Consulting. He has contributed to the design of a wide range of products including LAN switches.

Jim Edwards is a Nortel Networks certified support specialist specializing in network architecture, specifically switching, and virtual private networks. Working in the Premium Support Group consisting of Nortel's largest Enterprise customers, he has extensive experience with switching technologies.

Texte du rabat

Einzigartiges Referenzwerk zur LAN Switching Technologie, umfassend überarbeitet und aktualisiert. Vermittelt ein solides Verständnis der mitunter komplexen Features und Optionen für LAN Switches. Dokumentiert ausführlich alle Neuerungen zu Netzwerkschichten, Ethernet, Fast Ethernet, LAN-Segmentierung, Layer 3- und Layer 4-Switches, Multilayer-Switches, MLT, IST, SMLT, Sicherheit, QoS und Troubleshooting. Deckt das komplette Themenspektrum ab - angefangen bei Switch-Funktionen und -Features, über Anwendung und Design von LAN Switches und Switched Networks, bis hin zu Technologieintegration und Netzwerkmanagement. Enthält auch bislang unveröffentlichtes Material zu Link Aggregation, Virtuellen LANs und Layer 3-Switches.

Contenu

Preface xxiii

Introduction xxv

Part One Foundations of LAN Switches

Chapter 1 Laying the Foundation 3

Network Architecture 4

Physical Layer 5

Data Link Layer 6

Network Layer 7

Transport Layer 7

Session Layer 8

Presentation Layer 8

Application Layer 9

Layering Makes a Good Servant but a Bad Master 9

Inside the Data Link Layer 12

Modes of Operation 12

Data Link Sublayering 15

Logical Link Control 16

Addressing 19

Local and Global Uniqueness 19

LAN Data Link Addresses 20

Unicast and Multicast Addresses 21

Globally Unique and Locally Unique MAC Addresses 23

How LAN Addresses Are Assigned 24

Written Address Conventions 26

LAN Technology Review 27

Ethernet 27

Ethernet Medium Access Control 28

Ethernet Physical Layer Options and Nomenclature 31

Ethernet Frame Formats 33

Bit-Ordering 38

Token Ring 38

Token Ring Medium Access Control 39

Token Ring Physical Layer Options 41

Token Ring Frame Formats 41

Bit-Ordering on Token Ring LANs 43

Fiber Distributed Data Interface 43

FDDI Operation 43

FDDI Physical Signaling 45

FDDI Frame Format 45

Other LAN Technologies 46

IEEE LAN Standards 48

IEEE 802 Organization 49

IEEE 802 Naming Conventions, or ''Mind Your Ps and Qs'' 50

Ieee 802.1 51

Ieee 802.3 53

Ieee 802.5 54

Other Standards Organizations 54

Terminology 55

Applications, Clients, and Service Providers 56

Encapsulation 57

Stations and Interconnections 59

Chapter 2 Transparent Bridges 63

Principles of Operation 63

Unicast Operation 65

Unknown and Multicast Destinations 66

Generating the Address Table 68

Address Table Aging 69

Process Model of Table Operation 70

Custom Filtering and Forwarding 72

Multiple Bridge Topologies 73

Transparent Bridge Architecture 74

Maintaining the Link Invariants 76

The Hard Invariants Are Hard Indeed 78

Soft Invariants 80

Implementing the Bridge Address Table 84

Table Operations 85

Search Algorithms 85

Hash Tables 85

Binary Search 88

Content-Addressable Memories 90

How Deep Is Your Table? 92

Aging Entries from the Table 93

Bridge Performance 95

What Does It Take to Be the Best? 95

If You're Not the Best, How Good Are You? 97

The IEEE 802.1D Standard 98

Operating Parameters and Requirements 99

Aging Time 99

Bridge Transit Delay 99

Additional Operating Requirements 101

Bridge Address Assignment 102

Reserved Addresses 103

Chapter 3 Bridging Between Technologies 105

Bridging the LAN Gap 106

LAN Operational Mechanisms 107

Frame Format Translation 108

MAC-Specific Fields 109

User Data Encapsulation 110

Translating Versus Encapsulating Bridges 115

Issues in Bridging Dissimilar LANs 117

Maximum Transmission Unit (MTU) 117

Frame Check Protection 124

Bit-Ordering 126

Functional Groups Versus True Multicast Addressing 131

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