Cabletron Systems bridges, switches Token Ring 2-7

Token Ring 2-7

Review of Networking

Token Ring networks can use a variety of physical cabling, including Unshielded

Twisted Pair (UTP), Shielded Twisted Pair (STP), or ﬁber optic cabling. The

characteristics of the various cables can directly impact the operational limitations

of a Token Ring network which uses a particular media.

• Lobe Cable Lengths for 4 Mbps Token Rings: The operation of a 4 Mbps Token

Ring network imposes some relatively generous limitations on the maximum

length of any station cable (also called a lobe cable) connected to an active port

in the network as shown in the following list:

-IBM Types 1, 2 STP: 300 m

-IBM Types 6, 9 STP: 200 m

-Category 5 UTP: 250 m

-Categories 3, 4 UTP: 200 m

-Multimode Fiber Optics: 2000 m

-Single Mode Fiber Optics: 2000 m

• Lobe Cable Lengths for 16 Mbps Token Rings: 16 Mbps Token Ring networks

also impose limitations on the maximum length of any media connected to an

active port as shown in the following list:

-IBM Types 1, 2 STP: 150 m

-IBM Types 6, 9 STP: 100 m

-Category 5 UTP: 120 m

-Categories 3, 4 UTP: 100 m

-Multimode Fiber Optics: 2000 m

-Single Mode Fiber Optics: 2000 m

• RI/RO Cable Lengths for 4 Mbps Token Rings: 4 Mbps Token Ring networks

also require that Ring-In/Ring-Out (RI/RO) connections be no longer than a

certain amount. This amount is dependent upon the media being used for the

RI/RO connection as shown in the following list:

-IBM Types 1, 2 STP: 770 m

-Category 5 UTP: 250 m

-Categories 3, 4 UTP: 200 m

-Multimode Fiber Optics: 2000 m

-Single Mode Fiber Optics: 2000 m

• RI/RO Cable Lengths for 16 Mbps Token Rings: 16 Mbps Token Ring networks

also require that Ring-In/Ring-Out (RI/RO) connections not exceed the

lengths given below:

-IBM Types 1, 2 STP: 346 m

-Category 5 UTP: 120 m

-Categories 3, 4 UTP: 100 m

-Multimode Fiber Optics: 2000 m

-Single Mode Fiber Optics: 2000 m

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