Cabletron Systems bridges, switches Fast Ethernet

7-1

Chapter 7

Fast Ethernet

This chapter examines the decisions and selections that must be made when designing a Fast

Ethernet workgroup solution.

Should a Fast Ethernet workgroup solution be selected, the Network Designer has

a speciﬁc series of issues to resolve and decisions to make before selecting a Fast

Ethernet device that meets the requirements of the network. This chapter

identiﬁes and discusses these issues and provides a series of examples for

different Fast Ethernet network approaches.

Fast Ethernet Workgroup Devices

The following sections present and describe the various Cabletron Systems

workgroup networking devices that may be used to implement a Fast Ethernet

networking solution.

Shared Devices

The selection ﬁeld of Fast Ethernet networking devices is much narrower than

that available for Ethernet workgroups. The Fast Ethernet devices available from

Cabletron Systems are all 100BASE-TX compliant Class I repeaters or switches.

The currently-available Class I repeaters, which are shared Fast Ethernet devices,

are listed in Table 7-1, below.

Contents

Main Page i Notice Notice Page Contents Contents iv Chapter 5 Network Design Chapter 8 Token Ring Chapter 7 Fast Ethernet Chapter 6 Ethernet Appendix A Charts and Tables Page 1-1 Chapter 1 Introduction Using This Guide Cabletron Systems Networking Guide - MMAC-FNB Solutions Document Organization Introduction Document Conventions 1-3 Document Conventions Additional Assistance Warnings and Notications Formats Related Documentation Chapter 2 Review of Networking 2-2 Ethernet Ethernet Fast Ethernet 2-3 Fast Ethernet 2-4 Fast Ethernet Token Ring 2-5 Token Ring 2-6 Token Ring Token Ring 2-7 2-8 Token Ring Page Page Chapter 3 The Workgroup Approach Standalones 3-2 Standalones Standalones, the Original Networking Devices Standalones 3-3 Management of Standalones Limitations of Standalones 3-4 Stackables Stackables physical organization logical organization Stackables 3-5 How Stacks Work HubSTACK Interconnect Cable REAR VIEW SEHI Managing 4 SEH Non-Intelligent Hubs 3-6 Stackables Intelligence in the Stack Internetworking for Stacks Stackables 3-7 Limitations of Stacks 3-8 Stackables 4-1 Chapter 4 PIMs and BRIMs PIM Port Interface Modules Device 4-2 Port Interface Modules EPIM-F2 Port Interface Modules 4-3 4-4 Port Interface Modules Port Interface Modules 4-5 4-6 Port Interface Modules Port Interface Modules 4-7 4-8 Bridge/Router Interface Modules Bridge/Router Interface Modules Types of BRIMs Bridge/Router Interface Modules 4-9 Page 5-1 Chapter 5 Network Design The following chapter discusses some of the more common approaches to workgroup network design. 5-2 The Role of the Workgroup Cabletron Systems Networking Guide - MMAC-FNB Solutions. The Role of the Workgroup Workgroup Establishment Criteria Page The Role of the Workgroup 5-5 Page Page 5-8 The Role of the Workgroup The Role of the Workgroup 5-9 Selecting Workgroup Technologies 5-10 Creating a Manageable Plan Creating a Manageable Plan Logical Layout Creating a Manageable Plan 5-11 5-12 Creating a Manageable Plan Fault Aversion Creating a Manageable Plan 5-13 5-14 Creating a Manageable Plan Network Maps and Record Keeping Network Expandability 5-15 Network Expandability 5-16 The Workgroup as the Network The Workgroup as the Network The Workgroup in the Larger Network The Workgroup in the Larger Network 5-17 What Is a Backbone? Methods of Conguring Backbones 5-18 The Workgroup in the Larger Network Page Page The Workgroup in the Larger Network 5-21 Choosing Backbone Technologies Page Chapter 6 Ethernet 6-2 Ethernet Workgroup Devices Ethernet Workgroup Devices Ethernet Workgroup Devices 6-3 6-4 Ethernet Workgroup Devices Switched Devices Ethernet Workgroup Design 6-5 Ethernet Workgroup Design The Home Ofce 6-6 Ethernet Workgroup Design Ethernet Workgroup Design 6-7 6-8 Ethernet Workgroup Design Ethernet Workgroup Design 6-9 6-10 Ethernet Workgroup Design Ethernet Workgroup Design 6-11 The Small Ofce 6-12 Ethernet Workgroup Design Ethernet Workgroup Design 6-13 6-14 Ethernet Workgroup Design Ethernet Workgroup Design 6-15 6-16 Ethernet Workgroup Design The Remote Ofce Ethernet Workgroup Design 6-17 6-18 Ethernet Workgroup Design Ethernet Workgroup Design 6-19 The High-End Department WAN (56K) 6-20 Ethernet Workgroup Design Ethernet Workgroup Design 6-21 6-22 Ethernet Workgroup Design Ethernet Workgroup Design 6-23 6-24 Ethernet Workgroup Design Permutations 7-1 Chapter 7 Fast Ethernet Fast Ethernet Workgroup Devices 7-2 Fast Ethernet Workgroup Devices Switched Devices Fast Ethernet Workgroup Design 7-3 Fast Ethernet Workgroup Design Small Ofces 7-4 Fast Ethernet Workgroup Design Fast Ethernet Workgroup Design 7-5 7-6 Fast Ethernet Workgroup Design High-End Department Fast Ethernet Workgroup Design 7-7 7-8 Fast Ethernet Workgroup Design Fast Ethernet Workgroup Design 7-9 Fast Ethernet as a Backbone 7-10 Fast Ethernet Workgroup Design Fast Ethernet Workgroup Design 7-11 7-12 Fast Ethernet Workgroup Design 8-1 Chapter 8 Token Ring Token Ring Workgroup Devices 8-2 Token Ring Workgroup Devices Token Ring Workgroup Design 8-3 Token Ring Workgroup Design Small Ofce 8-4 Token Ring Workgroup Design Token Ring Workgroup Design 8-5 8-6 Token Ring Workgroup Design Token Ring Workgroup Design 8-7 Page A-1 Appendix A Charts and Tables Workgroup Design Tables Ethernet A-2 Workgroup Design Tables Fast Ethernet Workgroup Design Tables A-3 Token Ring A-4 Workgroup Design Tables PIMs and BRIMs Workgroup Design Tables A-5 A-6 Workgroup Design Tables Networking Standards and Limitations A-7 Networking Standards and Limitations Ethernet A-8 Networking Standards and Limitations Fast Ethernet Networking Standards and Limitations A-9 Token Ring A-10 Networking Standards and Limitations Networking Standards and Limitations A-11 FDDI Page Glossary Page Page Page Page Page Page Page Page Page Page Page Index-1 Index Numerics A B C H I N P R