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Cabletron Systems bridges, switches Bridge/Router Interface Modules

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PIMs and BRIMs

4-8 Bridge/Router Interface Modules

Bridge/Router Interface Modules

In the same way that Cabletron Systems supplied a method for connecting a

single network technology to different types of media, the Bridge/Router

Interface Module, or BRIM, allows one networking technology to be connected to

either a separate, segmented network or to a completely different networking

technology.

The addition of a BRIM to a networking device, be it a standalone Ethernet

repeater or a sophisticated management module within a modular chassis, allows

the device that the BRIM is conﬁgured in to access another network. The

interconnection of the device and the additional network is handled by the

internal operation of the BRIM.

In effect, the BRIM takes the concept of the PIM a step further. Rather than

internalizing a transceiver, the BRIM internalizes a dual-interface bridge or router,

supplying segmentation and internetworking capabilities to any BRIM-capable

device. As these capabilities are needed, a BRIM can be added to any

BRIM-capable device. This gradual upgrade path allows Network Designers to

plan ahead for the incorporation of new technologies without having to pay for

the connection until it is needed.

Types of BRIMs

There are a number of different BRIMs available, and each has different

capabilities and characteristics. The foremost of these characteristics are

summarized in Table 4-2 and the text which follows.

BRIM-E6

The BRIM-E6 provides a single Ethernet segment through an EPIM slot. This

EPIM slot may be conﬁgured with any EPIM module and operates as a normal,

bridged Ethernet interface. The BRIM provides Ethernet bridging between the

front panel EPIM slot and the BRIM interface within the device.

BRIM-E100

The BRIM-E100 operates in the same fashion as a BRIM-E6, but provides a

connection to a 100 Mbps Fast Ethernet link. The BRIM-E100 provides one front

panel EPIM-100 port which supports any of the Fast Ethernet Interface Modules.

NOTE Before including any BRIM in a network design, consult your

Cabletron Systems Sales Representative to ensure that the

BRIM under consideration will operate properly in the device

being considered for use.

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