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Cabletron Systems MMAC-5FNB Networking Manual

Other manuals for MMAC-5FNB: Overview And Setup Manual
Manual is about: Enterasys MMAC-5FNB Interface Module: Network Guide

Summary of MMAC-5FNB

  • Page 1

    Cabletron systems networking guide mmac-fnb™ solutions.

  • Page 3: Notice

    I notice cabletron systems reserves the right to make changes in specifications and other information contained in this document without prior notice. The reader should in all cases consult cabletron systems to determine whether any such changes have been made. The hardware, firmware, or software de...

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    Ii.

  • Page 5: Contents

    Iii contents chapter 1 introduction using this guide ......................................................................................................................... 1-1 organization of document....................................................................................................

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    Iv fiber distributed data interface ..............................................................................................3-15 abstract ................................................................................................................................3-15 theory ...................

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    V segmentation - special cases................................................................................................... 5-30 port assignment ................................................................................................................. 5-30 port assignment configuration....

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    Vi chapter 8 expansion - ethernet simple ethernet ............................................................................................................................8-1 adding stations .............................................................................................................

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    Vii appendix a charts & tables network design flowcharts .....................................................................................................A-2 ethernet network design flowchart................................................................................A-2 esxmim network design...

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    Viii.

  • Page 11: Chapter 1

    1-1 chapter 1 introduction using this guide the purpose of this networking guide is to provide the customers and strategic partners of cabletron systems with information which allows them to configure and expand their own networks. As it is impossible to foresee every possible situation that may ari...

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    Introduction 1-2 organization of document following the discussions of the major networking technologies supported, this guide shows how networks, based on the examples from the training sections, can be expanded. The remainder of this guide contains brief descriptions of cabletron systems modular c...

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    Conventions of this document 1-3 introduction conventions of this document warnings and notifications formats and measures figures throughout the document are identified by chapter and illustration number. Many figures contain small numbers at the lower right-hand corner of the illustration. These a...

  • Page 14: Additional Assistance

    Introduction 1-4 additional assistance additional assistance this publication describes many possible network configurations and designs. Due to the nearly limitless possibilities involved in network design, there are some aspects of the design process which are not addressed in this guide. If you h...

  • Page 15: Chapter 2

    2-1 chapter 2 overview of networking this chapter introduces and discusses several basic concepts and definitions essential to the understanding of local area networking. Discussion of networking why network? In this day and age, all companies and agencies have two resources in common, information a...

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    Overview of networking 2-2 discussion of networking the basis of the lan is sharing. The lan allows users to transfer information and completed documents without the overhead and delay introduced by hardcopy information. In addition, the lan increases the utility of expensive resources such as print...

  • Page 17: What Is A Network?

    What is a network? 2-3 overview of networking what is a network? Simply put, a local area network, or lan, is a number of related computers and electronic devices which share information over a transmission media. This can be as simple as a series of electronic cash registers which send updates of p...

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    Overview of networking 2-4 the classification of networks network topology the topology of a network refers to its physical layout or “shape.” the topology characteristic describes how components and cabling are interconnected. Using the meeting metaphor, the topology of a network can be seen as the...

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    The classification of networks 2-5 overview of networking bus the bus topology uses a single common cable or link (coaxial cable, broadcast radio frequency) to connect the stations of the network to one another. The bus topology is strictly an ethernet phenomenon, and is frequently encountered in ex...

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    Overview of networking 2-6 the classification of networks star the star topology consists of a number of individual stations which communicate through a common central point. Similar to the bus topology, star topology network stations all share a single common interface. In place of a section of cab...

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    The classification of networks 2-7 overview of networking media the term media has come to mean several different things in today’s english language. For the purposes of networking, media always refers to the physical entity that is used for the purposes of transmitting and receiving the impulses th...

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    Overview of networking 2-8 the classification of networks thick coaxial cable thick coaxial cable (also known as thick ethernet cable, “thicknet”, or 10base5 cable) is a cable constructed with a single solid core, which carries the network signals, and a series of layers of shielding and insulator m...

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    The classification of networks 2-9 overview of networking thin coaxial cable thin coaxial cable (also known as thin ethernet cable, “thinnet,” “cheapernet,” rg58 a/u, bnc or 10base2 cable) is a less shielded, and thus less expensive, type of coaxial cabling. Also used exclusively for ethernet networ...

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    Overview of networking 2-10 the classification of networks attachment unit interface (aui) attachment unit interface cable (referred to hereafter as aui cable, but which may also be called office transceiver cable or standard transceiver cable in other publications) is a shielded, multistranded cabl...

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    The classification of networks 2-11 overview of networking utp cabling is differentiated by the quality of the cable. Utp is divided into categories, which indicate the relative quality of the materials used and the processes used to manufacture the cables. The categories used in lans range from cat...

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    Overview of networking 2-12 the classification of networks fiber optic cabling is made up of a glass strand, the core, which allows for the easy transmission of light; the cladding, a glass layer around the core which helps keep the light within the core; and a plastic buffer which protects the cabl...

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    Interoperability and standards bodies 2-13 overview of networking interoperability and standards bodies interoperability, the ideal of networking ideally, all devices placed on any network should be able to transfer information in a usable fashion and understandable format to any other station. For ...

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    Overview of networking 2-14 interoperability and standards bodies the most common local area networking technologies (ethernet, token ring, and fddi) have standards ratified and in place for their operation and configuration. Atm, still in the draft stages in some aspects, is operating under a worki...

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    Interoperability and standards bodies 2-15 overview of networking there are seven layers in the osi model (see figure 2-6). They begin with the physical layer and end with the application layer. Each layer provides services to the layer above it. As the seventh layer is the ‘topmost’ layer, it serve...

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    Overview of networking 2-16 interoperability and standards bodies layer four: transport the transport layer deals with the optimization of data transfer from source to destination by managing network data flow and implementing the quality of service requested by the session layer. The transport laye...

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    Interoperability and standards bodies 2-17 overview of networking logical link control: the logical link control sub-layer is responsible for shielding the upper layers from any particular access method or media. The upper layers need not worry about wether they are connected to a token ring or ethe...

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    Overview of networking 2-18 interoperability and standards bodies application of the osi model a user’s perception of network operation appears as direct peer to peer communications. The user message appears to go from the sending application directly to the receiving application. In actuality, the ...

  • Page 33: Chapter 3

    3-1 chapter 3 technology basics this chapter presents the three main networking technologies that will be discussed throughout this book. The chapter does not cover these technologies in detail. This chapter introduces the fundamentals of the technologies to be discussed in this document. The inform...

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    Technology basics 3-2 ethernet theory ethernet, in its basic form, operates like a series of offices arranged along a central hallway. Each workstation in an ethernet network can be viewed as an office along this giant hallway. When one of these hypothetical offices needs to send information to anot...

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    Ethernet 3-3 technology basics all the information necessary for a station to receive and comprehend the network transmission is contained in the packet. The ethernet packet contains other fields related to ethernet operation which are not essential to a basic understanding of the technology. Proced...

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    Technology basics 3-4 ethernet segmentation the operation of ethernet networks is based on the fact that every workstation or device on the network is connected to every other device on the network. Due to this treatment, the larger the ethernet network gets, the more congested it becomes with added...

  • Page 37

    Ethernet 3-5 technology basics switches switches, in an ethernet environment, act like bridges. A switch connects one network to another. A switch, however, provides a dedicated connection at full ethernet speeds between devices. The important thing to realize about ethernet switches is that they ma...

  • Page 38

    Technology basics 3-6 ethernet strengths and weaknesses ethernet performance : at 10 mbps, ethernet networks are not the fastest category in the list of lan technologies, but they are perfectly capable of handling most types of office and technical traffic. Reliability : while ethernet networks are ...

  • Page 39

    Ethernet 3-7 technology basics segmented ethernet performance : segmented ethernet provides the same 10 mbps that simple ethernet networks do, but allows that bandwidth to be more effectively and efficiently utilized. A bridge connects two separate ethernet networks. By separating the ethernet stati...

  • Page 40

    Technology basics 3-8 ethernet switched ethernet performance : switched ethernet provides the same 10 mbps that simple ethernet networks do, but allows that bandwidth to be divided in much the same way as segmented ethernet (see above). Switches are used to provide dedicated connections between ethe...

  • Page 41: Token Ring

    Token ring 3-9 technology basics token ring abstract token ring is a networking technology developed in the early 1970s by researchers in sweden and the united states. The technology was embraced by ibm, and was standardized in 1985 by the ieee 802.5 group. The token ring standard is often referred ...

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    Technology basics 3-10 token ring no station may transmit normal data unless it has received the token from the station before it and ‘claimed’ it by not transmitting the token to the next station. It then transmits a data frame which is passed from station to station, with each station receiving th...

  • Page 43

    Token ring 3-11 technology basics token ring limitations are very restrictive, and all the restrictions are interrelated. The speed of the network (4 or 16 mbps), the amount of signal regeneration performed by the hardware, and the type of media to be used (utp, stp, or fiber optics) all act togethe...

  • Page 44

    Technology basics 3-12 token ring this new frame passes through the network to reach the station which originally formulated the request, and it builds its own routing database by reversing the order of the bridge identifications in the routing information field of the frame. From this point on, the...

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    Token ring 3-13 technology basics strengths and weaknesses token ring performance : token ring networks of all kinds are available in two speeds, 4 mbps and 16 mbps. The speed selected determines the rapidity of information exchange on the network, and also the number of stations which may be presen...

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    Technology basics 3-14 token ring cost : token ring equipment is inherently more specialized, and often more complex, than ethernet equipment with similar capabilities. This, in conjunction with the relatively smaller number of token ring networking hardware suppliers, tends to make the cost of impl...

  • Page 47

    Fiber distributed data interface 3-15 technology basics special design considerations • the orderly progression of transmission and reception throughout the token ring allows special fault identifications and automatic correction features to be built into the technology. • there are limitations to t...

  • Page 48

    Technology basics 3-16 fiber distributed data interface operation rings fddi operation is based on the movement of data around a series of rings. Like the organization of the token ring technology discussed earlier, fddi data passes from one station to another in a predetermined order. In fddi lans,...

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    Fiber distributed data interface 3-17 technology basics frames the fddi technology collects data into “frames” for transmission. A frame is a specific format for data and control information. There are two basic types of frames: network control frames and data frames. Network control frames are made...

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    Technology basics 3-18 fiber distributed data interface troubleshooting : in the event that an fddi network undergoes a failure, the network will literally bend over backwards in an effort to keep the network operating. The exceptionally fast reaction time on station and ring wrapping heals the fddi...

  • Page 51: Chapter 4

    4-1 chapter 4 network design this chapter deals with the process of visualizing and planning the basic form and operation of a network. The network design process is the formation of the network, from initial concept to the plan of implementation. In this networking guide, for the sake of brevity, t...

  • Page 52: Workgroup Creation

    Network design 4-2 workgroup creation workgroup creation what is a workgroup? A workgroup is a group of network end stations that are related in some way. The conditions of this relationship are determined by the network manager, and can be based on anything from device type to user occupation or ev...

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    Workgroup creation 4-3 network design figure 4-1. Geographical proximity workgroups having well defined rules of geographical proximity as the deciding factor in workgroup design does, however, make the physical act of fault recovery easier in many networks. If an entire location is suffering errors...

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    Network design 4-4 workgroup creation since most of the time business departments are involved with sharing information among other members of their department or a group of related departments (accounting, personnel, and payroll, for example), the division of the end user population into workgroups...

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    Workgroup creation 4-5 network design an even trade-off is made in reliability in networks organized in this fashion. While the organization of the network into departmental workgroups increases the inherent complexity of the network by creating several segments based on function, the loss of a work...

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    Network design 4-6 workgroup creation the creation of workgroups based on common function enhances the performance of those dedicated functions at a cost to the performance of the network as a whole. In addition, the management demands placed on a network by common function networks distributed acro...

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    Workgroup creation 4-7 network design priority organization of this manner in a single-segment network involves providing stations in the priority workgroups with qualities of media and network connection based on that priority. The stations in the server farm, to continue with that example, might h...

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    Network design 4-8 workgroup creation before planning the segmentation of a network, there are a number of things which should be considered and noted: • any locations which have regular and repeated periods of extremely high traffic (such as computer labs in instructional facilities) cause signific...

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    Workgroup creation 4-9 network design the initial field to begin, we gather the requisite information and determine the number of end stations that the network for this facility will have to support. This gives us the initial field of the network before any workgroups have been decided upon. Having ...

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    Network design 4-10 workgroup creation internal load the efficiency and speed of a network is dependent upon the traffic load of that network. This is one of the primary reasons for bridging; by keeping local traffic local, the performance of other network segments tends to increase. An examination ...

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    Workgroup creation 4-11 network design looking at the above example, it makes more sense to keep the records department workgroup ‘close’ to the other segments of the network. Since it requires access to other segments on a more frequent basis than the others, keeping the records workgroup from bein...

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    Network design 4-12 workgroup creation selecting workgroup technologies the selection of a network technology at the workgroup level is a very important decision, and one that should be made only after careful consideration and evaluation. Before deciding on a network technology to be used by the wo...

  • Page 63: Backbone Planning

    Backbone planning 4-13 network design backbone planning what is a backbone? A backbone is a network segment or cable which is used to provide for the interconnection of a number of smaller workgroups or self-contained networks. The outlying networks, workgroups, or hubs communicate with one another ...

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    Network design 4-14 backbone planning methods of configuring backbones backbone networks can be set up in a number of different ways. This networking guide will present three of the most common means of configuring backbone networks. From these three basic types; the distributed backbone, the collap...

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    Backbone planning 4-15 network design • limited control - the use of a distributed backbone makes the isolation of workgroups from the rest of the overall network somewhat time-consuming. If a workgroup in a distributed backbone needs to be disconnected from the other networks physically, for whatev...

  • Page 66

    Network design 4-16 backbone planning • ease of expandability - since the cables of the collapsed backbone originate from a patch panel in one location, adding new cable runs to accommodate new workgroups or to bypass outmoded ones is a simple matter of changing a few jumper cables. If the network c...

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    Backbone planning 4-17 network design the device collapsed backbone is the most expensive backbone choice, simply due to adding the cost of sophisticated, high-performance hardware to the costs of a collapsed backbone cabling layout. In many cases, the additional control and functionality provided b...

  • Page 68: Creating A Manageable Plan

    Network design 4-18 creating a manageable plan the determining factors in selecting a backbone network technology are the same as those used in selecting workgroup technologies - performance (speed of operation), reliability, ease of configuration, troubleshooting, and cost. In the backbone network,...

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    Creating a manageable plan 4-19 network design logical layout component location the actual locations of the networking hardware is an important aspect of logical layout. As a network designer, you should determine how you want to treat the placement of devices and hold to that decision whenever pos...

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    Network design 4-20 creating a manageable plan • keep cabling neatly organized. Bundle several cables together and secure them to places where they may be easily accessed. If one bundle of cables is associated with a specific workgroup or facility location, label that bundle periodically to eliminat...

  • Page 71

    Creating a manageable plan 4-21 network design fault aversion a good network design strategy realizes the importance of avoiding future trouble spots. It is possible to design a network such that the most dangerous of these trouble spots are either eliminated, covered by contingencies, or their effe...

  • Page 72

    Network design 4-22 creating a manageable plan when designing a network, check the descriptions of the products to see if they support the creation of redundant links to devices. It is often a good idea to have some form of back-up capability for the network. For example, an ethernet network can be ...

  • Page 73

    Creating a manageable plan 4-23 network design for example, a network map set might include a facility map showing the division of areas into workgroups, a map showing the location, layout, and type of physical cabling, one showing the locations of networking hardware, and individual maps showing th...

  • Page 74: Network Expandability

    Network design 4-24 network expandability network expandability networks tend toward growth. As businesses change and networking capabilities become more and more a part of the business process, networks grow in size or complexity and capability. For this reason, it is important, in any network, to ...

  • Page 75: Designing With The Mmac

    Designing with the mmac 4-25 network design cabletron systems has provided a seamless migration path to high speed technologies from the multi media access center through the use of bridge router interface modules (brims). Called a “module within a module,” brim modules can be plugged into an emm-e6...

  • Page 76

    Network design 4-26 designing with the mmac a benefit of the centralization of network connections into a modular chassis is the simplification of management functions. Network management is an essential part of the operation of any network, no matter if that management is simple troubleshooting or ...

  • Page 77

    Designing with the mmac 4-27 network design the mmac, as a modular networking chassis, makes this substitution and replacement a simple procedure. In order to make the ethernet repeating functionality of the network simple and easy to upgrade, replace, or remove, the ethernet repeater is often a dis...

  • Page 78

    Network design 4-28 designing with the mmac figure 4-9. Flexible network bus channels to reduce the costs of chassis failure, cabletron has designed the mmac chassis to be as modular as possible. Networking modules, power supplies, the cooling system, any device that the chassis requires for proper ...

  • Page 79

    Designing with the mmac 4-29 network design figure 4-10. Chassis, slots, and modules power redundancy fault-tolerance is also necessary in the supply of electrical power to the modular chassis. The chassis supplies all modules with electricity. The supply of power in the correct amperages and voltag...

  • Page 80

    Network design 4-30 designing with the mmac cabletron systems’ treatment of this issue is the utilization of load-sharing capabilities in the power supplies. Load-sharing power supplies examine the chassis they are in, and if they detect another power supply operating in the chassis, they each suppl...

  • Page 81: Chapter 5

    5-1 chapter 5 ethernet this chapter examines the ethernet network technology in detail and provides step-by-step design instructions for the creation of ethernet networks using cabletron systems networking products. Description ethernet is what is called a contention-based network technology that pr...

  • Page 82

    Ethernet 5-2 description if the technology was left at that, it is easy to see that it would not function with more than one station on the network not a very efficient networking solution. If two stations, which can transmit without requiring permission, both transmitted different packets at the sa...

  • Page 83

    Description 5-3 ethernet still, two stations may both listen to the line at the same time, and both transmit a short time after, causing a collision. That is where the cd portion of csma/cd comes into play. Collision detection means that if a station transmits and causes a collision, it will notice ...

  • Page 84

    Ethernet 5-4 description media while ethernet was originally designed to utilize coaxial cable, the vast majority of newly designed ethernet networks operate over unshielded twisted pair (utp) cabling. Fiber optics runs a distant second, followed by the two types of coaxial cable, thick and thin. Th...

  • Page 85

    Description 5-5 ethernet the job of a transceiver in chassis design is to provide a connection to a network that has already been established. Once a network has an established repeater in the chassis, the addition of chassis modules which allow ethernet workstations to connect to the chassis may be...

  • Page 86

    Ethernet 5-6 description repeating when ethernet was created, the general philosophy was “one cable, one lan.” signals would be transmitted to every point on a single cable. This transmission means is fine for the multipoint media, like thick and thin coaxial cable, but is useless on a media that yo...

  • Page 87

    Description 5-7 ethernet for each new chassis that is to support an ethernet network through the use of mims, repeating must be supplied anew. So, if one network had outgrown its chassis and was being extended by way of a connection to a second modular chassis, repeating would have to be supplied al...

  • Page 88

    Ethernet 5-8 description repeater rules naturally, there are rules surrounding repeaters, just as there are rules surrounding cabling. A set of guidelines known collectively as the repeater rule make plain the maximum limits of repeaters. The rule is based on the numbers 5-4-3. 5: maximum of five (5...

  • Page 89

    Description 5-9 ethernet figure 5-4. Repeater rule violation furthermore, the number of repeater hops in the longest signal path is five, one in excess of the four allowed by the repeater rule. The network shown in figure 5-4 would not function properly, due to the errors introduced by the violation...

  • Page 90

    Ethernet 5-10 simple ethernet configuration simple ethernet configuration the term “simple” in this definition is used to indicate that the network is configured as a single repeated network and does not incorporate any bridging, routing, switching or other segmentation between stations. All of the ...

  • Page 91

    Simple ethernet configuration 5-11 ethernet to provide the starting point for building the ethernet network, a repeater module must be placed in the chassis. This module will provide repeating functions for the ethernet modules in the chassis that are configured to use the ethernet channel a of the ...

  • Page 92

    Ethernet 5-12 simple ethernet configuration this location utilizes utp cabling with rj45 connectors, narrowing the choices of modules to the tpmim-22 and tpmim-24 . Since there are 63 stations to provide connections for, the chassis utilizes three tpmim-24 ethernet media interface modules, supplying...

  • Page 93

    Simple ethernet configuration 5-13 ethernet modular intelligent chassis the modular intelligent chassis provides the basic platform into which management and networking modules are inserted. It provides the physical interconnection of modules through the backplane bus. It is important to note that m...

  • Page 94

    Ethernet 5-14 simple ethernet configuration media interface modules to provide connections for the physical cabling, media interface modules are needed. The number of media interface modules the network must utilize is dependent upon the number of stations to be connected to the network. Before sele...

  • Page 95: Segmentation

    Segmentation 5-15 ethernet as all of the modules listed in table 5-4, above, are ethernet channel a modules, they are fully interchangeable in configuration terms. A configuration like the example given previously could have utilized three tpmim-34 modules if rj21 connectors were to be used, or incl...

  • Page 96

    Ethernet 5-16 segmentation we may also segment the network logically by geographic location. This makes it easier to troubleshoot and expand existing networks. Geographic segmentation is usually an inferior segmentation solution in comparison with segmentation by related function or access. The incr...

  • Page 97

    Segmentation 5-17 ethernet figure 5-6. Bridges the bridge is considered a node on the network and performs store and forward functions for packets on each network. This contrasts with a repeater which repeats the signal bit by bit from one side of the network to the other. The bridge actually reads ...

  • Page 98

    Ethernet 5-18 segmentation cabletron produces two different types of ethernet bridges; those that are configured to operate within the mmac chassis and those which are standalone external bridges. Cabletron’s main internal bridge module for ethernet networks are the emme family of repeater/bridge/ma...

  • Page 99

    Segmentation 5-19 ethernet figure 5-7. Fddi backbone bridge modules which connect an ethernet network to token ring networks or wide area networks, serial terminals, appletalk networks, and systems network architecture (sna) are also available. One special case of ethernet bridging is the use of bri...

  • Page 100

    Ethernet 5-20 segmentation the table which follows lists the available mmac chassis modules which perform bridging between the ethernet technology and other similar network technologies. Bridging: this indicates what technologies the module bridges. In the case of the etwmim, the module is capable o...

  • Page 101

    Segmentation 5-21 ethernet multichannel ethernet multichannel ethernet is an inventive means of segmenting a network without requiring more than one hub. The flexible network bus of the mmac-fnb models provides three separate ethernet buses, or “channels”: ethernet channel a, ethernet channel b, and...

  • Page 102

    Ethernet 5-22 segmentation these self-repeating mims are called rmims, for repeating media interface modules. As the product descriptions chapter of this networking guide shows, rmims are available in most of the media connection types available for standard ethernet channel a mims. These rmims, how...

  • Page 103

    Segmented ethernet configuration 5-23 ethernet segmented ethernet configuration a “segmented” ethernet is an ethernet network which incorporates a method of filtering or blocking traffic from individual stations or groups of stations. This segmentation can be accomplished through several methods, am...

  • Page 104

    Ethernet 5-24 segmented ethernet configuration design example our hypothetical facility is planning to provide networking for five departments, department a, department b, department x, department y, and the support department. The workgroups have been planned out in advance, and each workgroup requ...

  • Page 105

    Segmented ethernet configuration 5-25 ethernet to keep the various departments separate from unrelated departments and still allow them to transfer information to peripherally related departments when necessary, the multichannel ethernet solution will be utilized. To support the ethernet modules tha...

  • Page 106

    Ethernet 5-26 segmented ethernet configuration beginning with the group identified above as network a, three tpmim-34 modules provide 72 connections to channel a through six rj21 ports (each rj21 connector supports twelve utp station connections through a 110-style distribution box or punchdown bloc...

  • Page 107

    Segmented ethernet configuration 5-27 ethernet modular intelligent chassis the modular chassis provides the basic platform into which management and networking modules are inserted. Ensure that the chassis being utilized provides the flexible network bus (fnb) architecture and shunting backplane. It...

  • Page 108

    Ethernet 5-28 segmented ethernet configuration to provide connections for ethernet stations located on ethernet channel a , media interface modules are needed. The number of media interface modules the network must utilize is dependent upon the number of stations to be connected to the network. Iden...

  • Page 109

    Segmented ethernet configuration 5-29 ethernet repeating media interface modules to provide connections for ethernet stations which will be located on ethernet channels b or c of the backplane, repeating media interface modules are needed. The number of rmims the network must utilize is dependent up...

  • Page 110: Segmentation - Special Cases

    Ethernet 5-30 segmentation - special cases segmentation - special cases port assignment in most ethernets requiring modification, congestion is the problem. Ethernet has a tendency to get sluggish around 40% bandwidth utilization. When you move up to sustained rates of 50 or 60% utilization, the sit...

  • Page 111

    Port assignment configuration 5-31 ethernet port assignment mims, while expensive, give the highest level of multichannel ethernet functionality available for the mmac chassis. If you have 78 users, there is no need to place 48 on channel a and 22 on channel b and the remainder in a half-populated m...

  • Page 112

    Ethernet 5-32 port assignment configuration design example what follows is a configuration for a group of departments which will use port assignment. The design process is a simple matter of determining how many users the chassis will support, providing enough tpxmim modules to supply that number of...

  • Page 113

    Port assignment configuration 5-33 ethernet modular intelligent chassis the modular chassis provides the basic platform into which management and networking modules are inserted. It is important to note that modular power supplies are required for the operation of the hub and the modules within it. ...

  • Page 114: Ethernet Switching

    Ethernet 5-34 ethernet switching ethernet port assignment media interface modules the port assignment modules are used to provide connectivity for end user stations. The number of media interface modules the network must utilize is dependent upon the number of stations to be connected to the network...

  • Page 115: Switching Configurations

    Switching configurations 5-35 ethernet since cabletron systems’ primary ethernet switch module, the esxmim, provides a dedicated 10 mbps ethernet connection between any two stations connected to its ports, it can be useful in environments where a connection between multiple hub locations is needed, ...

  • Page 116

    Ethernet 5-36 switching configurations ethernet switch modules to supply the switching functionality required for the configuration, an ethernet switch module must be added to a modular chassis. Consult the table below to determine which modules may be used to set up the ethernet switching functiona...

  • Page 117

    Switching configurations 5-37 ethernet permutations since ethernet switches perform functions similar to those of bridges, they can be used as replacements for mac layer bridges in several situations. As an example, a facility requires that five ethernet networks, segmented from one another by a bri...

  • Page 118

    Ethernet 5-38 switching configurations the esxmim backbone switch design is essentially the same as the esxmim segment switch configuration described above, with individual, complete chassis taking the place of tprmim modules. One important thing to remember when configuring multiple esxmim modules ...

  • Page 119

    Switching configurations 5-39 ethernet ethernet switch modules to supply the switching functionality required for the configuration, an ethernet switch module must be added to a modular chassis. Consult the table below to determine which modules may be used to set up the ethernet switching functiona...

  • Page 120

    Ethernet 5-40 switching configurations a. The cxrmim and tprmim families support front panel epim slots. B. In the case of the tprmim-36, the epim slot will only be active if one connection normally made through the rj21 ports is disabled. C. Note: all fiber optic mims provide two connectors (transm...

  • Page 121: Chapter 6

    6-1 chapter 6 token ring this chapter examines the token ring network technology in detail and provides step-by-step design instructions for the creation of token ring networks using cabletron systems networking products. Description token ring is a token-based networking technology that provides a ...

  • Page 122

    Token ring 6-2 description unlike ethernet stations, which may transmit at any time, provided that the network is traffic-free at the time the station examines its physical connection to the network, token ring stations may only transmit if they have just received permission from the other stations ...

  • Page 123

    Description 6-3 token ring in figure 6-3, station a is still holding the token. While other stations may want to transmit data, they have not received the token, and must continue to wait their turn. Station c reads the data frame, sends it on to station d, and discards the data frame from memory. F...

  • Page 124

    Token ring 6-4 description fault isolation due to the very orderly fashion in which token ring networks operate, a number of fault location and recovery features can be incorporated into the token ring design. These fault recovery processes can locate a hardware or cable error and eliminate it, hope...

  • Page 125

    Description 6-5 token ring a beacon is a signal that indicates a token ring station considers itself to be having difficulties. Since token ring frames are circulated at a regular order which is set by a controlling station during the process of initializing the ring, a station knows that it should ...

  • Page 126

    Token ring 6-6 description fault recovery the automatic identification of beaconing conditions and fault domains allows a token ring network to attempt to locate the problems of a network and eliminate them without requiring direct human intervention. The following section presents examples of three...

  • Page 127

    Description 6-7 token ring station d, having received eight consecutive beacon frames which identify it as the naun, removes itself from the ring by closing the relay at the mau. Station d then enters a self-testing state, checking the operation of its own interface. Determining that it is not at fa...

  • Page 128

    Token ring 6-8 description figure 6-10. Beacon recovery process if the problem is, indeed, a cable error that is disrupting the flow of data within the ring, the network needs a way to recover in a way that involves bypassing that entire cable. If the cable is a station connection, bypassing the por...

  • Page 129

    Description 6-9 token ring media the token ring technology may use several different types of media for station connections. Just as in other network technologies, the network provides maximum distances for each type of cable used to make a connection. In token ring, however, the type of cabling use...

  • Page 130

    Token ring 6-10 description in order to be certain that you choose the proper modules for connectivity, make sure that you have calculated all the cabling that your network will need and decided on speeds and active or passive status for the ring before you begin purchasing hardware. Connectivity/tr...

  • Page 131

    Description 6-11 token ring cabletron systems has also introduced a series of trmims which connect to the four available token ring backplane channels of the mmac chassis. Where the standard trmims can only attach to token ring 1 of the backplane, the token ring port assignment modules, called trxmi...

  • Page 132

    Token ring 6-12 description token ring network rules token ring networks are available in two types, which are differentiated by the speed at which data is passed from station to station: 4 mbps and 16 mbps. In the first years of its inception, a 1 mbps token ring standard was also available, but it...

  • Page 133: Single Ring Configuration

    Single ring configuration 6-13 token ring single ring configuration the single ring is the basis of token ring networks, and is the point at which all token ring networks begin. A single ring token ring network is one which does not incorporate any segmentation between rings, connecting all token ri...

  • Page 134

    Token ring 6-14 single ring configuration due to the relatively small size of this network, a single token ring has been decided upon for the network. This token ring must operate over the selected cabling and must operate at 16 mbps. As all of the research workstations are performing related tasks,...

  • Page 135

    Single ring configuration 6-15 token ring to continue with the design, we must determine which management module, trmm or trmmim, to use to set up the token ring. Since this network is a completely new design, and does not require the expansion or accommodation of existing equipment, the half-sized ...

  • Page 136

    Token ring 6-16 single ring configuration an examination of the network and a quick comparison with the table of token ring limitations (table 6-1) shows that this network is well within specifications for a passive token ring environment. The maximums allowed for a passive token ring operating at 1...

  • Page 137

    Single ring configuration 6-17 token ring figure 6-12. Example token ring configuration 1 the networking device families used in this network design are the token ring management and token ring lobe connectivity devices. Since there are several different products manufactured by cabletron systems wh...

  • Page 138

    Token ring 6-18 single ring configuration modular intelligent chassis the modular chassis provides the basic platform into which management and networking modules are inserted. The chassis provides the physical interconnection of modules through the backplane bus. It is important to note that modula...

  • Page 139

    Single ring configuration 6-19 token ring token ring media interface modules to provide connections for the physical cabling, media interface modules are needed. The number of media interface modules the network must utilize is dependent upon the number of stations to be connected to the network. Id...

  • Page 140

    Token ring 6-20 single ring configuration extending the ring (ring-in/ring-out) in some cases, a token ring network may require more than one mmac chassis in order to be fully implemented. This may be due to the location of nodes to be added to the ring, or may be necessitated by insufficient availa...

  • Page 141

    Single ring configuration 6-21 token ring brief review of maus the earliest maus were dumb boxes, collections of ports and some internal relays that simply moved the signal along the line and bypassed ports to which no station was attached. The way that these relays, which performed the bypassing op...

  • Page 142: Segmentation

    Token ring 6-22 segmentation ring-in/ring-out ports provide dedicated connections between maus. A token ring signal emerges from a ring-out port and enters a new mau at that new maus ring-in port. The cabling that is used to make these connections is called a trunk cable or ri/ro cable. Ri/ro cable ...

  • Page 143

    Segmentation 6-23 token ring figure 6-14. Token ring segmentation methods the token ring modules which manage and configure the multiple channels of the backplane are the trmm-4 and trmm-2 . These modules are token ring management modules, and are discussed further in the later portions of this chap...

  • Page 144: Multi-Ring Configuration

    Token ring 6-24 multi-ring configuration cabletron systems also produces router modules for the mmac chassis which connects to the token ring backplane bus. The crm family of router modules, developed in conjunction with cisco systems, provide routing functionality for token ring networks with excel...

  • Page 145

    Multi-ring configuration 6-25 token ring the token ring must operate over the selected cabling and must operate at 16 mbps. The chassis from which this network operates is a cabletron systems mmac-m8fnb modular networking chassis. To function, the chassis must be outfitted with the correct modular p...

  • Page 146

    Token ring 6-26 multi-ring configuration to continue with the design, we must determine which management module, trmm or trmmim, to use to set up the token ring. Since this network is a completely new design, and does not require the expansion or accommodation of existing equipment, the half-sized m...

  • Page 147

    Multi-ring configuration 6-27 token ring to provide lobe connections to the 11 token ring stations of the first ring, the mmac chassis needs to incorporate token ring media interface modules, or trmims. These trmims will provide ports for teller station lobe connections between the mmac backplane an...

  • Page 148

    Token ring 6-28 multi-ring configuration in order to create a new ring in the chassis, we need to add a module that will break the single token ring backplane channel which the trmims use into two. The one cabletron systems module which does that is the token ring bridging media interface module, or...

  • Page 149

    Multi-ring configuration 6-29 token ring as we are using the same media and want to keep using the passive token ring products, we have the same choice of modules, the trmim-22 and the trmim-24. Dividing the remaining 64 station connections needed by 24 (the number of ports available on the high-den...

  • Page 150

    Token ring 6-30 multi-ring configuration modular intelligent chassis the modular chassis provides the basic platform into which management and networking modules are inserted. It is important to note that modular power supplies are required for the operation of the hub and the modules within it. The...

  • Page 151

    Multi-ring configuration 6-31 token ring token ring media interface modules to provide connections for the physical cabling, media interface modules are needed. The number of media interface modules the network must utilize is dependent upon the number of stations to be connected to the network. Bef...

  • Page 152

    Token ring 6-32 multi-ring configuration token ring bridge the token ring bridge module segments the token ring bus of the fnb, creating two separate rings. The module then bridges between the two. An available front panel station port provides an external bridge connection in the place of the secon...

  • Page 153

    Multi-ring configuration 6-33 token ring multichannel token ring token ring bridging is an effective way of providing for the addition of users and nodes to an existing or planned network, but the addition of several bridged segments to a chassis with only one token ring backplane bus requires the u...

  • Page 154

    Token ring 6-34 multichannel token ring configuration to accomplish this in the mmac chassis, a multiport bridge or a router such as the crm-3t cisco router module for token ring networks can be added to the chassis and configured with the proper number of routing interfaces. The crm-3t connects to ...

  • Page 155

    Multichannel token ring configuration 6-35 token ring design example this design provides multichannel token ring networking services for an academic research facility. The facility needs to add 75 stations to a newly constructed wing. The main facility already contains two existing token ring netwo...

  • Page 156

    Token ring 6-36 multichannel token ring configuration to provide lobe connections to the 75 token ring stations, the mmac chassis needs to incorporate connectivity modules. To fully utilize the capabilities of multichannel token ring networking, the token ring port assignment media interface modules...

  • Page 157

    Multichannel token ring configuration 6-37 token ring the multichannel token ring design allows the use of ring-in/ring-out (ri/ro) modules that supply ri/ro connections to two separate token ring trunks and allows each set of ri/ro ports to be assigned to one of the four token ring backplane channe...

  • Page 158

    Token ring 6-38 multichannel token ring configuration in this case, we require three routed token ring connections above and beyond the connection of the crm-3t to ring 1 of the chassis backplane. We select one npm-1tr, providing one token ring connection, and one npm-2tr, providing two token ring c...

  • Page 159

    Multichannel token ring configuration 6-39 token ring figure 6-16. Example token ring configuration 3 the networking device families used in this network design are the multichannel token ring management, token ring port assignment, and token ring segmentation devices. Since there are several differ...

  • Page 160

    Token ring 6-40 multichannel token ring configuration modular intelligent chassis the modular chassis provides the basic platform into which management and networking modules are inserted. The modular chassis provides the physical interconnection of modules through the backplane bus. It is important...

  • Page 161

    Multichannel token ring configuration 6-41 token ring token ring port assignment media interface modules to provide connections for the physical cabling, media interface modules are needed. The number of media interface modules the network must utilize is dependent upon the number of stations to be ...

  • Page 162

    Token ring 6-42 multichannel token ring configuration segmentation to connect the multiple backplane token rings of the mmac chassis, some form of segmentation device is required. Lobe connections are made from ports assigned to the individual token rings to the ports of the segmentation device. The...

  • Page 163: Chapter 7

    7-1 chapter 7 fddi this chapter examines the fiber distributed data interface (fddi) network technology in detail and provides step-by-step design instructions for the creation of fddi networks using cabletron systems networking products. Description fiber distributed data interface, or fddi, is a t...

  • Page 164

    Fddi 7-2 description fddi has a number of uses. Currently, fddi is often used as a backbone technology, providing a high-speed connection between concentrators. In this fashion, departments having ethernet or token ring hub-based technologies may be tied together by the fddi network. Often, importan...

  • Page 165

    Description 7-3 fddi the distance limitations to each media type are as follows; these distances are decided by ansi, a standards-making body which has created boundaries within which fddi networks may be designed. Rings and devices fddi is based on the creation of dual counter rotating rings. These...

  • Page 166

    Fddi 7-4 description these hubs, if fddi is being used as an end-user solution, will likely have dual attached concentrators populating them. Dacs provide multiple connections to the ring, much like a multistation access unit (mau) in token ring environments. The dac provides single ring connections...

  • Page 167

    Description 7-5 fddi stations on one resulting ring have no means of accessing the other, and vice versa. In situations where only one or two non-chassis devices are attached to the dual ring, critical failures of the sort described are extremely uncommon, but increases in the number of server devic...

  • Page 168

    Fddi 7-6 description these fddi management modules are called fdmmims, and they are available in a number of configurations. The basic fdmmim supplies the management functionality for other fddi modules in the chassis, and provides one set of a/b ports on the front panel for connection to an fddi du...

  • Page 169: Fddi Backbone Configuration

    Fddi backbone configuration 7-7 fddi bridges the fddi technology can be connected to other networking technologies through bridges. Cabletron systems produces two types of fddi bridges, each of which connects one technology to another. The first type is the fddi brim (bridge/router interface module)...

  • Page 170

    Fddi 7-8 fddi workgroup configuration fddi workgroup configuration design philosophy the design of an fddi workgroup network involves the division of network devices into two basic populations, those stations and devices which are directly connected to the dual counter-rotating fddi ring, and those ...

  • Page 171

    Fddi workgroup configuration 7-9 fddi fdmmims are identified by a numerical suffix which indicates the presence or absence of m ports, and the pmd standard connector types which those ports use. For more information, see table 7-3. For this installation, we select the fdmmim-24, which provides four ...

  • Page 172

    Fddi 7-10 fddi workgroup configuration the other facilities are handled in much the same way: select a chassis, place the proper management module in it, and add concentrators until the user count is met or exceeded. The south building, with 80 stations, will require more station ports than even the...

  • Page 173

    Fddi workgroup configuration 7-11 fddi the last facility requires two mmac-m8fnb chassis with power supplies. These chassis will each contain one fdmmim-24. The first chassis also contains six fdcmim-24 modules, while the second contains one fdcmim-24. These two chassis provide exactly 64 station co...

  • Page 174

    Fddi 7-12 fddi workgroup configuration modular intelligent chassis the modular chassis provides the basic platform into which management and networking modules are inserted. It is important to note that modular power supplies are required for the operation of the hub and the modules within it. The p...

  • Page 175

    Fddi workgroup configuration 7-13 fddi fddi management/bridge module the fddi management/bridge module supervises the fddi backplane channel of the mmac-fnb chassis and provides management, monitoring, and control capabilities to the network manager. In order to add fddi concentrator modules to the ...

  • Page 176

    Fddi 7-14 fddi workgroup configuration fddi concentrator the fddi concentrator provides an access point for fddi stations. The fddi concentrator provides bypassing capabilities for connections to workstations and other devices. This ability to bypass ports does not affect the operation of the dual c...

  • Page 177: Chapter 8

    8-1 chapter 8 expansion - ethernet this chapter deals with the addition of capabilities or user connections to existing network configurations using the mmac family of modular hubs. Simple ethernet simple ethernet networks are those which consist of a single ethernet segment. The simple ethernet con...

  • Page 178

    Expansion - ethernet 8-2 simple ethernet the tpmim-24, providing 24 rj45 ports, is able to support the 20 additional stations that we are planning to add to the network. While we could achieve the same station support through the use of two tpmim-22 modules, the costs for purchasing the two modules ...

  • Page 179

    Simple ethernet 8-3 expansion - ethernet adding segmentation as users are added to a simple ethernet configuration, the utilization of the available bandwidth increases. As was discussed in chapter 5, an ethernet network that sees sufficient traffic to create sustained utilization of the available b...

  • Page 180

    Expansion - ethernet 8-4 simple ethernet the modules produced for these functions are the emme and emm-e6. The emme and emm-e6 provide repeating for ethernet channel a, supply extensive management functions for all ethernet modules in the chassis, and interconnect all three backplane buses using the...

  • Page 181

    Simple ethernet 8-5 expansion - ethernet these reduce the number of rmims we need to consider to two: the tprmim-21 and tprmim-22. As each ethernet channel needs to support 40 users, and the mmac-m8fnb chassis has only four full slots which are still unpopulated, we cannot use the tprmim-21; the tpr...

  • Page 182

    Expansion - ethernet 8-6 simple ethernet in order to make the creation of flexible and capable networks as painless as possible, cabletron systems produces several modules for the mmac chassis which provide bridged connections from the technology of the module to the ethernet channel a backplane bus...

  • Page 183

    Simple ethernet 8-7 expansion - ethernet the fdmmim, by bridging the ethernet traffic to the fddi backplane bus, facilitates the creation of fddi rings within the chassis. Since this fdmmim is creating the point at which ethernet traffic and fddi traffic meet, it is also responsible for managing the...

  • Page 184: Segmented Ethernet

    Expansion - ethernet 8-8 segmented ethernet segmented ethernet a segmented ethernet configuration is one in which a segmentation technology, such as bridging or switching, is used to break one large group of users and end stations into a series of separate networks. These separate ethernet network s...

  • Page 185

    Segmented ethernet 8-9 expansion - ethernet adding users to several segments if you wish to add users to two or more segments in the same chassis, simply follow the procedures for adding users to one segment, as detailed above, but determine the number of modules needed on a segment by segment basis...

  • Page 186

    Expansion - ethernet 8-10 segmented ethernet in cases where a multichannel ethernet network uses an emm-e6 to provide management and bridging functions, there may be a bridge/router interface module (brim) slot available. If this is the case, a set of token ring in/ring out (ri/ro) ports can be conf...

  • Page 187

    Port assignment and virtual lans 8-11 expansion - ethernet port assignment and virtual lans an ethernet port assignment network is a segmented ethernet which supports the connection of individual ports to specific ethernet network segments through software controls. Adding users to any segment addin...

  • Page 188

    Expansion - ethernet 8-12 port assignment and virtual lans.

  • Page 189: Chapter 9

    9-1 chapter 9 expansion - token ring this chapter deals with the addition of capabilities or user connections to existing network configurations using the mmac family of modular hubs. Single ring a network consisting of only one token ring is referred to as a single ring configuration. All the stati...

  • Page 190

    Expansion - token ring 9-2 single ring adding new rings when adding new token rings to a chassis with an existing token ring network, approach the process in the same way as you do the initial configuration of a chassis which incorporates multiple rings. In most cases, chassis containing existing si...

  • Page 191: Multi-Ring

    Multi-ring 9-3 expansion - token ring the addition of fddi or other technologies to any mmac chassis which supports token ring as its main technology currently requires the use of a routing device. Cabletron systems produces a range of routing products for the mmac chassis that can be customized to ...

  • Page 192: Port Assignment

    Expansion - token ring 9-4 port assignment for example, we have an mmac-m8fnb chassis containing two token rings: ring 1, managed by a trmm in the first slot of the chassis, and ring 2, managed by a trbmim in the middle of the chassis. Each ring contains two trmims. We wish to add more stations to r...

  • Page 193

    Port assignment 9-5 expansion - token ring incorporating new technologies the addition of new technologies, such as fddi, to an existing multichannel token ring chassis is performed in the same fashion as the addition of these capabilities to the single token ring network (see above)..

  • Page 194

    Expansion - token ring 9-6 port assignment.

  • Page 195: Chapter 10

    10-1 chapter 10 expansion - fddi this chapter deals with the addition of capabilities or user connections to existing fddi configurations using the mmac family of modular hubs. Fddi workgroups fddi workgroups are made up of concentrators and stations. Concentrators spread fddi signals to groups of i...

  • Page 196

    Expansion - fddi 10-2 fddi workgroups if, for example, we wished to add another five fddi single-attached stations to the first chassis we designed in chapter 7, we would first have to examine the available chassis slots. The current design leaves three slots of the chassis free: the first, half-siz...

  • Page 197

    Fddi workgroups 10-3 expansion - fddi connecting multiple rings in the event that you wish to connect two fddi rings to one another, a segmentation device must be placed between the fddi networks and connected to each. This device can be an external standalone router or bridge or one of cabletron sy...

  • Page 198

    Expansion - fddi 10-4 fddi workgroups.

  • Page 199: Chapter 11

    11-1 chapter 11 product descriptions this chapter includes a series of representations and brief discussions of some cabletron systems mmac-fnb modules. This section of the networking guide provides a series of brief descriptions of several modules which may be used in the design process. This is, b...

  • Page 200: Chassis

    Product descriptions 11-2 chassis chassis mmac-m8fnb: 8-slot networking chassis the mmac-m8fnb is an eight slot intelligent wiring concentrator that allows ethernet, token ring, and fddi technologies to be run simultaneously within one hub. The hub is fully protocol and network technology independen...

  • Page 201

    Chassis 11-3 product descriptions mmac-m5fnb: 5-slot networking chassis the mmac-m5fnb is a five-slot chassis that accommodates one management/repeater module and four media interface modules. All modules, cable connections, fan tray and power supplies are accessible from the front of the chassis fo...

  • Page 202

    Product descriptions 11-4 chassis mmac-m3fnb: 3-slot networking chassis the mmac-m3fnb is an enhanced three-slot mmac, featuring a removable fan tray and removable power supply, both with lanview leds for at-a-glance device status. Powered by a high-output mmac-m3psm power supply, the mmac-m3fnb is ...

  • Page 203: Ethernet

    Ethernet 11-5 product descriptions ethernet emme: ethernet management and bridging module emm-e6: ethernet management and bridging module the emme module is a high performance unit based on the intel 80960 risc (reduced instruction set computer) processor. The emme offers high-level management throu...

  • Page 204

    Product descriptions 11-6 ethernet esxmim: ethernet switch module esxmim-f2: ethernet switch module the esxmim is a 7-port, user-configurable port switching module. The esxmim allows a full 10 mbps dedicated connection to be established out of each configured interface port. The esxmim provides five...

  • Page 205

    Ethernet 11-7 product descriptions tpxmim-20: 10base-t port assignment media interface module tpxmim-22: 10base-t port assignment media interface module the tpxmim-20 is a port assignment module for ethernet networks which allows the configuration of individual 10base-t ports to the three channels o...

  • Page 206

    Product descriptions 11-8 ethernet tpxmim-33: 10base-t port assignment media interface module tpxmim-34: 10base-t port assignment media interface module the tpxmim-33 is a port assignment module for ethernet networks which allows the configuration of individual 10base-t ports to the three channels o...

  • Page 207

    Ethernet 11-9 product descriptions tprmim-20: 10base-t repeating media interface module tprmim-22: 10base-t repeating media interface module the tprmim-20 is a media interface and repeating module for 10base-t ethernet. The tprmim-20 provides 9 ports of rj45 connectivity for end users, as well as pr...

  • Page 208

    Product descriptions 11-10 ethernet tprmim-33: 10base-t repeating media interface module tprmim-36: 10base-t repeating media interface module the tprmim-33 is an integrated ethernet repeater module with 10base-t twisted pair connectivity, specially designed for the cabletron systems mmac-fnb series ...

  • Page 209

    Ethernet 11-11 product descriptions formim22: 10base-f repeating media interface module cxrmim: 10base2 repeating media interface module the formim-22 is a fiber optic media interface and repeating module for the cabletron systems modular hub. It provides twenty-four fiber optic ports for up to twel...

  • Page 210

    Product descriptions 11-12 ethernet irm3: enhanced intelligent repeater module tpmim-22: 10base-t media interface module the irm3 provides snmp management and ieee 802.3 repeating functionality for the ethernet modules in a cabletron systems intelligent chassis. The irm3 module automatically segment...

  • Page 211

    Ethernet 11-13 product descriptions tpmim-24: 10base-t media interface module tpmim-32: 10base-t media interface module the cabletron systems tpmim-24 provides twenty-four ieee 802.3 10base-t connections for ethernet networking over utp cabling using rj45 jacks. This module offers network connectivi...

  • Page 212

    Product descriptions 11-14 ethernet tpmim-34: 10base-t media interface module fomim-2x series: foirl media interface modules the cabletron systems tpmim-34 provides twenty-four ieee 802.3 10base-t connections for ethernet networking over utp cabling. This module offers network connectivity over 25-p...

  • Page 213

    Ethernet 11-15 product descriptions fomim-3x series: foirl media interface modules thn-mim: 10base2 media interface module the fomim-3x series of ethernet fiber optic media interface module for the cabletron systems mmac provide ethernet connectivity for single mode fiber optic cabling. The fomim-3x...

  • Page 214: Token Ring

    Product descriptions 11-16 token ring token ring trmm-2: multichannel token ring management module trmm-4: enhanced multichannel token ring mangement module the trmm-2 is a multiple channel token ring management module for the mmac chassis. The trmm-2 is capable of managing one or two token ring net...

  • Page 215

    Token ring 11-17 product descriptions tdrmim series: token ring dual repeater modules trxmim-2x series: token ring port assignment modules the tdrmim-22a and -42a are part of a series of token ring modules for the mmac-fnb which provide access to multiple backplane rings and the capability of port a...

  • Page 216

    Product descriptions 11-18 token ring trxmim-4x series: token ring port assignment modules trmm: token ring management module the trxmim-4x series of token ring modules provide access to multiple backplane rings and the capability of port assignment, sometimes also referred to as port switching. Des...

  • Page 217

    Token ring 11-19 product descriptions trmmim: token ring management module trbmim: token ring bridge/management module the trmmim token ring management/media interface module extends the management capabilities of the mmac hub. Working in conjunction with other management modules or intelligent repe...

  • Page 218

    Product descriptions 11-20 token ring trmim-2xa series: active token ring media interface modules trmim-4xa series: active token ring media interface modules the trmim-22a and trmim-24a are active token ring media interface modules designed for the mmac. They provide users with 12- and 24-trunk coup...

  • Page 219

    Token ring 11-21 product descriptions trfmim-2xa series: token ring fiber optic media interface module trfmim-3xa series: token ring fiber optic media interface module trfmims are fiber optic token ring concentrator modules for the cabletron systems mmac intelligent hub. Developed to the ieee 802.5j...

  • Page 220

    Product descriptions 11-22 token ring trrmim-at: token ring ring-in/ring-out module trrmim-2at: token ring ring-in/ring-out module the trrmim-at is an ieee 802.5 compliant token ring repeater media interface module which provides ring-in/ring-out ports to any token ring network operating in an mmac ...

  • Page 221

    Token ring 11-23 product descriptions trrmim-4at: token ring ring-in/ring-out module trrmim-f2t: token ring ring-in/ring-out module the trrmim-4at is an ieee 802.5 compliant token ring repeater media interface module which provides ring-in/ring-out ports to any token ring network operating in an mma...

  • Page 222

    Product descriptions 11-24 token ring trrmim-f3t: token ring ring-in/ring-out module the trrmim-f3t is an ieee 802.5 compliant token ring repeater media interface module which provides ring-in/ring-out ports to any token ring network operating in an mmac chassis. The trrmim-f3t features active port ...

  • Page 223: Fddi

    Fddi 11-25 product descriptions fddi fdmmim: fddi management module and ethernet bridge fdmmim-04: fddi management module and ethernet bridge the fdmmim is an intelligent ansi x3t9.5 compliant fddi management module that contains two das ports. This module also performs ethernet-to-fddi bridging, wi...

  • Page 224

    Product descriptions 11-26 fddi fdmmim-30: fddi management module and ethernet bridge fdmmim-24: fddi management module and ethernet bridge the fdmmim-30 is an intelligent ansi x3t9.5 compliant fddi management module that contains two das ports for single mode fiber optic cabling. This module also p...

  • Page 225

    Fddi 11-27 product descriptions fdcmim-04: fddi mmf-pmd concentrator module fdcmim-08: fddi mmf-pmd concentrator module the fdcmim-04 is an fddi concentrator module with four single attached station (sas) ports which support multimode mic terminated fiber optic cable. The fdcmim-04 is an ansi x3t9.5...

  • Page 226

    Product descriptions 11-28 fddi fdcmim-24: fddi tp-pmd concentrator module fdcmim-28: fddi tp-pmd concentrator module the fdcmim-24 is an ansi x3t9.5 compliant fddi concentrator module for use in the mmac hub. It provides four lobe connections for fddi nodes over category 5 unshielded twisted pair c...

  • Page 227

    Fddi 11-29 product descriptions fdcmim-34: fddi smf-pmd concentrator module fdcmim-38: fddi smf-pmd concentrator module the cabletron systems fdcmim-34 provides four m-type concentrator ports over single mode fiber optic cable. These modules are completely managed and controlled through any fdmmim m...

  • Page 228

    Product descriptions 11-30 fddi fdcmim-44: fddi tp-pmd concentrator module fdcmim-48: fddi tp-pmd concentrator module the fdcmim-44 is an ansi x3t9.5 compliant fddi concentrator module for use in the mmac hub. It provides four lobe connections for fddi nodes over shielded twisted pair cabling at dis...

  • Page 229: Miscellaneous/multiprotocol

    Miscellaneous/multiprotocol 11-31 product descriptions miscellaneous/multiprotocol etwmim: ethernet/token ring/wide area bridge module crm-3e: cisco router module with ethernet backplane connection the etwmim provides bridging between token ring and ethernet networks as well as connectivity to remot...

  • Page 230

    Product descriptions 11-32 miscellaneous/multiprotocol crm-3t: cisco router module with token ring backplane connection csmim2-t: tcp/ip terminal server and ethernet bridge the crm-3t is a router specially designed for the mmac that utilizes the main token ring bus of the mmac-fnb chassis. The crm-3...

  • Page 231

    Miscellaneous/multiprotocol 11-33 product descriptions csmim2-lt: dec lat and tcp/ip terminal server and ethernet bridge modmim4: integrated modem server the csmim2-lt is a communications server module that is capable of performing dec lat to ethernet conversion. Modems or other serial attached devi...

  • Page 232

    Product descriptions 11-34 miscellaneous/multiprotocol modext: integrated modem server extention module the modext modem extension module works in conjunction with the modmim-4 to provide additional wide area connectivity from the chassis. Up to twelve integrated modems may be supported by a single ...

  • Page 233: Appendix A

    A-1 appendix a charts & tables this appendix provides a central location for a series of flowcharts and tables that contain useful network design information..

  • Page 234: Network Design Flowcharts

    Charts & tables a-2 network design flowcharts network design flowcharts ethernet network design flowchart no yes select chassis multi-segment? Switched? Esxmim go to esxmim chart irm family select mims emme family port assignment? Select xmims select mims select “b” rmims select “c” rmims done no no...

  • Page 235

    Network design flowcharts a-3 charts & tables esxmim network design flowchart yes no as chassis bridge? Select rmims as work- group switch? Single esxmim? Configure brims single esxmim? Return to no no no yes yes yes from ethernet chart ethernet chart.

  • Page 236

    Charts & tables a-4 network design flowcharts single token ring network design flowchart yes select chassis done no select trmims network within spec? Ri/ro? Select trrmims slot #1 empty? Trmm trmmim network within spec? Use active circuitry? Select active trmims yes yes yes no no no attempt design ...

  • Page 237

    Network design flowcharts a-5 charts & tables segmented token ring network design flowchart yes select chassis done no select trmims network within spec? Ri/ro? Select trrmims slot #1 empty? Trmm trmmim network within spec? Use active circuitry? Select active trmims yes yes yes no no no attempt desi...

  • Page 238

    Charts & tables a-6 network design flowcharts multichannel token ring network design flowchart no done yes select chassis trmm-2/-4 trxmims ri/ro? Tdrmims connect rings in hub? No yes crm-3t add npms.

  • Page 239

    Network design flowcharts a-7 charts & tables fddi backbone network design flowchart select chassis done no yes no no yes yes ethernet network? Fddi stations? Fdmmim fdcmims crm-3t fddi npm brim slot? Brim-f6 fpims.

  • Page 240

    Charts & tables a-8 network design flowcharts fddi workgroup network design select chassis done no yes ethernet network? Fdmmim fdcmims crm-3t fddi npm token ring network? No yes.

  • Page 241: Mmac Design Tables

    Mmac design tables a-9 charts & tables mmac design tables ethernet design tables management/repeating a. Capacity is additive; each chassis has the listed number of full slots in addition to the single, dedicated half slot utilized by management modules (i.E., the mmac-m5fnb has a total of 5 module ...

  • Page 242

    Charts & tables a-10 mmac design tables connectivity a. Note: all fiber optic mims provide two connectors (transmit and receive) for each ethernet connection. The number of connectors given is the maximum number of transmit and receive pairs available on the module. Table a-3. Ethernet mims media ty...

  • Page 243

    Mmac design tables a-11 charts & tables multichannel connectivity ethernet switching a. The cxrmim and tprmim families support front panel epim slots. B. In the case of the tprmim-36, the epim slot will only be active if one connection normally made through the rj21 ports is disabled. C. Note: all f...

  • Page 244

    Charts & tables a-12 mmac design tables port assignment a. All tpxmim modules provide one epim port in addition to the rj45 or rj21 ports on the front panel. B. The tpxmim-34 requires that one station connection of the rj21 telco port be disabled in order to activate the epim connection. Table a-6. ...

  • Page 245

    Mmac design tables a-13 charts & tables token ring design tables management bridging multichannel token ring management a. The trbmim can bridge between two of its available interfaces, the backplane r interface and either of the other two available. Table a-7. Token ring management modules required...

  • Page 246

    Charts & tables a-14 mmac design tables connectivity a. Note: all fiber optic mims provide two connectors (transmit and receive) for each token ring connection. The number of connectors given is the maximum number of transmit and receive pairs available on the module. Table a-10. Token ring mims med...

  • Page 247

    Mmac design tables a-15 charts & tables ring-in/ring-out connectivity token ring port assignment connectivity port assignment ring-in/ring-out connectivity a. All tdrmims provide, in addition to the 12 station ports, 2 sets of fiber optic ri/ro ports (st connectors for multimode fiber optics). Table...

  • Page 248

    Charts & tables a-16 mmac design tables fddi design tables fddi management fddi connectivity a. Fddi fiber optic connections are made using media interface connector (mic) connectors. Unlike st connectors, only one mic-connected fiber optic cable is necessary to make one station connection. Table a-...

  • Page 249

    Networking standards and limitations a-17 charts & tables networking standards and limitations ethernet distance limitations general rules table a-16. Ethernet standard distance limitations media max distance thick coax 500m thin coax 185m standard aui 50m office aui 16.5m utp 100m fiber optics (mul...

  • Page 250

    Charts & tables a-18 networking standards and limitations token ring distance limitations a. Ibm type 6 cable is recommended for use as jumper cabling only, and should not be used for facility cabling installations. Table a-18. Token ring maximums media circuitry cable type max # of stations max lob...

  • Page 251

    Networking standards and limitations a-19 charts & tables ring-in/ring-out limitations general rules table a-19. Ring-in/ring-out distances media max distance (4 mbps) max distance (16 mbps) shielded twisted pair 770m 346m unshielded twisted pair category 3/4 200m 100m category 5 250m 120m fiber opt...

  • Page 252

    Charts & tables a-20 networking standards and limitations fddi fddi distance limitations general rules a. Category 5 utp cabling only b. Ibm type 1 stp cabling only table 11-1. Fddi distance limitations media pmd standard max link distance fiber optics (multimode) mmf-pmd 2 km fiber optics (single m...

  • Page 253: Glossa

    Gl-1 glossa this glossary provides brief descriptions of some of the recurrent terms in the main text, as well as related terms used in discussions of the relevant networking discussions. These descriptions are not intended to be comprehensive discussions of the subject matter. For further clarifica...

  • Page 254

    Attenuation to card gl-2 attenuation loss of signal power (measured in decibels) due to transmission through a cable. Attenuation is dependent on the type, manufacture and installation quality of cabling, and is expressed in units of loss per length, most often db/m. Aui attachment unit interface. A...

  • Page 255

    Glossary gl-3 channel to crosstalk channel a portion of a backplane bus which is specifically partitioned off for the transmission of one type of network data. Chassis see modular chassis. Client a workstation or node which obtains services from a server device located on the network. Client-server ...

  • Page 256

    Csma/cd to dual attached gl-4 csma/cd carrier sense multiple access with collision detection. Csma/cd is the basis for the operation of ethernet networks. Csma/cd is the method by which stations monitor the network, determine when to transmit data, and what to do if they sense a collision or other e...

  • Page 257

    Glossary gl-5 dual homing to fnb dual homing a station connection method for fddi which connects a device’s a/b ports to the m ports of two separate dual-attached concentrator devices, providing fault-tolerance. Eeprom electronic erasable programmable read-only memory. Encryption a security process ...

  • Page 258

    Frame to interface gl-6 frame a group of bits that form a discrete block of information. Frames contain network control information or data. The size and composition of a frame is determined by the network protocol being used. Frmaes are typically generated by operations at the data link layer (laye...

  • Page 259

    Glossary gl-7 internet to mau internet a world-wide network which provides access through a vast chain of private and public lans. Interoperability the capacity to function in conjunction with other devices. Used primarily to indicate the ability of different vendors’ networking products to work tog...

  • Page 260

    Mbps to nvram gl-8 mbps megabits per second. Mbps indicates the number of groups of 1000 bits of data that are being transmitted through an operating network. Mbps can be roughly assessed as a measure of the operational “speed” of the network. Media physical cabling or other method of interconnectio...

  • Page 261

    Glossary gl-9 octet to redundant octet a numerical value made up of eight binary places (bits). Octets can represent decimal numbers from zero (0000 0000) to 255 (1111 1111). Oid object identifier. Osi model open standards interconnect. A model of the way in which network communications should proce...

  • Page 262

    Relay to simm gl-10 relay an electrical switch which opens and closes in response to the application of voltage or current. Repeater a network device consisting of a receiver and transmitter which is used to regenerate a network signal to increase the distance it may traverse. Ring-in/ring-out token...

  • Page 263

    Glossary gl-11 single attached to subnet mask single attached connected to an fddi network through a single cable which does not provide for auto-wrap functions. Single mode a type of fiber optics in which light travels in one predefined mode, or wavelength. Signals in single mode fiber optics are t...

  • Page 264

    Switch to utp gl-12 switch a network device which connects two or more separate network segments and allows traffic to be passed between them when necessary. A switch determines if a packet should be blocked or transmitted based on the destination address contained in that packet. Tcp transmission c...

  • Page 265: Index

    Index-1 index numerics 10base2 2-9 10base5 2-8 10base-t 2-10 80/20 rule 4-8 a a/b ports 7-3 ansi 2-14 assistance 1-4 atm forum 2-14 aui 2-10 auto-wrap 6-8 b backbones 3-4, 5-18 collapsed 4-15 definition 4-13 device 4-16 distributed 4-14 planning 4-13 selection 4-17 beacon definition 6-5 recovery 6-6...

  • Page 266

    Index-2 f fault domain 6-5 fddi basics 3-15 bridge 7-7 concentrator 7-5 description 7-1 to 7-7 devices 7-3 to 7-6 discussion 3-17 discussion 3-17 media 7-2 fiber optics description 2-11 multimode 2-12 single mode 2-12 filter 5-17 fnb 4-27 frames fddi 3-17 token ring 3-11 h help 1-4 i ibm-type 2-11 i...

  • Page 267

    Index-3 p packet 3-2 phantom current 6-21 pmd 7-2 port assignment ethernet 5-30 token ring 6-33 port switching see port assignment propagation delay 5-2, 5-16 r related documents 1-4 repeater rule ethernet 5-8 repeaters 5-6 repeating media interface modules (rmims) 5-7, 5-22 ring-in/ring-out 6-22 ro...

  • Page 268

    Index-4 draft manual - for internal use only.