CoreBuilder 5000 Token Ring Media Modules User Guide TM (R) http://www.3com.com/ Document Number 17-00513-4 Published May 1997 3Com Corporation 5400 Bayfront Plaza Santa Clara, California 95052-8145 Copyright (c) 3Com Corporation, 1997. All rights reserved. No part of this documentation may be reproduced in any form or by any means, or used to make any derivative work (such as translation, transformation, or adaptation) without permission from 3Com Corporation. 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Other brand and product names may be registered trademarks or trademarks of their respective holders. iv CONTENTS HOW TO USE THIS GUIDE Audience 1 Structure of This Guide 2 Document Conventions 3 Related Documents 3 3Com Documents 4 Reference Documents 4 1 INTRODUCTION CoreBuilder 5000 Token Ring Module Features 1-1 Port Switching 1-1 Module Switching 1-2 Automatic Ring Speed Detection 1-2 Active Port Retiming and Jitter Reduction 1-2 Reducing Internal (CoreBuilder 5000) Jitter 1-3 Reducing External (Non-CoreBuilder 5000) Jitter 1-3 Automatic Beacon Recovery 1-4 Address-to-Port Mapping 1-4 CoreBuilder 5000 Token Ring Modules 1-4 Active Per-Port Switching Media Module (6218M-ATPP) 1-5 Active Per-Module Switching Media Module (6218M-ATP) 1-7 Ring Mapping on the APM When Trunks Are Configured 1-8 Passive Media Module (6220M-TP) 1-10 Dual Fiber Repeater Module (6210M-DFR) 1-12 Jitter Attenuator Card (6200D-JA) 1-14 Where to Go From Here 1-14 2 DESIGNING AND EXPANDING THE NETWORK Building a CoreBuilder 5000 Token Ring Network 2-2 Additional Configuration Information 2-3 Determining the Maximum Number of Stations on a Ring 2-4 Selecting Appropriate Cable Lengths 2-4 Calculating Cable Lengths (Copper Wiring) 2-4 Additional Cable and Lobe Length Recommendations 2-5 Maximum Attenuation 2-5 Signal to NEXT Ratio 2-5 Transmitter Variation 2-5 Temperature 2-6 Cabling Standards 2-6 3Com Lobe Cable Length Recommendations 2-6 Lobe Cabling Requirements 2-7 STP Lobe Cables 2-7 UTP/Levels 3, 4, and 5 Lobe Cables 2-8 120 ohm (Screened Twisted Pair) Lobe Cables 2-8 Connection Hardware 2-9 3Com Trunk Cable Recommendations 2-9 Copper Trunk Cables 2-9 Fiber Trunk Cables 2-9 Determining Fiber Cable Lengths Using Alternate Fiber Diameters 2-10 Using Media Filters 2-11 Configuration Examples 2-12 Traditional Backbone Ring 2-12 Collapsed Backbone Configuration 2-14 Ring 1 Description 2-16 Ring 2 Description 2-16 Ring 3 Description 2-16 Devices Internetworked in the Master Hub 2-17 Single Extended Ring Configuration 2-17 Where to Go From Here 2-18 vi 3 INSTALLING THE MODULE Precautionary Procedures 3-1 Quick Installation 3-2 Unpacking Procedures 3-3 Module Overview 3-4 Using Network Monitor Cards 3-4 Setting the DIP Switches 3-5 Setting the Lobe/Trunk Jumper (6218M-ATPP and 6218M-ATP) Installing Optional Daughter Cards 3-10 Installing a Token Ring Network Monitor Card 3-10 Installing a Token Ring Jitter Attenuator Card 3-12 Installing the Module 3-14 Copper Lobe Port Connections 3-17 Copper Ring-In/Ring-Out Trunk Connections 3-17 Fiber Ring-In/Ring-Out Connections 3-18 Where to Go From Here 3-18 4 CONFIGURING THE 3-9 MODULE Configuration Overview 4-1 Before You Begin 4-2 Configuring the Modules 4-2 Setting Network Ring Speed 4-3 Selecting a Network 4-4 Assigning Modules 4-4 Assigning Ports 4-4 Enabling Ports 4-5 Enabling Beacon Recovery 4-5 Setting Beacon Threshold 4-6 Enabling Static Ring Switching 4-6 Enabling Mismatch Resolution (Passive and Active Per-Module Media Modules Only) 4-7 Moving Rings from Module-Level to Hub-Level 4-8 Setting Port Alert Filters 4-9 Enabling Speed Detect (Passive Module Only) 4-10 Setting Module Speed Threshold (Passive Module Only) 4-11 Configuring Trunks 4-11 Trunk Enable 4-12 vii Trunk Network Selection 4-12 Trunk Compatibility Mode 4-12 Saving the Configuration 4-13 Showing Module Configurations 4-13 Using the Show Module Command 4-14 Using the Show Port Command 4-15 Monitoring the Front Panel 4-16 LED and Network Verification 4-17 Using the CoreBuilder 5000 Controller Module to Verify LED Operation 4-17 Using the DMM to Verify Network Connections 4-18 Where to Go From Here 4-18 5 TROUBLESHOOTING General Troubleshooting Tips 5-2 Troubleshooting Using the Status LEDs 5-3 Troubleshooting Using the Module Status LED 5-3 Troubleshooting Using the Port Status LEDs 5-4 Troubleshooting Ring Problems 5-5 Problems Adding a New Station to an Operating Ring Intermittent Errors on an Operating Ring 5-6 Ring Failures 5-6 Trunk Interoperability Problems 5-7 Technical Assistance 5-8 Where to Go From Here 5-8 A 5-5 SPECIFICATIONS Token Ring Active Per-Port Switching Media Module Specifications A-1 Token Ring Active Per-Module Switching Media Module Specifications A-2 Token Ring Dual Fiber Repeater Module Specifications A-2 Token Ring Passive Media Module Specifications A-3 Token Ring Jitter Attenuator Card Specifications A-3 Twisted Pair (Copper) Connector Pinouts A-4 Active Per-Port and Active Per-Module Media Module Ring-In Port Adapter Pinout A-5 viii B TECHNICAL SUPPORT Online Technical Services B-1 World Wide Web Site B-2 3Com Bulletin Board Service B-2 Access by Analog Modem B-2 Access by Digital Modem B-2 3ComFacts Automated Fax Service B-3 3ComForum on CompuServe Online Service Support From Your Network Supplier B-4 Support From 3Com Corporation B-5 Returning Products for Repair B-6 Accessing the 3Com MIB B-6 Contacting 3Com Technical Publications B-7 B-3 INDEX 3COM CORPORATION LIMITED WARRANTY ix FIGURES 1-1 1-2 1-3 1-4 2-1 2-2 2-3 3-1 3-2 3-3 3-4 3-5 3-6 4-1 4-2 A-1 A-2 CoreBuilder 5000 Active Per-Port Switching Media Module 1-6 CoreBuilder 5000 Active Per-Module Switching Media Module 1-9 CoreBuilder 5000 Token Ring Passive Media Module 1-11 CoreBuilder 5000 Token Ring Dual Fiber Repeater Module 1-13 Traditional Backbone Configuration 2-13 Collapsed Backbone Configuration 2-15 Single Extended Ring Configuration 2-18 CoreBuilder 5000 Token Ring Module DIP Switch Locations 3-6 Active Per-Port Module and Active Per-Module Switching Module Jumper Setting 3-9 Location of CoreBuilder 5000 Token Ring Network Monitor Cards 3-11 Installing a CoreBuilder 5000 Token Ring Jitter Attenuator Card 3-13 Installing a Media Module 3-15 Opened and Closed Module Ejectors 3-16 CoreBuilder 5000 Token Ring Network Mode 4-9 Media Module Faceplates 4-16 RJ-45 Connector Pinouts A-4 6200ADT-RI Ring-In Wire Diagram A-5 xi TABLES 2-1 2-2 2-3 2-4 2-5 2-6 2-7 2-8 2-9 2-10 2-11 3-1 3-2 3-3 4-1 4-2 4-3 5-1 5-2 Building a CoreBuilder 5000 Token Ring Network 2-2 Maximum Station Counts 2-4 Maximum Lobe Lengths (in Meters) 2-7 STP Network Cable Specifications 2-7 UTP Level 3 Cable Specifications 2-8 UTP Level 4 Cable Specifications 2-8 UTP Level 5 Cable Specifications 2-8 120 ohm Cable Specifications 2-9 Multimode Fiber Specifications 2-10 Alternate Fiber Diameter Distances 2-10 Fiber Optical Budget 2-10 Procedures for Completing Installation 3-2 Network Select DIP Switch Settings 3-7 DIP Switch Setting, Switches 5 through 8 3-8 CoreBuilder 5000 Compatibility Settings 4-12 ONline Compatibility Settings 4-13 Media Module LED Interpretation 4-17 Troubleshooting Using the Module Status LED 5-3 Troubleshooting Using the Port Status LEDs 5-4 xiii HOW TO USE THIS GUIDE This guide explains how to install and operate the 3Com CoreBuilder 5000 Token Ring Media Modules. This guide includes information on managing the module using a CoreBuilder 5000 Distributed Management Module (DMM). It also describes the Jitter Attenuator Card, which helps stabilize trunk (Ring-In/Ring-Out) connections to non-CoreBuilder 5000 rings. Before installing or using the Token Ring Media Modules, read Chapters 1, 2, and 3 of this guide for basic installation and operating instructions. Audience This guide is intended for the following people at your site: Network manager or administrator Hardware installer 2 HOW TO USE THIS GUIDE Structure of This Guide This guide contains the following chapters: Chapter 1, Introduction - Introduces the functions and features of CoreBuilder 5000 Token Ring Modules. Chapter 2, Designing and Expanding the Network - Shows possible network configurations using the CoreBuilder 5000 Integrated System Hub and the CoreBuilder 5000 Token Ring Modules. Chapter 3, Installing the Module - Provides illustrated procedures for installing CoreBuilder 5000 Token Ring Media Modules into the CoreBuilder 5000 Integrated System Hub. Chapter 4, Configuring the Module - Describes the network management commands used to configure the modules. Also shows front panel LEDs and dip switches on the module. Chapter 5, Troubleshooting - Provides help in isolating and correcting problems that may arise when installing or operating CoreBuilder 5000 Token Ring Media Modules. Appendix A, Specifications - Provides electrical, environmental, and mechanical specifications for the module. In addition, this appendix provides information on 50-pin Telco-type connectors, RJ-45 connectors, and twisted pair cables. Appendix B, Technical Support - Lists the various methods for contacting the 3Com(R) technical support organization and for accessing other product support services. Index Document Conventions Document Conventions 3 The following document conventions are used in this manual : Convention Indicates Example Courier text User input In the Agent Information Form, enter MIS in the New Contact field. System output After pressing the Apply button, the system displays the message Transmitting data. Bold command string Path names Before you begin, read the readme.txt file located in /usr/snm/agents. Text in angled brackets Italic text in braces User-substituted identifiers In the command above, substitute <rem_name> with the name of the remote machine.Use the following command to show port details: SHOW PORT {slot.all} VERBOSE Capitalized text in plain Keyboard entry by brackets the user Type your password and press [ENTER]. Italics Ensure that you press the Apply button after you add the new search parameters. Icon Related Documents Text emphasis, document titles Notice Type Alerts you to... Information note Important features or instructions Caution Risk of personal safety, system damage, or loss of data Warning Risk of severe personal injury This section provides information on supporting documentation, including: 3Com Documents Reference Documents 4 HOW TO USE THIS GUIDE 3Com Documents The following documents provide additional information on 3Com products: CoreBuilder 5000 Integrated System Hub Installation and Operation Guide - Provides information on the installation, operation, and configuration of the CoreBuilder 5000 Integrated System Hub. This guide also describes the principal features of the CoreBuilder 5000 Fault-Tolerant Controller Module. Distributed Management Module User Guide - Provides information on the CoreBuilder 5000 Distributed Management Module's operation, installation, and configuration. This guide also describes the software commands associated with the Distributed Management Module. Distributed Management Module Commands Guide - Describes each management command by providing detailed information on the command's format, use, and description. Token Ring Media Module Quick Reference Cards - Provide basic configuration and monitoring information for individual CoreBuilder 5000 Token Ring module types. For a complete list of 3Com documents, contact your 3Com representative. Reference Documents The following documents supply related background information: Case, J., Fedor, M., Scoffstall, M., and J. Davin, The Simple Network Management Protocol, RFC 1157, University of Tennessee at Knoxville, Performance Systems International and the MIT Laboratory for Computer Science, May 1990. Rose, M., and K. McCloghrie, Structure and Identification of Management Information for TCP/IP-based Internets, RFC 1155, Performance Systems International and Hughes LAN Systems, May 1990. 1 INTRODUCTION This chapter describes the 3Com CoreBuilderTM 5000 Token Ring Media Modules. For more information on the 3Com(R) CoreBuilder 5000 Integrated System Hub, refer to the CoreBuilder 5000 Integrated System Hub Installation and Operation Guide. The chapter contains the following sections: CoreBuilder 5000 Token Ring Module Features Port Switching CoreBuilder 5000 Token Ring Module Features CoreBuilder 5000 Token Ring Modules This section describes the following CoreBuilder 5000 Token Ring Media Module features: Port Switching Module Switching Automatic Ring Speed Detection Active Port Retiming and Jitter Reduction Automatic Beacon Recovery Address-to-Port Mapping CoreBuilder 5000 Token Ring port switching modules support per-port switching to any combination of: 10 backplane (hub-wide) Token Rings 11 isolated (module-level) rings 1-2 INTRODUCTION Ports on the same module can be part of as many as 11 different rings. Using per-port switching, you can move ports (and therefore users) from ring to ring using a console attached to the hub management module or SNMP-based network management system. Internal management features such as automatic ring speed detection ensure that newly-inserted ports do not disrupt ring operation. Module Switching CoreBuilder 5000 Token Ring per-module switching modules can be switched on a per-module basis to any of 10 CoreBuilder 5000 backplane rings or to one isolated ring. Internal management features such as automatic ring speed detection ensure that newly-inserted modules do not disrupt ring operation. Automatic Ring Speed Detection CoreBuilder 5000 Token Ring Media Modules provide automatic ring speed detection. Automatic Ring Speed Detection is a feature that prevents a station from entering an active ring if the station is configured for a speed other than the active ring's speed. This wrong-speed detection is implemented per port, and works automatically with speed sensing Token Ring Adapter cards. For example, if you try to attach a station configured at 4 Mbps to an active ring configured at 16 Mbps, the CoreBuilder 5000 Token Ring circuitry prevents the station from entering the ring before the station's wrong speed causes a beaconing interruption. Active Port Retiming and Jitter Reduction CoreBuilder 5000 Token Ring ports and modules actively retime and regenerate incoming signals, effectively increasing achievable link distances. Active retiming - Allows greater cable lengths over lower-grade cabling, and helps ensure reliable connections. For example, CoreBuilder 5000 Active Port Retiming Token Ring supports a 16 Mbps Token Ring over Level 3 UTP cable at distances of up to 100 meters. Jitter attenuation - Is a feature that increases both the achievable link distances and maximum number of stations. CoreBuilder 5000 Token Ring Module Features 1-3 Jitter is the tendency of signalling on Token Ring networks to grow increasingly out-of-phase as the network size increases. CoreBuilder 5000 Token Ring Media Modules remedy jitter problems by: Reducing Internal (CoreBuilder 5000) Jitter Reducing External (Non-CoreBuilder 5000) Jitter Reducing Internal (CoreBuilder 5000) Jitter To minimize jitter and increase the number of stations allowed on each ring, each CoreBuilder 5000 Token Ring active port incorporates Dual Phase-Locked Loop (DPLL) circuitry. Dual PLL minimizes accumulated jitter and phase slope on the ring, and increases the number of attached stations to 250 (190 at 4 Mbps) on each ring. To reduce jitter, DPLL uses a two-pronged approach: An optimized, wide-band PLL tracks the incoming signal even in the presence of jitter, thus allowing more margin for jitter sources. A narrow-band PLL removes all fluctuations in the recovered clock and provides a stable source to retime and retransmit the signal. Reducing External (Non-CoreBuilder 5000) Jitter In addition to port-level DPLLs, CoreBuilder 5000 Token Ring Media Modules support optional Jitter Attenuator daughter cards. Daughter cards reduce jitter accumulated in external, non-CoreBuilder 5000 rings, even if the rings are built from other vendor's products. A combination of port-level DPLLs and Jitter Attenuator daughter cards allows you to use Level 3 UTP lobe cabling to configure the following ring (using active ports): 250 stations 16 Mbps ring speed 100 meter lobes A major feature of reduced jitter is reliability. A network that can support 250 stations, under worst case conditions, is assured to be extremely robust and reliable when configured with 50, 75, or 125 stations. 1-4 INTRODUCTION Automatic Beacon Recovery CoreBuilder 5000 Token Rings Media Modules are equipped with: Automatic, hardware-based beacon recovery on each module. Beacon Recovery allows the modules to remove beaconing stations from both backplane (hub-wide) and isolated (module-level) rings. Beacon recovery software and the CoreBuilder 5000 Beacon Recovery ASIC, which aids in the removal of beaconing stations. Beacon recovery functions even in the absence of a management module in the hub. Address-to-Port Mapping CoreBuilder 5000 Token Ring Modules CoreBuilder 5000 Token Ring Media Modules provide accurate, hardware-based address-to-port mapping, capable of mapping multiple stations per port, even for networks that incorporate fan-out devices and MAC-less stations (for example, network analyzers). This section describes the following modules: Active Per-Port Switching Media Module (6218M-ATPP) Active Per-Module Switching Media Module (6218M-ATP) Passive Media Module (6220M-TP) Dual Fiber Repeater Module (6210M-DFR) Jitter Attenuator Card (6200D-JA) CoreBuilder 5000 Token Ring Modules Active Per-Port Switching Media Module (6218M-ATPP) 1-5 The CoreBuilder 5000 Token Ring Active Per-Port Switching (ATPP) Media Module is a single-slot module that supports 18 active retiming lobe ports, all with port-switching capability. The module offers the following features: Switchable ports 17 and 18 provide fully-repeated Ring-In/Ring-Out ports for connection to external rings When configuring ports 17 and 18 as trunks, cable adapter 6200ADT-RI must be connected on the port #18. Active retiming on all media ports Simultaneous shielded and unshielded twisted-pair cabling support Simultaneous 4 and 16 Mbps Token Ring networks, when switched to the appropriate ring speed Can be switched on a per-port basis to any of 10 CoreBuilder 5000 backplane rings or 11 isolated rings Accepts one optional Jitter Attenuation Card, for use with the Ring-In/Ring-Out ports when connecting to a non-CoreBuilder 5000 RI/RO Accepts a Token Ring Network Monitor Card (TR-NMC) Address-to-port mapping, including multi-station ports (fan outs) and MAC-less stations Module-level, hardware-based beacon recovery IEEE 802.5 compliant IEEE 802.5c trunk support Per-port jitter attenuation Fan-out support for up to eight devices per port Automatic ring speed detection INTRODUCTION Figure 1-1 illustrates the CoreBuilder 5000 Token Ring Active Per-Port Switching Media Module. MOD/STA JA RIRO 1-6 1 4 7 10 13 16 LED panel Actively-retimed lobe ports Ports 17 and 18 configurable as Ring-In/Ring-Out ports 18 / /R 17 R 1 O Figure 1-1 CoreBuilder 5000 Active Per-Port Switching Media Module CoreBuilder 5000 Token Ring Modules Active Per-Module Switching Media Module (6218M-ATP) 1-7 The CoreBuilder 5000 Token Ring Active Per-Module Switching Media Module is a single-slot module that supports 18 active retiming lobe ports. The module offers the following features: Switchable ports 17 and 18 provide fully-repeated Ring-In/Ring-Out ports for connection to external rings When configuring ports 17 and 18 as trunks, cable adapter 6200ADT-RI must be connected on the port #18. Active retiming on all media ports Simultaneous shielded and unshielded twisted-pair cabling support Support for either 4 or 16 Mbps Token Ring networks Can be switched on a per-module basis to any of ten CoreBuilder 5000 backplane rings or to the one isolated ring Accepts one optional Jitter Attenuation Card, for use with the optional Ring-In/Ring-Out ports when connecting to non-CoreBuilder 5000 RI/RO Accepts a Token Ring Network Monitor Card (TR-NMC) Address-to-port mapping, including multi-station ports (fan-outs) and MAC-less stations When an Active Per-Module Media Module (APM), in trunk mode only, has fan-out devices attached in the network, the address map information is not accurate for ports below the fan-out device. The address map information for the other modules is accurate. If a fan-out device is attached to an APM and the trunks on the APM are enabled, 3Com recommends that you insert the fan-out device at the highest numbered active port. Module-level, hardware-based beacon recovery IEEE 802.5 compliant IEEE 802.5c trunk support Per-port jitter attenuation Fan-out support for up to eight devices per port Automatic ring speed detection 1-8 INTRODUCTION Ring Mapping on the APM When Trunks Are Configured Mismatch Resolution does not run when APM trunks are enabled, which may result in an incorrect ring map. When trunks are enabled, the number of entries reported on the APM is the number of ports that have phantom. Although only the active ports are listed, there may be a mismatch in the port to station mapping when fan-out or MAC-less devices are present. When a fanout or MAC-less device is attached to an APM with trunks enabled, the address map information may be inaccurate for ports below the fanout or MAC-less device. The address map information for the other modules on the same network is accurate. If you use fanout or MAC-less devices on an APM with trunks enabled, 3Com recommends that you insert the fanout and MAC-less device at the highest numbered active port. CoreBuilder 5000 Token Ring Modules 1-9 MOD/STA JA RIRO Figure 1-2 illustrates the CoreBuilder 5000 Token Ring Active Per-Module Switching Media Module. 1 4 7 10 13 16 LED panel Actively-retimed lobe ports Ports 17 and 18 configurable as Ring-In/Ring-Out ports 18 / /R 17 R 1 O Figure 1-2 CoreBuilder 5000 Active Per-Module Switching Media Module 1-10 INTRODUCTION Passive Media Module (6220M-TP) The CoreBuilder 5000 Token Ring Passive Media Module is a single-slot module that provides 20 lobe ports per module, or up to 320 users per hub, with as many as 250 users on the same network ring. The module has the following features: Delivers a high-density passive media solution for connecting devices to Token Ring networks. Provides connections using shielded or unshielded twisted-pair cabling (using RJ-45 connectors) on any individual module. You cannot, however, mix both wiring types on the same module. Supports a variety of twisted pair cabling, UTP categories 4 or 5. Supports either 4 or 16 Mbps Token Ring networks on a per-module basis. Supports fan-out devices so that you can perform address to port mapping of up to eight end stations per port. Can be switched on a per-module basis to any of ten CoreBuilder 5000 backplane rings or to the one isolated ring. Accepts a Token Ring Network Monitor Card (TR-NMC). Has built-in jitter-attenuation circuitry for module level retiming. Automatic ring speed detection. Address-to-port mapping, including multi-station ports (fan outs) and MAC-less stations. Module-level, hardware-based beacon recovery. CoreBuilder 5000 Token Ring Modules 1-11 MOD/STA 1 2 Figure 1-3 illustrates the CoreBuilder 5000 Token Ring Passive Media Module. LED panel 3 6 9 12 15 18 Passive media ports Figure 1-3 CoreBuilder 5000 Token Ring Passive Media Module 1-12 INTRODUCTION Dual Fiber Repeater Module (6210M-DFR) The CoreBuilder 5000 Token Ring Dual Fiber Repeater (DFR) Module is a 10-port, single-slot module that supports two sets of fully repeated fiber Ring-In/Ring-Out ports. Using the CoreBuilder 5000 hub in a collapsed backbone, each DFR Module can collapse two rings from remote locations into the central hub. The module's features are: Simultaneous 4 and 16 Mbps Token Ring networks, when switched to the appropriate ring speed 10 RJ-45 actively-retimed port-switching ports for connecting devices to Token Ring networks using shielded or unshielded twisted-pair cabling (or both types simultaneously) Industry-standard ST fiber connectors, which support multimode 62.5/125 m fiber at distances up to 2 km Up to 11 individual rings per module, and can switch ports among any of the 11 isolated or 10 backplane rings Accepts two Jitter Attenuation Cards and a Token Ring Network Monitor Card (TR-NMC) Address-to-port mapping, including multi-station ports (fan-outs) and MAC-less stations Module-level, hardware-based beacon recovery IEEE 802.5 compliant IEEE 802.5c trunk support Fan-out support for up to eight devices per port Automatic ring speed detection CoreBuilder 5000 Token Ring Modules Figure 1-4 illustrates the CoreBuilder 5000 Token Ring Dual Fiber Repeater Module. MODULE STATUS 1 3 5 7 9 RI1 RI2 JA1 2 4 6 8 10 RO1 RO2 JA2 LED panel 1 2 3 Actively-retimed lobe ports 4 5 6 7 8 9 10 R X RI-1 TX R X RO-1 Fiber Ring-In/Ring-Out ports TX R X RI-2 T X RX RO-2 T X Figure 1-4 CoreBuilder 5000 Token Ring Dual Fiber Repeater Module 1-13 1-14 INTRODUCTION Jitter Attenuator Card (6200D-JA) The optional Jitter Attenuator Card filters excessive jitter that may accumulate in non-CoreBuilder 5000 equipment, protecting the CoreBuilder 5000 networks from unwanted jitter build-up. It is supported by all CoreBuilder 5000 modules that have Ring-In/Ring-Out connection capability (Refer to the section titled Active Port Retiming and Jitter Reduction on page 1-2 for more information). The card has the following features: Ensures the integrity of CoreBuilder 5000 Token Ring networks by eliminating jitter from non-CoreBuilder 5000 device signals. Allows the connection to other non-CoreBuilder 5000 rings where jitter, or Phase Slope, may have built up to unacceptable levels. This ensures error-free operation when interfacing with the CoreBuilder 5000 hub. Connects to any CoreBuilder 5000 module supporting RI/RO trunk ports Configures automatically using media module-resident software to the appropriate Ring-In or Ring-Out receive trunk, dependent on Trunk "wrap" or "unwrap" mode Use the Jitter Attenuator Card only with modules that make direct RI/RO connections to non-CoreBuilder 5000 equipment. This saves you the expense of the jitter attenuation circuitry when connecting to other CoreBuilder 5000 rings. Where to Go From Here Now that you are familiar with the features and architecture of CoreBuilder 5000 Token Ring Media Modules, evaluate the environment in which you plan to use this module. Chapter 2, Designing and Expanding the Network, lists cabling considerations and configuration examples specific to the CoreBuilder 5000 Token Ring Media Modules in a CoreBuilder 5000 Integrated System Hub. 2 DESIGNING NETWORK AND EXPANDING THE This chapter describes the process for designing a CoreBuilderTM 5000-based Token Ring network. Use the information in this chapter as a guide to plan your network. This chapter contains the following sections: Building a CoreBuilder 5000 Token Ring Network Determining the Maximum Number of Stations on a Ring Selecting Appropriate Cable Lengths Using Media Filters Configuration Examples 2-2 DESIGNING AND EXPANDING THE NETWORK Building a CoreBuilder 5000 Token Ring Network Table 2-1 lists general rules for building a CoreBuilder 5000 Token Ring network. Table 2-1 Building a CoreBuilder 5000 Token Ring Network Rule Definition Recommendation/Notes 1 Understand your network. Understand the network you are developing before you begin. Understand all network components and know their physical location. If the number of stations on a ring approaches 250 (190 with 4Mbps UTP), consider creating multiple smaller rings connected with bridges and routers instead of building one large ring. 2 Determine the number of stations per ring and each location. Have a written plan of your configuration, including the number of stations and their location. The maximum number of stations allowed in a single 16 Mbps ring is 250. Four Mbps rings are allowed up to 190 stations. Consider using significantly fewer than the maximum number of stations per ring. Although the physical medium supports the specified station count, networks may experience bandwidth problems if too many stations are added to a single ring. Maximum station count means you can add stations up to the maximum limit without fear of physical layer problems disrupting the ring. 3 Determine the ring speed of your network. The number of stations per ring and the type of cable used help determine the speed of the network. Some configurations are more reliable on high grade cabling. Use 4 Mbps configuration rules if you do not plan to upgrade to a 16 Mbps network. Otherwise, use 16 Mbps rules. When designing a network, remember that individual ports on port-switching modules can operate at either 4 and 16 Mbps, as long as the speed matches the speed of the ring. This automatic speed detect feature allows you to change a station ring speed if you upgrade the adapter card, without having to change the physical wire. Building a CoreBuilder 5000 Token Ring Network Table 2-1 2-3 Building a CoreBuilder 5000 Token Ring Network (continued) Rule Definition Recommendation/Notes 4 Determine the maximum lobe and trunk cable lengths you want to use. This guide lists the recommended maximum lobe and trunk cable lengths in Selecting Appropriate Cable Lengths on page 2-4. Keep in mind that in some cases the required lobe lengths may dictate the wiring type required. 5 Decide upon the best type of cable for your environment. Use a cable type with the best possible transmission properties in new installations (STP, or UTP Level 4 or greater). Level 3 is supported on active modules. 6 Select the appropriate adapter cards and media filters when needed. CoreBuilder 5000 Token Ring products are compatible with 802.5-compliant devices. Not all media filters are the same. 3Com offers an 802.5 optimized and fully-compliant media filter. 7 Determine whether you need Jitter Attenuator Cards. Use Jitter Attenuator cards on Media Modules when attaching Ring In/Ring Outs to non-CoreBuilder 5000 networks (ONline System Concentrator and IBM 8230 CAU). The cards also make ring performance more reliable. 8 Install and verify the cable. Token Ring networks do not over-emphasize a robust cabling plant because all signals pass through each cable in the network. A single bad cable can disrupt or destroy the performance of the entire Token Ring network. Once the cabling is installed, verify the cable at both ends (hub and station) with patch cables installed. Verification at this level can expose problems in the cabling plant that were not apparent when the cable was initially installed and tested in the wall. Additional Configuration Information This information will assist you when configuring trunks on Token Ring media modules. Unreliable network information may display when the following three configuration conditions are met: You have two media modules with their trunks configured on the same network. The modules are connected by the backplane. 2-4 DESIGNING AND EXPANDING THE NETWORK The modules are connected to each other by one of the RI/RO trunk pairs. When you try to ping stations on the two media modules, unreliable network information displays. You may not be able to pass data between the two modules. Avoid this type of configuration. Determining the Maximum Number of Stations on a Ring Selecting Appropriate Cable Lengths Calculating Cable Lengths (Copper Wiring) If you have followed the lobe and trunk cabling guidelines in this chapter, 3Com(R) CoreBuilder 5000 Token Ring Modules support the maximum number of stations listed in Table 2-2. Table 2-2 Maximum Station Counts Ring Speed/Cable Type Active Ports Passive Ports 4 Mbps UTP/STP 190 250 16 Mbps UTP/STP 250 250 This section describes the cable lengths for CoreBuilder 5000 Token Ring Media Modules. It is divided into the following sections: Calculating Cable Lengths (Copper Wiring) Cabling Standards 3Com Lobe Cable Length Recommendations Lobe Cabling Requirements 3Com Trunk Cable Recommendations Determining Fiber Cable Lengths Using Alternate Fiber Diameters This section describes considerations and assumptions you should use for determining the cable lengths recommended in this chapter. Considerations include: Maximum Attenuation Signal to NEXT Ratio Transmitter Variation Temperature Selecting Appropriate Cable Lengths 2-5 Additional Cable and Lobe Length Recommendations All cable lengths are adjusted to provide adequate margin in real-time configurations. The lengths also take into account the increased tolerance to NEXT-related jitter. The recommended lobe lengths consider any patch panels or workstation attachment cables in the lobe. Ensure all cable in a particular path is the same type (UTP or STP) to meet the cable recommendations in this chapter. Maximum Attenuation To comply with the 802.5 standard, ensure that the channel does not exceed a maximum attenuation of 19 dB in any configuration. The channel is the transmission path from the medium interface connector (MIC) of one transmitter to the MIC of the next receiver in line. 3Com uses 19 dB as the maximum channel attenuation when computing cable lengths. Signal to NEXT Ratio To reduce effective channel attenuation, maintain an adequate Signal to Near-End Crosstalk (NEXT) Ratio (SNR). Use the SNR to calculate recommended lobe lengths (both active and passive) as suggested by the current IEEE 802.5 draft standards: 13.5 dB for STP links 12.0 dB for UTP links Transmitter Variation To calculate the recommended lengths, use transmitter variation as suggested by the latest IEEE 802.5 draft standards: 3.5 dB for STP links 2.0 dB for UTP links 2-6 DESIGNING AND EXPANDING THE NETWORK Temperature Use the following recommended cable types for the temperatures specified: UTP for 20 C STP for 25 C Also, adjust cable lengths downward for elevated temperatures. Cabling Standards The following sources recommend that all horizontal copper cable runs (lobes) be limited in length to 100 meters: Commercial building cabling standards, both domestic and international (ANSI/EIA/TIA 568, TR-41 Working Groups, and International Standard IEC/ISO 11801, Generic Cabling for Information Technology) Planning and Installation Guide Customer Premises Cabling to Support Attachment of ISO 88025 Token Ring Stations 3Com supports these cabling practices and recommends customers follow these guidelines. Cable lengths listed in this chapter are valid only with cables as defined by either the above-mentioned documents or by EIA/TIA Bulletin: Technical Systems Bulletin, Additional Cable Specifications for Unshielded Twisted Pair Cables, TSB-36, November 1991. 3Com Lobe Cable Length Recommendations The horizontal lobe distance is the length of the furthest node from the module. Use this information as follows: 1 Determine the longest lobe cable that can be included in your network. 2 Verify that all additional lobe cables are shorter than the maximum length. Table 2-3 identifies maximum lobe lengths for 4 Mbps and 16 Mbps networks using STP and UTP cables in a single closet configurations. The lobe cable lengths in this table support the number of stations listed in Table 2-2. Selecting Appropriate Cable Lengths Table 2-3 2-7 Maximum Lobe Lengths (in Meters) Ring Speed STP Active (A)/ Passive (P) A * UTP Level 5 UTP Level 4 UTP Level 3 P A P A P A P 4 Mbps 800 400 425 200 425 200 250 125 16 Mbps 400 200 225 100 210 100 100 N/A * With the exception of the 190 stations, which should be reduced if there are more than 25 stations with lobe lengths approaching 800 meters. Lobe Cabling Requirements The section describes recommended twisted pair lobe cable requirements for the following cable types: STP Lobe Cables UTP/Levels 3, 4, and 5 Lobe Cables 120 ohm (Screened Twisted Pair) Lobe Cables STP Lobe Cables Use STP cable that meets the requirements defined in SP-2840: Commercial Building Telecommunications Cabling Standard (ANSI/TIA/EIA). To maintain the performance of a robust network design, use wiring that meets or exceeds the specifications defined in Table 2-4. Table 2-4 STP Network Cable Specifications Characteristic 4 Mbps 16 Mbps Impedance 135 to 165 ohm 135 to165 ohm Attenuation (dB/100 m) 2.2 dB 4.5 dB Crosstalk (dB maximum) -58 dB -40 dB The attenuation listed in Table 2-4 applies to cables at a temperature of 25 Celsius. The use of cables in an environment with temperatures higher than 25 Celsius may result in decreased distances. Refer to the Planning and Installation Guide for Customer Premises Cabling to Support Attachment of ISO 8802-5 Token Ring Stations for more details. 2-8 DESIGNING AND EXPANDING THE NETWORK UTP/Levels 3, 4, and 5 Lobe Cables To maintain maximum performance of your network design, use wiring that meets or exceeds the specifications defined in Tables 2-5, 2-6, and 2-7. For additional information on UTP cable specifications, refer to the EIA/TIA Bulletin: Technical Systems Bulletin, Additional Cable Specifications for Unshielded Twisted Pair Cables, TSB-36, November 1991, Electronic Industries Association. Table 2-5 UTP Level 3 Cable Specifications Characteristics 4 Mbps 16 Mbps Impedance 90 to 110 ohms 90 to 110 ohms Attenuation (dB/100 m) 5.6 dB 13.1 dB Crosstalk (dB maximum) -32 dB -23 dB Table 2-6 UTP Level 4 Cable Specifications Characteristics 4 Mbps 16 Mbps Impedance 90 to 110 ohms 90 to 110 ohms Attenuation (dB/100 m) 4.3 dB 8.9 dB Crosstalk (dB maximum) -47 dB -38 dB Table 2-7 UTP Level 5 Cable Specifications Characteristics 4 Mbps 16 Mbps Impedance 90 to 110 ohms 90 to 110 ohms Attenuation (dB/100 m) 4.3 dB 8.2 dB Crosstalk (dB maximum) -53 dB -44 dB 120 ohm (Screened Twisted Pair) Lobe Cables 3Com supports 120 ohm cable, often called screened twisted pair, using cable lengths recommended for Level 4 UTP cabling. When using 120 ohm wire, use only 120 ohm patch cables with 120 ohm "in the wall" wiring. To maintain maximum performance of your network design when using the 120 ohm cable, make sure the cable meets the requirements in Table 2-8. Selecting Appropriate Cable Lengths Table 2-8 2-9 120 ohm Cable Specifications Characteristics 4 Mbps 16 Mbps Impedance 120 ohms 120 ohms Attenuation (dB/100 m) 3.5 dB 6.2 dB NEXT Attenuation, max 46 dB 38 dB Connection Hardware The performance of installed cable only meets the specifications listed when your connection hardware level is greater than or equal to the level of the installed cable. Connector hardware is specified in SP-2840: Commercial Building Telecommunications Cabling Standard (ANSI/TIA/EIA) and EIA/TIA TSB-40. 3Com Trunk Cable Recommendations CoreBuilder 5000 Token Ring products have either copper or fiber trunk (Ring-In/Ring-Out) ports. This section lists trunk cabling requirements for: Copper Trunk Cables Fiber Trunk Cables Copper Trunk Cables Connect copper trunk ports using Unshielded Twisted Pair (UTP) 3, 4, or 5 and Shielded Twisted Pair (STP). The distances are the same as the active lobe port distances. (Refer to Table 2-3 for trunk cable lengths.) However, for the highest integrity, use only STP and UTP 5 for connecting trunks. When configuring ports 17 and 18 as trunks, cable adapter 6200ADT-RI must be connected on port #18. Fiber Trunk Cables Ensure that fiber-optic trunk cables are: Multimode Grade-index optical fiber waveguide with nominal 62.5/125 M core/cladding diameter 2-10 DESIGNING AND EXPANDING THE NETWORK The fiber must comply with the specifications listed in Table 2-9 and with ANSI/EIA/TIA - 492AAAA. You can use cables of this type up to 2 km long. Table 2-9 Determining Fiber Cable Lengths Using Alternate Fiber Diameters Multimode Fiber Specifications Wavelength Maximum Attenuation Maximum into Transmission Capacity (MHz-km) 850 3.75 dB/km 160 Table 2-10 contains distance estimates that may not have been tested. Use the alternate fiber diameter distances listed to help you determine the fiber cable length associated with the use of alternate fibers. The result is based on 62.5/125 (the defacto cable that you use). By specification, the maximum distance for any fiber length is 2 kilometers. Table 2-10 Alternate Fiber Diameter Distances Alternate Diameter Fiber Size Average Transmit Power (dBm) Receiver Power Range (dBm) Minimum Link Loss Required (db) 50/125 -16.4 to -22.4 -12 to -28 0 62.5/125 -13 to -19 -12 to -28 0 -28* 85/125 -10.7 to 16.7 -12 to 100/140 - 8.8 to -14.8 -12 to -28* 1.3 4 * If you use 85/125 or 100/140 as your alternate fiber diameter distance, you can overdrive the receiver. Table 2-11 Fiber Optical Budget 50 Micron Core 85 Micron Core 100 Micron Core 920 meters 3.44 km 5.3 km Using Media Filters Using Media Filters 2-11 3Com Token Ring products do not require media filters. You may, however, need to use a media filter when attaching a DTE device, only when the installed cable's impedance does not match the Network Interface Card's (NIC) impedance. For example, you may try to use UTP wiring (100 ohm impedance) with NIC cards that have STP (150 ohm) output. If you have a NIC that requires a media filter, we recommend the 3Com media filter (5201F-UTP), which exceeds IEEE specifications for return loss, and provides robust performance with most NICs. Using other media filters may cause excessive attenuation or other loss, thereby reducing achievable link distances and reducing maximum station counts. 2-12 DESIGNING AND EXPANDING THE NETWORK Configuration Examples Traditional Backbone Ring This section describes typical applications in using CoreBuilder 5000 Token Ring modules. The following example configurations are described: Traditional Backbone Ring Collapsed Backbone Configuration Single Extended Ring Configuration The traditional backbone ring configuration assumes: 1 Each floor or department in an organization forms its own Token Ring LAN. 2 A bridge connects each LAN to a backbone ring, thereby allowing communication between users on different LANs. 3 The backbone ring extends through the riser of the building through the CoreBuilder 5000 Dual Fiber Repeater Modules. In the traditional backbone ring scenario, the CoreBuilder 5000 Dual Fiber Repeater Modules are interconnected through their Ring-In/Ring-Out ports. The following conditions exist: All Repeater Modules are assigned to the same backplane ring or are set to isolated mode. For each separate LAN, the Token Ring Bridges and Token Ring Media Modules (in this case, CoreBuilder 5000 Token Ring Passive Media Modules) are assigned to the same backplane ring. Each Token Ring Bridge connects to a Repeater Module through a connection from the bridge to one of the 10-lobe ports on the Repeater Module. Configuration Examples Figure 2-1 illustrates a backbone ring connecting three CoreBuilder 5000 hubs on different floors of a building. A A A A Bridge AAAA AA AA AA AA AA Backbone Bridge AA A AA AA Bridge Figure 2-1 Traditional Backbone Configuration 2-13 2-14 DESIGNING AND EXPANDING THE NETWORK Collapsed Backbone Configuration Networks that use a collapsed backbone result in: Reduced costs Enhanced security Controlled access to networking equipment Centralize major networking devices (such as file servers, protocol analyzers, bridges, and routers) in one controlled area such as a computer room Figure 2-2 illustrates the following configuration: 1 A master CoreBuilder 5000 hub is located in the central computer room on floor 1 of a 3-story building. 2 The CoreBuilder 5000 hubs on floors 2 and 3 both contain CoreBuilder 5000 Dual Fiber Repeater modules that connect through the vertical riser of the building to two CoreBuilder 5000 Dual Fiber Repeater modules in the master concentrator. 3 Traffic sent by the departmental LANs travels directly to the master hub. 4 A single Dual Fiber Repeater module extends both Ring 1 and Ring 2 to the master hub. Ring 1 and Ring 2 users exist on each Active Per-Port Switching Module in the third floor hub. Configuration Examples 2-15 A description of each ring assignment follows Figure 2-2. TR-NMC TR-NMC TR-NMC TR-NMC T-JIT = Installed Daughter Cards A A A A AA AA AAA Ring 1 A Floor 3 AA AA AAA AA AA T-JIT TR-NMC Ring 2 AA AAA AA AAA Ring 3 AA AAAA Floor 2 IBM 8230 TR-NMC Monitoring Ring 4 Ring 4 Minicomputer Floor 1 AA AA Bridge/Router Figure 2-2 Ring 1 Collapsed Backbone Configuration AA AA AAA AA A Ring 2 Servers Ring 3 2-16 DESIGNING AND EXPANDING THE NETWORK This section describes the ring assignments illustrated in Figure 2-2. Ring 1 Description The end nodes on Ring 1 attach to Active Per Port Switching Modules in the floor 3 hub. The following is a list of assignments for Ring 1: Each port on Ring 1 is assigned to the CoreBuilder 5000 hub's backplane Token Ring 1 network. A set of Ring-In/Ring-Out ports, also assigned to backplane Token Ring 1, extends the ring through the vertical riser to the master hub on floor 1. The attached Ring-In/Ring-Out ports on the Dual Fiber Repeater Module on floor 1 are assigned to the same backplane network as the server for Ring 1. This connects the Ring 1 file server to the Ring 1 end nodes. Ring 2 Description Ring 2 works the same way Ring 1 works. Ring 2 uses the second set of Ring-In/Ring-Out ports on the Dual Fiber Repeater Module on the third floor to extend the ring down the vertical riser. The Ring 2 file server is attached to the same Active Per Port Switching Media Module as the Ring 1 file server. This is possible because you can switch any port on either the Dual Fiber Repeater Module or the Active Per-Port Switching Module to any of 10 backplane Token Ring networks. Ring 3 Description Ring 3 works the same way as Rings 1 and 2. The second set of Ring-In/Ring-Out ports on the Dual Fiber Repeater Module on floor 2 attach an IBM 8230 Multistation Access Unit (MAU) to the ring. A Token Ring Jitter Attenuator Card installed on the Dual Fiber Repeater Module ensures compatibility with the external 8230 MAU. Configuration Examples 2-17 Devices Internetworked in the Master Hub In the master (floor 1) hub, port-switching lobe ports on the Dual Fiber Repeater Module connect four of the hub's backplane Token Ring networks to an external bridge/router. The external bridge/router: Routes traffic between the three networks that service file servers and the nodes on the building's floors Communicates across the backplane to a fourth Token Ring network that attaches to a minicomputer (for example, a database server) Because all of the ports in this internetwork are port-switchable, the internetwork is easily organized into four subnetworks, which are connected by routing traffic through a multiport external bridge/router. Single Extended Ring Configuration The single extended ring configuration: Connects users on distant points of a network to one extended local area network. Accommodates organizations that have users dispersed in different areas of a building and want them configured into one Token Ring LAN. Dual Fiber Repeater Modules provide main trunk connectivity between distant CoreBuilder 5000 hubs. Figure 2-3 shows an extended ring that spans several hubs in a building. The Token Ring Passive Media Modules in each hub on floor 1 and floor 2 are configured on the same backplane ring (in this case, all modules are assigned to Ring 1). Assign the Dual Fiber Repeater and Passive Media Modules to the same backplane ring in both hubs so that a single data path is used for data transmission. 2-18 DESIGNING AND EXPANDING THE NETWORK AA AA AA AA AA AA AAA AAA AAA AAA A A A A A A Floor 3 AAA AA AAA AA AA AAA AAA AA A A AA AAAA AAA Floor 2 AA AA AA AAAA A A AA Floor 1 Figure 2-3 Where to Go From Here Single Extended Ring Configuration Once you complete this chapter, proceed to Chapter 3. Chapter 3, Installing the Module, describes installation procedures for CoreBuilder 5000 Token Ring Media Modules and optional daughter cards and how to set DIP switches. 3 INSTALLING THE MODULE This chapter describes the installation of CoreBuilderTM 5000 Token Ring Media Modules. For your convenience, a module reference card is included with each module. These cards list management commands, LED indicators, and other module information. Store this card in the CoreBuilder 5000 Integrated System Hub binder in the Reference Card area. This chapter contains the following topics: Precautionary Procedures Quick Installation Unpacking Procedures Module Overview Setting the DIP Switches Installing Optional Daughter Cards Installing the Module CAUTION: Read the precautionary procedures in this chapter before unpacking the module. Precautionary Procedures Electrostatic discharge (ESD) can damage static-sensitive devices on circuit boards. Follow these precautions when you handle the module. CAUTION: Do not remove the board from its anti-static shielding bag until you are ready to inspect or install it. CAUTION: Handle the board by the faceplate only. 3-2 INSTALLING THE M ODULE Use one of the following proper grounding techniques when you install the module: Quick Installation Use a foot strap and grounded mat or wearing a grounded static discharge wrist strap. Touch the grounded rack or other source of ground just before you handle the module. Table 3-1 outlines the steps necessary to complete the installation of your module. If you are familiar with installing CoreBuilder 5000 modules, use this table as a checklist. Otherwise, consult the remainder of this chapter. Table 3-1 Procedures for Completing Installation Step Procedure Section Title 1 Verify that your network complies with the basic rules for network design. Chapter 2, Designing and Expanding the Network 2 Unpack the module. Chapter 3, Unpacking Procedures 3 Configure the DIP switch settings. If you have a network management module installed in the hub, configure the module using the management commands described in Chapter 4. Chapter 3, Setting the DIP Switches or Chapter 4, Configuring the Module 4 Set the lobe/trunk selection jumper (Model Numbers 6218M-ATPP and 6218M-ATP). Chapter 3, Setting the Lobe/Trunk Jumper (6218M-ATPP and 6218M-ATP) 5 Install Token Ring Network Monitor Cards or Jitter Attenuator Cards as needed. Chapter 3, Installing Optional Daughter Cards 6 Enter the SHOW POWER*command at the command line of the terminal. This command displays current power requirements for the hub. Chapter 3, Installing the Module 7 Insert the module into an open slot in the Chapter 3, Installing the hub and fasten the ejectors and tighten the Module faceplate screws fingertight. Use proper ESD precautionary procedures when handling the module. Unpacking Procedures Table 3-1 3-3 Procedures for Completing Installation (continued) Step Procedure Section Title 8 Establish connections from the module to devices using the appropriate connectors and cabling. Chapter 2, Designing and Expanding the Network, describes cabling limitations. Chapter 3, Installing the Module 9 Verify LED status for normal operation. Chapter 4, LED and Network Verification * Refer to the CoreBuilder 5000 Integrated System Hub Installation and Operation Guide for more details on hub power requirements. For information about potential problems, consult the troubleshooting techniques in Chapter 5. Unpacking Procedures To unpack your module: 1 Verify that the module is the model you ordered by checking the model number listed on the side of the shipping carton. Note that the product model number printed on the shipping box differs from the model number on the product. The model number on the shipping box contains the prefix '3C9'. 2 Remove the module, in its antistatic bag, from the shipping carton. 3 Remove the module from the antistatic shielding bag and inspect it for damage. Always handle the module by the faceplate, being careful not to touch the components. If the module appears to be damaged, return it to the antistatic shielding bag, repack it in the shipping carton, and contact your local supplier. Keep the shipping carton and antistatic shielding bag in which your module was shipped for future storage or shipment. Record the serial number of your module. The Hub Planning Charts, located in the CoreBuilder 5000 reference binder, are provided for this purpose. 3-4 INSTALLING THE M ODULE Module Overview Token Ring Media Modules are either port-switching or module-switching. These features: Enable you to assign either a port or the entire module to a backplane (hub-wide) or isolated (module-level) network. Provide you with greater flexibility in both workgroup creation and module configuration. Using Network Monitor Cards The CoreBuilder 5000 scalable network management architecture enables users to add a CoreBuilder 5000 Token Ring Network Monitor Card (TR NMC) to the module. This card enables users to achieve SNMP network connectivity and gather network statistics for any of the CoreBuilder 5000 Token Ring backplane networks, as well as for any individual isolated (module-level) network. Once you attach the card to a module, you must assign the TR NMC card to the network you want to have inband connections to or gather statistics on. On module-switched modules, the TR NMC is automatically assigned to the same network that the media card is assigned to. You can install the TR NMC card on Token Ring Media Modules only. The Distributed Management Module (DMM) does not provide installation slots for these cards. Setting the DIP Switches Setting the DIP Switches 3-5 Each Token Ring Media Module has an 8-position DIP switch. All of the DIP switch settings on the module are ignored if an appropriate CoreBuilder 5000 network management module (DMM 2.0 or later, for example) is already installed in the hub (or if you configure the module to configure from NVRAM). For this reason, use network management commands, rather than the DIP switch, to configure the module. Use the DIP switches to: Select a network channel for each port on the module (the default is TR1). Choose the configuration approach used in hubs, either: Non-volatile RAM configuration (software configuration) or DIP Segment selection (DIP-specified module configuration). The default is configuration from NVRAM. When the module configures from its NVRAM settings, the module ignores all hardware DIP settings and uses its last-stored software configuration. Set whether or not the module uses a Speed Detect algorithm (Passive Module only. Other modules detect speed automatically). The default is disable. Set a ring speed for the module. The default is 16 Mbps. It is not possible to use the DIP switches on Token Ring Media Modules to assign individual ports to different networks. If you do not have a CoreBuilder 5000 network management module installed in your hub, your hub's configuration defaults to the DIP switch settings on the module. The DIP switch 5 setting may instruct the module to configure from NVRAM. You must set ports 17 and 18 with a jumper. If you are using a management module and do not plan to use the DIP configuration command, skip setting the DIP switches and go to the section titled "Installing the Module" in this chapter. Figure 3-1 provides an illustration of the switch location on each Token Ring Media Module. INSTALLING THE M ODULE ON OFF DIP switch Active Per-Port Switching Module SW1 sw2 sw3 sw4 sw5 sw6 sw7 sw8 3-6 Dual Fiber Repeater Module DIP switch ON OFF SW1 sw2 sw3 sw4 sw5 sw6 sw7 sw8 Passive Module Figure 3-1 Active Per-Module Switching Module CoreBuilder 5000 Token Ring Module DIP Switch Locations Setting the DIP Switches 3-7 Table 3-2 and Table 3-3 describe the DIP switch settings as follows: Table 3-2 describes the switches used for selecting a default network connection. Switches 1 through 4 enable users to configure all ports for one of the backplane segments (token_ring_1 through token_ring_10) or as a module-level ring (isolated). Table 3-3 describes the remaining DIP settings. A complete definition of each DIP switch function appears in Chapter 4. Table 3-2 Network Select DIP Switch Settings Switch Settings* Network Selection Switch 1 Switch 2 Switch 3 Switch 4 1 (default) ON OFF OFF OFF 2 OFF ON OFF OFF 3 ON ON OFF OFF 4 OFF OFF ON OFF 5 ON OFF ON OFF 6 OFF ON ON OFF 7 ON ON ON OFF 8 OFF OFF OFF ON 9 ON OFF OFF ON 10 OFF ON OFF ON isolated* OFF OFF OFF OFF * Any combination of settings that does not match a specific backplane network causes the module to be isolated. 3-8 INSTALLING THE M ODULE Table 3-3 DIP Switch Setting, Switches 5 through 8 Switch Number Definition 5 ON configures modules from NVRAM. OFF configures the module from DIP settings. By default, Switch 5 is set to ON. 6 ON disables the Passive Media Module's speed detection algorithm. Not Used by other Token Ring Media Modules. The default is ON. 7 Not Used 8 ON sets the ring speed to 4 Mbps. OFF sets the ring speed to 16 Mbps. Default is 16 Mbps. When a module is first installed, the hub checks for configuration settings in the management module. The hub checks for configuration settings stored in NVRAM. If, however, there are no configuration settings in NVRAM, or DIP Switch 5 is set to DIP-switch controlled configuration and the DMM command SET DEVICE DIP_CONFIG is set to ENABLE, the hub checks the DIP switches for configuration information. Setting the Lobe/Trunk Jumper (6218M-ATPP and 6218M-ATP) Setting the Lobe/Trunk Jumper (6218M-ATPP and 6218M-ATP) 3-9 On-board jumpers determine whether ports 17 and 18 on the module are lobe ports or Ring-In/Ring-Out ports. Setting the jumper to the: Left - Selects Ring-In/Ring-Out Right - Selects lobe ports Use pliers or a screwdriver to carefully pry off the jumper. Ports 17 and 18 do not function when you remove the jumper entirely. When configuring ports 17 and 18 as trunks, cable adapter 6200ADT-RI must be connected on the port #18. Jumper block JP3 JP4 JP5 JP6 JP7 RIRO LOBE Figure 3-2 Active Per-Port Module and Active Per-Module Switching Module Jumper Setting 3-10 INSTALLING THE M ODULE Installing Optional Daughter Cards Installing a Token Ring Network Monitor Card CoreBuilder 5000 Token Ring Media Modules support two types of optional daughter cards: Token Ring Network Monitor Cards - Provide the management system with network connectivity and monitor network statistics Token Ring Jitter Attenuator - Removes jitter coming into the CoreBuilder 5000 hub. To install a TR NMC on a CoreBuilder 5000 Token Ring Media Module (Figure 3-3): 1 Match the TR NMC 50-pin connector to the corresponding connector on the host CoreBuilder 5000 Token Ring Media Module. Make sure that the screws align with the holes on the standoffs on the media module. 2 Seat the NMC connector onto the media module connector. 3 Secure the NMC to the media module. Tighten the screws down into the standoffs opposite the connector shown in Figure 3-3. Do not over-tighten the screws. Figure 3-3 illustrates the location of Network Monitor Cards. The location of the Token Ring Monitor Card is relative to the position of the TR NMC 50-pin connector on the Token Ring Module. Installing Optional Daughter Cards 3-11 Connector Active Per-Port Switching Module Network Monitor Card Orientation Dual Fiber Repeater Module Connector ON OFF SW1 sw2 sw3 sw4 sw5 sw6 sw7 sw8 Passive Module Figure 3-3 Active Per-Module Switching Module Location of CoreBuilder 5000 Token Ring Network Monitor Cards 3-12 INSTALLING THE M ODULE Installing a Token Ring Jitter Attenuator Card Only use the Jitter Attenuator Card with modules that make direct RI/RO connections to non-CoreBuilder 5000 equipment. Each media module is capable of carrying a Jitter Attenuator card for each set of Ring In/Ring Out ports: Dual Fiber Repeater Module - Supports two jitter attenuator cards Active Per-Port Media and Active Per-Module Media Module - Support one card Designed with a 30-pin connector, the Jitter Attenuator Card is easily user-installable, and cannot inadvertently be placed on the Token Ring Network Monitor Card connectors. To install a Jitter Attenuator Card on a CoreBuilder 5000 Token Ring Media Module: 1 Match the card's connector pins to the corresponding pins on the host CoreBuilder 5000 Token Ring Media Module. Make sure that the standoffs align with the holes on the card. 2 Seat the card's connector onto the module's connector. 3 Secure the card to the media module by tightening the two screws on each end of the board (see Figure 3-4). Be careful not to over-tighten. CAUTION: The Passive Media Module is shipped with a factory-installed Jitter Attenuator Card. Do not remove this card. The module does not function without it. Figure 3-4 shows the typical orientation of a Jitter Attenuator Card in relation to the socket and standoffs on CoreBuilder 5000 Token Ring Modules. Figure 3-4 illustrates the location of a second Jitter Attenuator Card on the Dual Fiber Repeater Module. 3-13 ON Standoffs Standoffs Connector Active Per-Port Switching Module Connector Jitter Attenuator Card Orientation (relative to the standoffs and connector) ON SW1 sw2 sw3 sw4 sw5 sw6 sw7 sw8 OFF Installing Optional Daughter Cards Dual Fiber Repeater Module Standoffs Connector OFF SW1 sw2 sw3 sw4 sw5 sw6 sw7 sw8 Standoffs Connector Passive Module Figure 3-4 Active Per-Module Switching Module Installing a CoreBuilder 5000 Token Ring Jitter Attenuator Card 3-14 INSTALLING THE M ODULE Installing the Module You do not need to power off the CoreBuilder 5000 Integrated System Hub to install or remove media modules. You can insert the module while the hub is operating (this is called a hot swap). To install a media module: 1 Properly ground yourself prior to handling the media module. For example, attach a static wrist guard to yourself or touch a grounded static mat prior to handling them media module. 2 Configure the media module as follows: To install the media module in a managed hub (DMM Version 2.0 or later), go to step 3 to complete the installation. To configure the appropriate settings, go to Chapter 4, Configuring the Module. To insert the media module in an unmanaged hub, configure the DIP switch settings on the module to the desired settings (refer to "Setting the DIP Switches" earlier in this chapter) and go to step 4. 3 Determine if the hub has enough power for the new module by entering the SHOW POWER BUDGET command. Refer to Appendix A, Specifications, for detailed information on the power for each watt type. Refer to the Distributed Management Module Commands Guide for information on the SHOW POWER BUDGET command. 4 Locate an open slot in the hub. To expose a slot for the module, remove the blank panel on the hub. Installing the Module 3-15 5 Insert (see the arrow in Figure 3-5) the module into the board guides at the top and bottom of the slot and slide it into the hub by pressing firmly at the top and bottom of the faceplate. Figure 3-5 shows the installation of the module. Figure 3-5 Installing a Media Module 3-16 INSTALLING THE M ODULE 6 Close the media module ejectors (Figure 3-6). Opened position Closed position Half-height level Apply pressure here Figure 3-6 Opened and Closed Module Ejectors 7 Fasten the spring-loaded screws on the front of the media module faceplate to the hub using your fingers (do not over-tighten). Installing the Module Copper Lobe Port Connections 3-17 Copper lobe ports are designed to connect to end stations. They cannot be used to interconnect modules. See Chapter 2, Designing and Expanding the Network, for wiring specifications. Copper Ring-In/Ring-Out Trunk Connections When connecting Ring-In/Ring-Out ports to a non-CoreBuilder 5000 ring, for example, ONline System Concentrator, IBM 8230 CAU, install a Jitter Attenuator Daughter Card. To connect Ring-In/Ring-Out ports: 1 Attach one end of the twisted pair cable (STP-type only) to the copper Ring-Out port. 2 Attach the other end to a copper Ring-In port on the second module. 3 Interconnect any remaining modules using each module's Ring-In/Ring-Out ports. To form a full ring, be sure to make connections using both the copper Ring-In and Ring-Out ports. When you configure ports 17 and 18 on the active per-port module or the active per-module media module as RI/RO, install cable adapter 6200ADT-RI on the Ring-In port, port #18, which crosses over the RX/TX wires in the cable. See Appendix A, Figure A-2, for a pinout diagram. To provide maximum fault tolerance for multivendor configurations: Ensure that the local ring starts and ends with the copper Ring-In and Ring-Out ports. Set the correct compatibility mode using the SET TRUNK {slot} {RING_IN/RING_OUT} COMPATIBILITY_MODE command. 3-18 INSTALLING THE M ODULE Fiber Ring-In/Ring-Out Connections In a typical configuration, Dual Fiber Repeater Modules in separate wiring closets are connected to the trunk ring through the fiber Ring-In and Ring-Out ports. Refer to Chapter 2 for fiber trunk cable specifications. To establish a fiber Ring In/Ring Out connection: When connecting Ring-In/Ring-Out ports to a non-CoreBuilder 5000 ring (ONline System Concentrator, IBM 8230 CAU), install a Jitter Attenuator Daughter Card for the associated trunk ports to ensure interoperability. 1 Remove the plastic fiber covers from the cable ports that will be used. Keep the unused cable ports capped to keep the optics clean. 2 Before installing, make certain all cables have been properly cleaned with an appropriate fiber optic cleaning solution. 3 Attach the fiber cables to the fiber ports on the front panel of the module. Make sure the transmit and receive cables are: Clearly marked or color coded Connected to the appropriate ports on the module (for example, the fiber Ring-In receive is connected to a fiber Ring-Out transmit) Do not exceed the bend radius for the fiber cable when directing the cables under the hub. Refer to the cable manufacturer's specifications for minimum bend radius. 4 Attach the other end of the cable to another Token Ring fiber trunk port. Make sure the transmit fiber at one end of the cable is always connected to a receive port at the other end. 5 If connecting to an ONline System Concentrator or IBM 8230, issue the SET TRUNK {slot} {RING_IN/RING_OUT} COMPATIBILITY_MODE command from the DMM in the CoreBuilder 5000 hub to ensure compatibility. Where to Go From Here Once you complete this chapter, go to Chapter 4. Chapter 4, Configuring the Module, describes how to configure CoreBuilder 5000 Token Ring Media Modules using management commands. 4 CONFIGURING THE MODULE This chapter describes how to configure CoreBuilder TM 5000 Token Ring Media Modules. This chapter contains the following sections: Configuring the Modules Configuring Trunks Saving the Configuration Showing Module Configurations Monitoring the Front Panel LED and Network Verification For additional information on network management commands described in this section, refer to the CoreBuilder 5000 Distributed Management Module Commands Guide. Configuration Overview CoreBuilder 5000 network management modules provide network management for the CoreBuilder 5000 Integrated System Hub and its modules. If you are using a Distributed Management Module (DMM), the DIP switch settings on the media module are ignored (unless you set up the DMM to configure the module from DIP switches). For this reason, use network management commands, rather than the DIP switches, to configure the module. 4-2 CONFIGURING THE M ODULE Before You Begin If a Management Module is present when you first install the module, the network defaults to isolated mode and the ports are automatically disabled (so that users cannot join the network undetected by network management). Therefore, you must enable the ports you wish to use and set the module ports to the appropriate network using management commands. Upon initial installation of the module, it is useful to set certain parameters before proceeding further. After installation, perform the following network management commands to configure the media module: Setting Network Ring Speed Selecting a Network Enabling Ports Enabling Beacon Recovery Enabling Static Ring Switching Enabling Mismatch Resolution (Passive and Active Per-Module Media Modules Only) Moving Rings from Module-Level to Hub-Level Setting Port Alert Filters Enabling Speed Detect (Passive Module Only) Setting Module Speed Threshold (Passive Module Only) For additional information on any network management command described in this section, refer to the CoreBuilder 5000 Distributed Management Commands Guide. Configuring the Modules This section describes network management commands to help you configure CoreBuilder 5000 Token Ring Media Modules for your environment. This section contains the following information: Setting Network Ring Speed Selecting a Network Enabling Ports Enabling Beacon Recovery Configuring the Modules Setting Network Ring Speed Setting Beacon Threshold Enabling Static Ring Switching Enabling Mismatch Resolution (Passive and Active Per-Module Media Modules Only) Moving Rings from Module-Level to Hub-Level Setting Port Alert Filters Enabling Speed Detect (Passive Module Only) Setting Module Speed Threshold (Passive Module Only) 4-3 Use the SET NETWORK TOKEN_RING RING_SPEED command to set the ring speed of a specified network. Any module, port, trunk, or daughter card assigned to the network is automatically set to the speed of the network. The command sequence is: SET NETWORK TOKEN_RING {network} RING_SPEED {4_MBP} {16_MBPS} Where: network = token_ring_1 to token_ring_10 isolated_1 {slot} - isolated _11 {slot} The following command sets the ring speed for backplane network token_ring_4 to 16 Mbps: CB5000> set network token_ring token_ring_4 ring_speed 16mbps Value set to 16 Mbps. 4-4 CONFIGURING THE M ODULE Selecting a Network CoreBuilder 5000 media modules provide module-level or port-level configuration flexibility using the CoreBuilder 5000 hub's unique architecture. This section describes how to assign (collectively or individually) the following to any of 10 backplane networks (or up to 11 isolated module segments): Assigning Modules Assigning Ports Refer to the CoreBuilder 5000 Integrated System Hub Installation and Operation Guide, Chapter 1, Introduction for a complete discussion of the CoreBuilder 5000 hub architecture. Assigning Modules The DIP switch settings on the media module assign all ports (collectively) on the module to network 1 through 10 or to an isolated segment. Network management, however, assigns one or more ports to a network. If you have a CoreBuilder 5000 TR NMC, Network Management also assigns the NMC to a network. The following command assigns a module or submodule to a network: SET MODULE {slot.subslot} NETWORK {token_ring_1.._10} {isolated_1..._11} {isolated} The CoreBuilder 5000 TR NMC Card is automatically configured as subslot 2 on the media module. The default setting, subslot 1, refers to the media module. Assigning Ports For modules that support port switching, the following network management command assigns a port to a network: SET PORT {slot.port} NETWORK {token_ring_1.._10} {isolated_1..._11} Configuring the Modules 4-5 Use the SET PORT NETWORK command to assign users to backplane (hub-level) segments or isolated (module-level) segments. For instance, to create a module-level ring, you must assign all of the users in the group to one isolated network (for example, ISOLATED_1). Enabling Ports Use the SET PORT MODE command to enable or disable each of the ports on the media module. When a port is enabled, it can transmit to and receive data from the network to which the module port is assigned. The command sequence is: SET PORT {slot.port} MODE {enable} {disable} {slot.all} Use the SET PORT command to disable a port (port 2 on the module in slot 6): set port 6.2 mode disable Enabling Beacon Recovery Use the SET NETWORK TOKEN_RING BCN_RECOVERY command to enable or disable the beacon recovery mechanism on a CoreBuilder 5000 network. The default is enabled. The command sequence is: SET NETWORK TOKEN_RING {network} BCN_RECOVERY {mode} Where: network = token_ring_1 - token_ring_10 isolated slot isolated_1 slot - isolated _11 slot mode = enable disable The following command enables the beacon recovery mechanism for backplane network token_ring_3: CB5000> set network token_ring token_ring_3 bcn_recovery enable Value set to ENABLED. 4-6 CONFIGURING THE M ODULE Statistics are not accurate on a beaconing ring. To correct this condition, resolve beaconing and then clear all statistics. This is normal operation. Setting Beacon Threshold Use the SET MODULE BCN_THRESHOLD to set the number of times that a phantom transition, caused by a beaconing condition, is allowed to cause a port or trunk to unwrap before the port or trunk is removed from the ring. The command sequence is: SET MODULE {slot}.1 BCN_THRESHOLD {threshold} Where: {slot}.1 = module 1 to 17, subslot 1 {threshold} = 0 to 255 phantom transitions The following command sets the beacon threshold of the Active Per Port Module in slot 7 to a maximum of 7. If this threshold is exceeded for a port or trunk, that port or trunk is removed from the ring: CB5000> set module 7.1 bcn_threshold 7 [ENTER] Threshold set to 7. The default value for Set Beacon Threshold is 7. A value of 0 (zero) means infinite, therefore you will never reach the maximum threshold value. Enabling Static Ring Switching Use the SET PORT STATIC_SWITCH to: Force users to power down a station before switching rings or networks. This forces the station to perform a duplicate address test before entering a new ring. Prevent ports from being switched from one ring to another when a phantom is present. This command applies only to port switching modules. Configuring the Modules 4-7 The command sequence is: SET PORT {slot}.{port} STATIC_SWITCH {setting} Where: {slot} = hub slot 1 to 17 {port} = 1 to 24 or all {setting} = disable enable The following command disables static switch on port 2 on the module in slot 6: CB5000> set port 6.2 static_switch disable Port 6.02 set to DISABLED. [ENTER] The default is enable, forcing the users to power off the station to switch rings. Enabling Mismatch Resolution (Passive and Active Per-Module Media Modules Only) Use the SET NETWORK TOKEN_RING MISMATCH_RESOLUTION command to: Enable the mismatch resolution algorithm for the specified network. Perform address-to-port mapping when you use a splitter or fan-out device on a CoreBuilder 5000 Token Ring port. The default is disable. The command sequence is: SET NETWORK TOKEN_RING {network} MISMATCH_RESOLUTION {mode} Where: network = token_ring_1 - token_ring_10 isolated slot isolated_1 slot - isolated _11 slot mode = enable disable 4-8 CONFIGURING THE M ODULE Example: The following command enables the mismatch resolution mechanism on backplane network token_ring_3: CB5000> set network token_ring token_ring_3 mismatch_resolution enable Value set to ENABLED. Moving Rings from Module-Level to Hub-Level Use SET NETWORK TOKEN_RING MODE command to toggle entire rings between isolated (module-level) and backplane (hub-wide) Token Ring networks. This command is valid for port-switched modules only. This setting is saved automatically and is not affected by the SAVE or REVERT commands. This command affects only the specified slot and cannot be used to isolate every module in the hub. You can implement each of the 10 available token rings on CoreBuilder 5000 port-switching media modules either on a backplane (hub-wide) or an isolated (module-level) network. Use this command to toggle sets of ports between backplane and isolated. You may only toggle rings 1 through 10. You specify a slot number when indicating the isolated network the command affects. The command only affects the specified slot and cannot be used to isolate each module in the hub. The command sequence is: SET NETWORK TOKEN_RING {network} MODE BACKPLANE ISOLATED {slot} Where: network ISOLATED {slot} affects Example: = token_ring_1 to token_ring_10 isolated_1 {slot} - isolated _11 {slot} = identifies the isolated network the command The following command assigns all ports assigned to isolated_3 (module-level ring) in module 7 to token_ring_3 (backplane ring): CB5000> set network token_ring isolated_3 7 mode backplane Configuring the Modules 4-9 If you enter the command shown in the previous example, all ports assigned to network isolated_3 join backplane network token_ring_3 (Figure 4-1). AAAAAAAAAAAAAAAAAAAAAAA AAAAAAAAAAAAAAAAAAAAAAA AA AAAA AAAAAAAA AAAAAAAA AAAAAAAA AAAAAAAA AAAAAAA AAA AAAAAAAAAAAAAAAAAAAAAAA Figure 4-1 Setting Port Alert Filters CoreBuilder 5000 Token Ring Network Mode Use the SET ALERT PORT ALERT_FILTER command to enable or disable port up and port down trap generation for a specific port. This command works in conjunction with the SET ALERT (PORT_UP_DOWN_FILTER) command. Once the SET PORT ALERT_FILTER command has been enabled for a port, you must issue the SET ALERT PORT_UP_DOWN_FILTER command to allow or prevent port up and port down traps to be transmitted from the DMM to the designated trap receiver. The DMM sends a port_up_down trap whenever a port on the stack starts operating (goes up) or stops operating (goes down). If you disable the port_up_down alerts, the DMM does not generate the alerts. If you enable the port_up_down alerts, the DMM generates alerts for all ports in the hub. 4-10 CONFIGURING THE M ODULE Use the following command to enable or disable the port up and port down trap generation (alerts) for a port: SET PORT {slot.port} ALERT_FILTER {slot.all} {enable} {disable} The following command sets alert filter on port 1 of a module in slot 1: CB5000> set port 1.1 alert_filter enable [ENTER] Port 01.01 Alert Filter set to ENABLE. For more information on this command, refer to the Distributed Management Module Commands Guide. Enabling Speed Detect (Passive Module Only) Use the SET PORT SPEED_DETECT command to prevent stations from inserting into a ring at the incorrect speed. When an incorrect speed station is detected, the port is wrapped and the status is set to SPEED MISMATCH. The port or trunk unwraps when a transition of phantom is detected, or when the user disables and then re-enables the port or trunk. The default is disable. The command sequence is: SET PORT {slot}.{port} SPEED_DETECT {setting} Where: {slot} {port} = hub slot 1 to 17 = 1 to 20 all {setting} = enable disable Example: The following command enables speed detect on port 1 of the Passive Media Module in slot 7: CB5000> set port 7.1 speed_detect enable [ENTER] Port 07.01 Speed Detection set to ENABLED. Configuring Trunks Setting Module Speed Threshold (Passive Module Only) 4-11 Use the SET MODULE SPEED_THRESHOLD command to set the number of times that a phantom transition caused by a ring speed mismatch is allowed to cause a port to unwrap before the port is removed from the ring. This command applies to the CoreBuilder 5000 Passive Token Ring Media Module (Model Number 6220M-TP). Use the Set Port Speed Detect command to enable speed detection. The default is 7. The command sequence is: SET MODULE {slot}.1 SPEED_THRESHOLD {threshold} Where: {slot}.1 = module 1 to 17, subslot 1 {threshold} = 0 to 255 phantom transitions To reset this threshold, disable and re-enable the port from the management console. Example: The following command sets the speed threshold of the module in slot 7 to a maximum of 7. If this threshold is exceeded for a port or trunk, that port or trunk is removed from the ring: CB5000> set module 7.1 speed_threshold 7 [ENTER] Threshold set to 7. The default Threshold is 7. A value of 0 (zero) means infinite, therefore you will never reach maximum threshold value. Configuring Trunks Use the SET TRUNK command to configure the following options for either copper or fiber trunk ports: Trunk Enable Trunk Network Selection Trunk Compatibility Mode You must install a Jitter Attenuator Card on any module that connects to a non-CoreBuilder 5000 network. 4-12 CONFIGURING THE M ODULE Trunk Enable Use the SET TRUNK MODE command to enable or disable CoreBuilder 5000 Token Ring trunk ports. The command sequence is: SET TRUNK {slot} ring_in. { 1 or 2} MODE {enable} ring_out. { 1 or 2} {disable} Trunk Network Selection Use the SET TRUNK NETWORK command to set a trunk port to a particular backplane or isolated network. The command sequence is: SET TRUNK {slot} ring_in. {1 or 2} NETWORK {token_ring_1..._10} ring_out. {1 or 2} {isolated_1..._11} Trunk Compatibility Mode Use the SET TRUNK RING_IN/RING_OUT COMPATIBILITY_MODE command to ensure that the signalling used by a CoreBuilder 5000 trunk port is compatible with the trunk port connected at the other end of the copper or fiber cable. Table 4-1 shows the compatibility settings to use when connecting a CoreBuilder 5000 trunk port: Table 4-1 CoreBuilder 5000 Compatibility Settings To Connect CoreBuilder 5000 Modules to: Set Compatibility Mode to: CoreBuilder 5000 modules CoreBuilder 5000 ONline System Concentrator ONline ONline 5204M-CR ONsemble ONsemble ONsemble IBM(R) 8238 8250 T04MS-CR IBM 8238 Token Ring Stackable Hub 8238 IBM 8230 CAU 8230 IBM 8228 MAU 8230 IBM 8250 Multiprotocol Intelligent Hub 8250 IBM 8260 Multiprotocol Intelligent Switching Hub 8260 Saving the Configuration 4-13 For reference, Table 4-2 shows the compatibility settings to use when connecting an ONline module trunk port: Table 4-2 ONline Compatibility Settings To Connect ONline to: Set Compatibility Mode to: ONline Disable CoreBuilder 5000 Disable IBM 8230 CAU Enable The command sequence for the trunk compatibility mode is: SET TRUNK{slot} ring_in.{1 or 2} COMPATIBILITY_MODE {mode} ring_out.{1 or 2} Where: Saving the Configuration {slot} = slot containing the trunk port {mode} = disable, enable, CoreBuilder 5000, ONline, 8230, 8260, 8250 After you make configuration changes to a module and ports, you must issue the SAVE MODULE_PORT command to save the new settings. CAUTION: Failure to save module settings may cause you to lose configuration data. Showing Module Configurations You can display status information about the media module using the following network management commands: SHOW MODULE SHOW MODULE VERBOSE SHOW PORT SHOW PORT VERBOSE These commands are explained in the following sections. 4-14 CONFIGURING THE M ODULE Using the Show Module Command The SHOW MODULE command enables you to display both brief and verbose information about a particular module. The command sequence is: SHOW MODULE {slot.subslot} {slot.all} Example: {verbose} {no_verbose} The following output is an example of the SHOW MODULE VERBOSE command issued for a media module installed in slot 10: CB5000> Show module 5.1 verbose Slot Module Version ----- -------------- ------05.01 6220M-TP 1.00.0 Network General Information ------------ ------------------TOKEN_RING_1 6220M-TP: CB5000 Token Ring Passive Module Switching Twisted Pair Module Boot Version: Ring Speed DIP Setting: DIP Network Setting: Non-Volatile DIP Setting: Recovery Asic Primary Address: Recovery Asic Secondary Address: Beacon Threshold: Speed Detect Threshold: 1.00.0 16 MBPS ISOLATED DISABLED 52-41-50-4d-41-43 52-41-53-4d-41-43 7 7 Showing Module Configurations Using the Show Port Command The SHOW PORT command enables you to display both brief and verbose information on both individual ports and all ports collectively. The command sequence is: SHOW PORT Example: 4-15 {slot.port} {slot.all} {verbose} {no_verbose} The following output is an example of the SHOW PORT ALL VERBOSE command issued for a media module installed in slot 7 (only the output for ports 1, 2, and 3 are shown): CB5000> show port 7.all verbose Port Display for Module 6218M-ATPP : Port Mode Status Network General Information ----- -------- --------------- --------------- -----------------07.01 ENABLED NO PHANTOM TOKEN_RING_1 Port is down Port Alert Filter: Port Connector: DIP Network Setting: Static Switch: 07.02 ENABLED NO PHANTOM Port Alert Filter: Port Connector: DIP Network Setting: Static Switch: DISABLED RJ45S ISOLATED_11 DISABLED TOKEN_RING_1 Port is down DISABLED RJ45S ISOLATED_11 DISABLED Port Mode Status Network General Information ----- -------- --------------- ---------------- ----------------07.03 ENABLED NO PHANTOM TOKEN_RING_1 Port is down Port Alert Filter: Port Connector: DIP Network Setting: Static Switch: DISABLED RJ45S ISOLATED_11 DISABLED CONFIGURING THE M ODULE 1 4 7 10 13 16 MODULE STATUS 1 2 MOD/STA The LEDs on the front panel of the media module allow you to monitor the status of each port. Each media module has a Status LED for each port. Figure 4-2 shows the location of the LEDs. Each LED indicates the state of a port as described in Table 4-3. MOD/STA JA RIRO Monitoring the Front Panel MOD/STA JA RIRO 4-16 3 6 9 12 15 18 1 4 7 10 13 16 1 3 5 7 9 RI1 RI2 JA1 2 4 6 8 10 RO1 RO2 JA2 1 2 3 4 5 6 7 8 9 10 R RI-1 X TX RX RO-1 TX RX RI-2 T X 18 /R RO-2 R /R 17 / 17 TX O O Active Per-Port Switching Module Figure 4-2 RX 18 /R Active Per-Module Switching Module Media Module Faceplates Passive Media Module Dual Fiber Repeater Module LED and Network Verification Table 4-3 Media Module LED Interpretation LED Name Color State Indicates Module Status Green OFF No power. Blinking Module failed self diagnostics. ON Module powered up OK. OFF Trunk disabled. ON Trunk enabled and operating. Blinking Trunk enabled, but not operating. ON Port enabled, phantom detected, port enabled onto ring, status OK. 1 blink Port enabled, no phantom. OFF Port disabled. OFF Card not installed. ON Card installed and operating normally. OFF Ports 17 and 18 are lobe ports. ON Ports 17 and 18 Trunk (RI/RO) ports. Ring-In/ Green Ring-Out (RI/RO) LEDs Port Status LED and Network Verification 4-17 Green Jitter Attenuator Card (JA, JA1, JA2) Green RI/RO (ATPP, ATP) Green This section provides information on LED and Network verification information for the media module. The following topics are discussed: Using the CoreBuilder 5000 Controller Module to Verify LED Operation Using the DMM to Verify Network Connections For more information on the DMM, refer to the Distributed Management Module User Guide. Using the CoreBuilder 5000 Controller Module to Verify LED Operation The CoreBuilder 5000 hub's controller module is equipped with an LED Test button on the front panel. Use the LED Test button to verify LED operation. When you press this button, the module initiates a test to all modules in the hub. All LEDs should respond by lighting continuously for approximately five seconds. Any LED that does not light is defective. This test does not disrupt network operation. 4-18 CONFIGURING THE M ODULE Using the DMM to Verify Network Connections The DMM enables you to verify each network connection (both active and isolated) for all CoreBuilder 5000 modules and NMC cards installed in your hub. To initiate the verification process: 1 Press the Display Control Toggle button on the front of the module. 2 Observe as the DMM sequentially cycles through each network connection (Ethernet, Token Ring, then FDDI) and lights each status LED associated with the network indicated on the DMM LCD display. All isolated networks (1 through 11) light at the same time, rather than one by one. Where to Go From Here Once you complete this chapter, proceed to Chapter 5. Chapter 5, Troubleshooting, describes troubleshooting procedures for CoreBuilder 5000 Token Ring Modules. If you have problems configuring or installing your media module, refer to Chapter 5 prior to contacting customer support. 5 TROUBLESHOOTING This chapter describes troubleshooting procedures for the CoreBuilderTM 5000 Token Ring Module. Information on troubleshooting may assist you in verifying the module's operation. This chapter is divided into the following parts: General Troubleshooting Tips Troubleshooting Using the Status LEDs Troubleshooting Ring Problems Trunk Interoperability Problems Technical Assistance 5-2 TROUBLESHOOTING General Troubleshooting Tips Improper configuration of a module may cause unexpected results. The LEDs on the module provide a good indication of errors. Troubleshooting using the port and module LEDs is described later in this chapter. If you experience a problem with your module, you should also verify that: All cabling and connection hardware meets the specifications outlined in Chapter 2 of this guide Any attaching device or station is set to the same ring speed as the network that the port (port-switching media modules) or module (module-switching media modules) is assigned to. Only STP cabling, or Level 4 or 5 UTP cabling, used on the copper Ring-In/Ring-Out ports Fiber cabling connects properly (that is, transmit always connects directly to receive) Fiber Ring-In port connects to a fiber Ring-Out port Fiber ports on the module are used to connect only to other CoreBuilder 5000 devices, ONline devices, or to an IBM 8230 Controlled Access Unit (CAU) Jitter Attenuator Card is attached to Ring-In/Ring-Out ports that connect to non-CoreBuilder 5000 equipment Trunk compatibility mode settings on 3Com devices are set as described in Chapter 4 of this guide Troubleshooting Using the Status LEDs Troubleshooting Using the Status LEDs Troubleshooting Using the Module Status LED 5-3 In certain situations, the status LEDs may not light. This section describes the following: Troubleshooting Using the Module Status LED Troubleshooting Using the Port Status LEDs Table 5-1 outlines possible causes and some solutions for troubleshooting the Module Status LED. Table 5-1 Troubleshooting Using the Module Status LED LED State Possible Cause Corrective Action OFF Hub power is off Check the controller module power LEDs. The module or slot is faulty Try a different module. Remove and re-insert the module. The hub does not have enough available power for a new module installation Use the SHOW POWER BUDGET management command to ascertain available power in the hub (see the Distributed Management Module Commands Guide for more information). 5-4 TROUBLESHOOTING Troubleshooting Using the Port Status LEDs Table 5-2 outlines possible causes and some solutions for troubleshooting the Port Status LEDs. A blinking Port Status indicator signals a problem with a port or link connected to a port. Table 5-2 LED State 1 blink OFF Troubleshooting Using the Port Status LEDs Indication Possible Cause Port enabled, but no station is detected (phantom current is not detected). Station not powered. Turn on the PC or other connected. Port disabled Corrective Action Faulty cable. Replace the cable No cable connected to station. Disable the port. Station speed does not match the network speed. Check the speed of the station and network. Make sure the speeds match. Station not inserted on ring. Run your software application to cause the Token Ring end station to insert onto the ring. Port disabled. Enable port. Module not receiving power. Check the controller module power LEDs. Power management system has powered down slot. Check hub power management settings (see the DMM User Guide for more information). Broken LED. Press the LED check button on the controller module. Faulty module. Replace module. Troubleshooting Ring Problems Troubleshooting Ring Problems Problems Adding a New Station to an Operating Ring 5-5 This section provides remedies for problems you could encounter when working with Token Ring Networks. Problems may arise when using the lobe ports to add a new station to an operating ring. The station does not initialize properly on the ring, and reports that it has failed diagnostic testing. Problems of this type are generally traced to horizontal cabling that attaches the station to the hub. To resolve a 'failed diagnostic' ring problem: 1 Verify that the port is enabled on the module that the failing station is attached to. If the front panel LED corresponding to this port is: On or blinking, go to step 2. Off, the port is disabled. Enable the port to allow the station to attach to the ring. 2 Verify that the station adapter card is set to the same ring speed as the hub port. 3 Verify the presence of the DC phantom current generated by the station when requesting attachment to the ring. Observe the front panel LED of the port connected to the failing station. The LED should be blinking when no cable is attached, or when the station has not yet requested attachment to the ring. Once the station attaches to the ring, the LED should be on continuously. If the LED does not stay on continuously, the station is not requesting attachment or is unable to attach to the ring. Check the cabling and confirm that the station is operating properly. 4 Verify that the cables being used to connect the station to the hub are secure. Be sure not to exceed the maximum lobe cable distances recommended in Chapter 2. Also, verify that the pinout of the attaching cables meets the requirements described in Appendix A. If the adapter is set for the incorrect speed, the station may report that it has inserted itself on the ring, even though the module has prevented the station from inserting. 5-6 TROUBLESHOOTING Intermittent Errors on an Operating Ring An operating ring may experience occasional soft errors. This occurrence is normal in Token Ring devices. Usually, these errors are caused by stations removing themselves from and inserting themselves on the ring. A low soft-error level does not affect network performance. The following error types are reported by stations: Line Burst Lost token or frame Rings that exhibit continual soft errors, particularly in the absence of insertion and removal activity, may be suffering from: Ring Failures Excessive noise or jitter Facility wiring Devices that do not meet specifications In some situations, an operating ring may fail. However, the ring wraps to the backup path and continues operation. If a module fails, it removes itself off of the backplane and the remainder of the ring continues to operate. This may be reported by stations as "Ring Beaconing", or stations may simply fail to attach to the ring. Module beacon recovery isolates virtually all faults in the data path. Ring failure usually indicates: Problems in the trunk cabling Ring speed has been incorrectly set for the module To resolve a ring failure: 1 Verify that all Ring-In/Ring-Out cables are connected. A broken Ring-In/Ring-Out copper cable can cause the ring to fail, particularly when attached to other vendors' equipment. 2 Verify that any other devices in the trunk path (for example, repeaters) are operating properly. Trunk Interoperability Problems 5-7 3 If the trunk ring appears to be operating, the problem source may reside at higher software layers. If your network is based around a single file server, problems in the server or its network attachment can cause the ring to fail. Trunk Interoperability Problems If your trunk connections to CoreBuilder 5000 Token Ring Modules are not operating properly, check each of the following and ensure that you: 1 Have set each end of the connection to the proper compatibility mode (see Chapter 4 for more information). 2 Install a jitter attenuator card on the CoreBuilder 5000 module if connecting to a non-CoreBuilder 5000 ring. 3 Only connect CoreBuilder 5000 fiber trunks to 3Com ONline System Concentrator, 3Com CoreBuilder 5000 hub, IBM 8250 hub, IBM 8260 hub, or IBM 8230 CAU trunk ports. The JA LED on the module should light. 4 Check that all cabling used meets the specifications outlined in Chapter 2. 5 Check that the fiber cabling is connected properly (that is, transmit always connects directly to receive). 6 If using the Ring-In/Ring-Out ports on an Active Per-Port Media Module or an Active Per-Module Media Module, make sure that you either: Install cable adapter 6200ADT-RI on the Ring-In port, which crosses over the RX/TX wires in the cable. Use a cable on the Ring-In port that crosses over the RX/TX connections. See Appendix A, Figure A-1, for a pinout diagram. 7 When trunk ports are enabled, check that the jumpers for the trunks are set properly. 5-8 TROUBLESHOOTING Technical Assistance You can receive assistance for installing and troubleshooting the Token Ring Media Module by calling either your 3Com reseller or 3Com Technical Support. Be prepared to supply a representative with the following information: Description of the problem Steps you have taken to try and correct the problem Type and software version of the network management module being used Version of software installed on your CoreBuilder 5000 Token Ring Media Module Status of the front panel LEDs Configuration of your hub (you may find it helpful to refer to the Hub Planning Chart in the CoreBuilder 5000 Reference Library for a record of this information) Where to Go From Here If you complete this chapter and are still unable to ascertain the cause of a particular problem with your module, contact 3Com Customer Support and provide them with the specific nature of your problem. Refer to Appendix B for information on contacting 3Com Technical Support. A SPECIFICATIONS This appendix lists specifications for the Token Ring Media Modules. The module specifications included are: Token Ring Active Per-Port Switching Media Module Specifications Token Ring Active Per-Port Switching Media Module Specifications Token Ring Active Per-Module Switching Media Module Specifications Token Ring Dual Fiber Repeater Module Specifications Token Ring Passive Media Module Specifications Token Ring Jitter Attenuator Card Specifications Twisted Pair (Copper) Connector Pinouts Active Per-Port and Active Per-Module Media Module Ring-In Port Adapter Pinout Data Rate 4 and 16 Mbps Connectors Shielded RJ-45 (pinout appears later in this appendix) Cable Requirements Supports UTP, STP, and 120 ohm Cabling Systems Power Requirements 38 w +5 V DC, 0.5 w +12 V DC Mechanical Occupies 1 Slot Daughter Card Support 1 Jitter Attenuator Daughter Card 1 Token Ring Network Monitor Card Environmental Operating Temperature 0 to 50 C (32 to 122F) Humidity Less than 95%, noncondensing BTUs/hr 131.4 A-2 SPECIFICATIONS Token Ring Active Per-Module Switching Media Module Specifications Data Rate 4 and 16 Mbps Connectors Shielded RJ-45 (pinout appears later in this appendix) Cable Requirements Supports UTP, STP, and 120 ohm Cabling Systems Power Requirements 28 w +5 V DC, 0.5 w +12 V DC Mechanical Occupies 1 Slot Daughter Card Support 1 Jitter Attenuator Daughter Card 1 Token Ring Network Monitor Card Environmental Token Ring Dual Fiber Repeater Module Specifications Operating Temperature 0 to 50 C (32 to 122F) Humidity Less than 95%, noncondensing BTUs/hr 96.9 Connectors Shielded RJ-45, ST Fiber Optic Data Rate 4 and 16 Mbps Cable Requirements Supports UTP, STP, and 120 ohm Cabling Systems Supports Fiber 62.5/125 m, 50/125 m, 85/125 m, 100/140 m Power Requirements 37 w +5 V DC, 0.5 w +12 V DC, and 0.25 w -12 V DC Mechanical Occupies 1 Slot Daughter Card Support 2 Jitter Attenuator Daughter Cards 1 Token Ring Network Monitor Card Environmental Operating Temperature 0 to 50 C (32 to 122F) Humidity Less than 95%, noncondensing BTUs/hr 128.8 Token Ring Passive Media Module Specifications Fiber Transmitter A-3 Light Source: LED at wavelength 850 nm Transmit Power: -13 to -19 dBm average Fiber Receiver Light Detector: Silicon PIN photodiode Input Range: Optical power input of -12 to -28 dBm Dynamic Range: 16 dBm Bit Error Rate: 1 in 10-10 over dynamic range Fiber Connectors Token Ring Passive Media Module Specifications ST-type Connectors Shielded RJ-45 Data Rate 4 and 16 Mbps Cable Requirements Supports UTP, STP, and 120 ohm Cabling Systems Power Requirements 16 w +5 V DC, 1.5 w +12 V DC, and 1.25 w -12 V DC Mechanical Occupies One Slot Daughter Card Support 1 Token Ring Network Monitor Card Environmental Token Ring Jitter Attenuator Card Specifications Operating Temperature 0 to 50 C (32 to 122F) Humidity Less than 95%, noncondensing BTUs/hr 64 Connectors Power Requirements 30-pin connector 1 w +5 V DC, 1 w +12 V DC, and 0.5 w -12 V DC Environmental Operating Temperature 0 to 50 C (32 to 122) Humidity Less than 95%, noncondensing BTUs/hr 8.5 Mechanical 2.5" x 5" (6.35 cm x 12.7 cm) A-4 SPECIFICATIONS Twisted Pair (Copper) Connector Pinouts You must use the IEEE 802.5 Token Ring standard for pinouts. The following cable standard must be used for an 8-pin connector. Token Ring uses 2 pairs of wire: pins 3 & 6 and pins 4 & 5 (see Figure A-1). If you do not configure the pairs this way, the connection does not work properly. Ensure an 8-pin connector on datagrade cable has the following pin pairings: pins 4 and 5 are pair 1 pins 3 and 6 are pair 2 pins 1 and 2 are pair 3 (not used) pins 7 and 8 are pair 4 (not used) Station Transmit Not Used 1 W-G Not Used Station Receive 2 3 4 G W-O BL 5 W-BL 6 7 8 O W-BR BR Hub Transmit Jack Positions Hub Receive Figure A-1 RJ-45 Connector Pinouts Active Per-Port and Active Per-Module Media Module Ring-In Port Adapter Pinout Active Per-Port and Active Per-Module Media Module Ring-In Port Adapter Pinout A-5 You do not need to refer to this wiring diagram if you use cable adapter 6200ADT-RI. Use the wiring diagram below (Figure A-2) to create a device that imitates the function the optional ring-in port adapter when you do not plan to use cable adapter 6200ADT-RI. Figure A-2 1 1 2 2 3 3 4 4 5 5 6 6 7 7 8 8 6200ADT-RI Ring-In Wire Diagram B TECHNICAL SUPPORT 3Com provides access to technical support information through a variety of services. This appendix describes these services. Information contained in this appendix is correct at time of publication. For the very latest, access 3Com Corporation's World Wide Web site as described below. This appendix describes: Online Technical Services Online Technical Services Support From Your Network Supplier Support From 3Com Corporation Returning Products for Repair Accessing the 3Com MIB Contacting 3Com Technical Publications 3Com offers worldwide product support 24 hours a day, 7 days a week, through the following online systems: World Wide Web Site 3Com Bulletin Board Service 3ComFacts Automated Fax Service 3ComForum on CompuServe Online Service B-2 TECHNICAL SUPPORT World Wide Web Site Access the latest networking information on 3Com Corporation's World Wide Web site by entering our URL into your Internet browser: http://www.3Com.com/ This service features news and information about 3Com products, customer service and support, 3Com Corporation's latest news releases, NetAge Magazine, and more. 3Com Bulletin Board Service 3ComBBS contains patches, software, and drivers for all 3Com products, as well as technical articles. This service is available through modem or ISDN 24 hours a day, 7 days a week. Access by Analog Modem To reach the service by modem, set your modem to 8 data bits, no parity, and 1 stop bit. Call the telephone number nearest you: Country Data Rate Telephone Number Australia up to 14400 bps 61 2 9955 2073 Brazil up to 14400 bps 55 11 547 9666 France up to 14400 bps 33 1 6986 6954 Germany up to 28800 bps 4989 62732 188 Hong Kong up to 14400 bps 852 2537 5608 Italy (fee required) up to 14400 bps 39 2 27300680 Japan up to 14400 bps 81 3 3345 7266 Mexico up to 28800 bps 52 5 520 7853 P. R. of China up to 14400 bps 86 10 684 92351 Singapore up to 14400 bps 65 534 5693 Taiwan up to 14400 bps 886 2 377 5840 U.K. up to 28800 bps 44 1442 438278 U.S.A. up to 28800 bps 1 408 980 8204 Access by Digital Modem ISDN users can call 3ComBBS using a digital modem for fast access up to 56 Kbps. To access 3ComBBS using ISDN, use the following number: 408 654 2703 Online Technical Services 3ComFacts Automated Fax Service B-3 3Com Corporation's interactive fax service, 3ComFactsSM, provides data sheets, technical articles, diagrams, and troubleshooting instructions on 3Com products 24 hours a day, 7 days a week. Call 3ComFacts using your Touch-Tone telephone using one of these international access numbers: Country Telephone Number Hong Kong 852 2537 5610 U.K. 44 1442 278279 U.S.A. 1 408 727 7021 Local access numbers are available within the following countries: 3ComForum on CompuServe Online Service Country Telephone Number Country Telephone Number Australia 1 800 123853 Netherlands 06 0228049 Belgium 0800 71279 Norway 800 11062 Denmark 800 17319 Portugal 0505 442 607 Finland 98 001 4444 Russia (Moscow only) 956 0815 France 05 90 81 58 Spain 900 964 445 Germany 0130 81 80 63 Sweden 020 792954 Italy 1678 99085 U.K. 0800 626403 3ComForum is a CompuServe-based service containing patches, software, drivers, and technical articles about 3Com products, as well as a messaging section for peer support. To use 3ComForum, you need a CompuServe(R) account. To use 3ComForum: 1 Log on to CompuServe. 2 Type go threecom 3 Press Return to view the 3ComForum main menu. B-4 TECHNICAL SUPPORT Support From Your Network Supplier If additional assistance is required, contact your network supplier. Several suppliers are authorized 3Com service partners who are qualified to provide a variety of services, including network planning, installation, hardware maintenance, application training, and support services. If you contact your network supplier for assistance, have the following information ready: Diagnostic error messages A list of system hardware and software, including revision levels Details about recent configuration changes, if applicable If you are unable to contact your network supplier, refer to the following section on how to contact 3Com. Support From 3Com Corporation Support From 3Com Corporation B-5 If you are unable to receive support from your network supplier, technical support contracts are available from 3Com. Contact your local 3Com sales office to locate your authorized service provider using one of the following numbers: Regional Sales Office 3Com Corporation U.S.A. 3Com ANZA East West 3Com Asia Limited China Telephone Number 800 NET 3Com or 1 408 764 5000 61 2 9937 5000 61 3 9866 8022 Hong Kong India Indonesia Korea Malaysia Singapore Taiwan Thailand 86 10 68492 568 (Beijing) 86 21 6374 0220 Ext 6115 (Shanghai) 852 2501 1111 91 11 644 3974 62 21 523 9181 82 2 319 4711 60 3 732 7910 65 538 9368 886 2 377 5850 662 231 8151 4 3Com Benelux B.V. Belgium Netherlands 32 725 0202 31 30 6029700 3Com Canada Calgary Montreal Ottawa Toronto Vancouver 403 514 613 416 604 3Com France 33 1 69 86 68 00 3Com GmbH Austria Czech and Slovak Republics Germany Hungary Poland Switzerland 43 42 49 49 36 48 41 265 683 566 498 434 3266 3266 7055 3266 3266 1 5134323 2 21845 800 30 3498790 (Berlin) 89 627320 (Munich) 1 250 83 41 22 6451351 31 996 14 14 Regional Sales Office Telephone Number 3Com Ireland 353 1 820 7077 3Com Japan 81 3 3345 7251 3Com Latin America Argentina Brazil Chile Colombia Mexico Peru Venezuela 54 55 56 57 52 51 58 3Com Mediterraneo Italy 1 312 3266 11 546 0869 2 633 9242 1 629 4110 5 520 7841 1 221 5399 2 953 8122 39 2 253011 (Milan) 39 6 5279941 (Rome) 3Com Middle East 971 4 349049 3Com Nordic AB Denmark Finland Norway Sweden 45 39 27 85 00 358 0 435 420 67 47 22 18 40 03 46 8 632 56 00 3Com Russia 007 095 2580940 3Com South Africa 27 11 807 4397 3Com UK Limited 44 131 2478558 (Edinburgh) 44 161 8737717 (Manchester) 44 1628 897000 (Marlow) B-6 TECHNICAL SUPPORT Returning Products for Repair Before you send a product directly to 3Com for repair, you must first obtain a Return Materials Authorization (RMA) number. Products sent to 3Com without RMA numbers are returned to the sender unopened, at the sender's expense. To obtain an RMA number, call or fax: Accessing the 3Com MIB Country Telephone Number Fax Number U.S.A. and Canada 1 800 876 3266, option 2 408 764 7120 Latin America 1 408 326 7801 408 764 7120 Europe, South Africa and Middle East 44 1442 438125 44 1442 435822 Outside Europe, U.S.A., and Canada 1 408 326 7804 1 408 764 7120 The 3Com Management Information Base (MIB) describes commands that enable you to manage 3Com SNMP-based products. The MIB is available over the Internet on an anonymous FTP server. Updates to these MIBs are released as new 3Com products are introduced. To access Internet versions: 1 FTP to ftp.3com.com (151.104.9.65). 2 Enter the login name anonymous. 3 Enter your full Internet e-mail address as the password (for example, jdoe@company.com). 4 Change to the /pub/mibs directory using the command cd/pub/mibs. 5 Read the readisd.txt file to determine the MIB or MIBs you need to manage your 3Com products. 6 To view the 3Com MIB, OID, or schema entries, enter the ls command. To pause the display, press Ctrl+S. To continue the display, press Ctrl+Q. 7 Copy the MIB, OID, or schema files to your current directory using the appropriate command (for example, get isd.mib). 8 Exit the FTP session using the quit command. Contacting 3Com Technical Publications Contacting 3Com Technical Publications 02/06/97 B-7 If you have comments or questions on 3Com Technical Publications documents, contact the Technical Publications group by fax at (508) 229-1551. INDEX Numerics 120 Ohm cable specifications 2-8 3Com Bulletin Board Service (3ComBBS) B-2 3Com sales offices B-5 3Com URL B-2 3ComFacts B-3 3ComForum B-3 8-pin connector A-4 A Active Per-Module Switching Media Module 1-7 Active Per-Port Switching Media Module 1-5 Adding a new node to ring 5-5 Address-to-Port mapping 1-4 Audience of Manual 1 CompuServe B-3 Configuration media module 4-1 Configuration commands assign module 4-4 assign ports 4-4 enable ports 4-5 enable static ring switching 4-6 set network ring speed 4-3 Configuration examples 2-12 Configuration rules maximum lobe lengths 2-6, 2-7 Connections hardware 2-9 RI/RO 1-14 Connector pinouts A-4 Copper trunk ports, connecting 2-9 CoreBuilder 5000 hub hot swap capabilities 3-14 B Backbone configurations collapsed backbone 2-14, 2-15 single extended ring 2-17, 2-18 traditional backbone ring 2-12, 2-13 Backbone ring, description 2-12 Beacon recovery 1-4 enabling 4-5 threshold setting 4-6 bulletin board service B-2 C Cable lengths 2-6 calculating 2-4 recommended 2-6 selecting 2-4 Cable pinouts A-4 Cable specifications level 4 2-8 level 5 2-8 Cabling standards 2-6 Channel attenuation 2-5 Chapter descriptions 1 Collapsed backbone architecture 2-14 Collapsed backbone ring, description 2-14 D Daughter cards, installing 3-10 DIP switch location 3-7 module configuration 3-5 overview 3-5 setting 3-5 DIP switch settings network assignment 4-4 DPLL 1-3 Dual Fiber Repeater Module 1-12 Dual phase-locked loop 1-3 E Electro-static discharge precautionary procedures 3-1 Extended ring configuration, description 2-17 External jitter, reducing 1-3 F 2 INDEX Fan-out device 1-7 APM in trunk mode 1-7 fax service. See 3ComFacts FCC notice ii Fiber optic connectors A-3 Fiber trunks cables 2-9 connecting 3-18 Front panel monitoring 4-16 Front panel indicators status indicators 4-16 status LEDs 4-17 H How to unpack module 3-3 I Installation hot swap capabilities 3-14 installing the module 3-15, 3-16 quick installation chart 3-2 Intermittent errors 5-6 Internal jitter, reducing 1-3 J Jitter definition 1-3 reduction 1-2 Jitter attenuator card 1-14 installing 3-12 location 3-12 Jumper setting 3-9 L LED and network verification 4-17 Lobe cable requirements 2-7 Lobe cabling 2-6 maximum distances 2-7 UTP/Level 4 2-8 lobe lengths, maximum 2-3 M Maximum copper trunk lengths 2-7 lobe lengths 2-6, 2-7 station count 2-4 Maximum lobe lengths 2-7 Media filters 2-11 Media module features 1-1 installing 3-2, 3-14 LEDs 4-17 procedures for handling 3-1 Media module LEDs interpreting 4-17 Media modules listed 1-4 Medium Interface Connector (MIC) 2-5 MIBs 3Com B-6 Mismatch resolution 4-7 Module configurations saving 4-13 showing 4-13 Module switching 1-2 N Network 2-2 building 2-2 ring speed 4-3 selection 4-4 Network management 4-1, 4-4 commands 4-2 configuring 4-2 Network Monitor Cards, using 3-4 network supplier support B-4 New stations to a ring, adding 5-5 NVRAM 3-8 O Online technical services B-1 ONline Token Ring Bridge Module 2-12 ONline Token Ring Media Module 2-17 Orientation, jitter card 3-12 INDEX P Passive Media Module 1-10 Pinout, diagram 3-17, A-4 PLL (Phase-Locked Loop) 1-3 Port 4-12 active 1-2, 2-4 passive 2-4 retiming 1-2 Port switching 1-1 Ports 1-2 assigning 4-4 configuring 4-5 connecting trunk ports 4-12 enabling 4-5 R Retiming 1-2 returning products for repair B-6 Ring beaconing 5-6 Ring speed determining 2-2 setting 4-3 threshold 4-11 Ring-In Wire, diagram A-5 Ring-In/Ring-Out ports, connecting 3-17 Rings, moving between hub and module 4-8 backplane 4-8 isolated 4-8 S Screened twisted pair cabling 2-8 Signal to NEXT ratio 2-5 Simple Network Management Protocol (SNMP) commands B-6 Single extended ring configuration 2-17 SNMP. See Simple Network Management Protocol Specifications A-1 Active Per-Module Switching Media Module A-2 Active Per-Port Switching Media Module A-1 Jitter Attenuator Card A-3 Passive Media Module A-3 Speed detection 1-2 DIP setting 3-8 enabling 4-10 Standards, for cabling 2-6 Static ring switching, enable 4-6 Stations, maximum number 2-2, 2-4 Status LEDs troubleshooting 5-4 STP 2-7 cables 2-7 T Technical Assistance 5-8 technical support B-1 3Com URL B-2 bulletin board service B-2 fax service B-3 network suppliers B-4 product repair B-6 using CompuServe B-3 Token Ring Active Per-Module Switching Media Module 1-9 TR NMC, installing 3-10 Traditional backbone configuration 2-12, 2-13 Transmitter variation 2-5 Troubleshooting 5-5 adding a new station to a ring 5-5 general tips 5-2 ring failures 5-6 Technical Assistance 5-8 using port status LEDs 5-4 using the module status LED 5-3 Trunk cable recommendations 2-9 Trunk port jumper 3-9 Trunk ports connecting 3-17 Trunks compatibility mode 4-12 configuring 4-11 connecting to 8230 4-12 mode 4-12 Twisted pair cable pinouts A-4 connectors A-4 U Unpacking the module 3-3 Unshielded Twisted Pair level 4 cable 2-8 URL B-2 UTP cables 2-8 3 4 INDEX V Verification LEDs 4-17 network assignments 4-17 W Wiring 2-4 copper 2-4 in the wall 2-8 World Wide Web B-2 WWW B-2 3Com Corporation LIMITED WARRANTY For purposes of this warranty, the CoreBuilder 5000 Token Ring Media Module is considered an Internetworking product. HARDWARE 3Com warrants its hardware products to be free from defects in workmanship and materials, under normal use and service, for the following lengths of time from the date of purchase from 3Com or its Authorized Reseller: Internetworking products 1 year Network adapters Lifetime Ethernet stackable hubs and Unmanaged Ethernet fixed port repeaters Lifetime* (1 year if not registered) *Power supply and fans in the stackable hubs and unmanaged repeaters 1 year Other hardware products 1 year Spare parts and spares kits 90 days If a product does not operate as warranted above during the applicable warranty period, 3Com shall, at its option and expense, repair the defective product or part, deliver to Customer an equivalent product or part to replace the defective item, or refund to Customer the purchase price paid for the defective product. All products that are replaced will become the property of 3Com. Replacement products may be new or reconditioned. Any replaced or repaired product or part has a 90-day warranty or the remainder of the initial warranty period, whichever is longer. 3Com shall not be responsible for any software, firmware, information, or memory data of Customer contained in, stored on, or integrated with any products returned to 3Com for repair, whether under warranty or not. SOFTWARE 3Com warrants that the software programs licensed from it will perform in substantial conformance to the program specifications therefor for a period of 90 days from the date of purchase from 3Com or its Authorized Reseller. 3Com warrants the media containing software against failure during the warranty period. No updates are provided. 3Com's sole obligation with respect to this express warranty shall be (at 3Com's discretion) to refund the purchase price paid by Customer for any defective software products, or to replace any defective media with software which substantially conforms to 3Com's applicable published specifications. Customer assumes responsibility for the selection of the appropriate applications program and associated reference materials. 3Com makes no warranty or representation that its software products will work in combination with any hardware or applications software products provided by third parties, that the operation of the software products will be uninterrupted or error free, or that all defects in the software products will be corrected. For any third-party products listed in the 3Com software product documentation or specifications as being compatible, 3Com will make reasonable efforts to provide compatibility, except where the noncompatibility is caused by a "bug" or defect in the third party's product. STANDARD WARRANTY SERVICE Standard warranty service for hardware products may be obtained by delivering the defective product, accompanied by a copy of the dated proof of purchase, to 3Com's Corporate Service Center or to an Authorized 3Com Service Center during the applicable warranty period. Standard warranty service for software products may be obtained by telephoning 3Com's Corporate Service Center or an Authorized 3Com Service Center, within the warranty period. Products returned to 3Com's Corporate Service Center must be pre-authorized by 3Com with a Return Material Authorization (RMA) number marked on the outside of the package, and sent prepaid, insured, and packaged appropriately for safe shipment. The repaired or replaced item will be shipped to Customer, at 3Com's expense, not later than 30 days after receipt of the defective product by 3Com. WARRANTIES EXCLUSIVE IF A 3COM PRODUCT DOES NOT OPERATE AS WARRANTED ABOVE, CUSTOMER'S SOLE REMEDY FOR BREACH OF THAT WARRANTY SHALL BE REPAIR, REPLACEMENT, OR REFUND OF THE PURCHASE PRICE PAID, AT 3COM'S OPTION. TO THE FULL EXTENT ALLOWED BY LAW, THE FOREGOING WARRANTIES AND REMEDIES ARE EXCLUSIVE AND ARE IN LIEU OF ALL OTHER WARRANTIES, TERMS, OR CONDITIONS, EXPRESS OR IMPLIED, EITHER IN FACT OR BY OPERATION OF LAW, STATUTORY OR OTHERWISE, INCLUDING WARRANTIES, TERMS, OR CONDITIONS OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE, AND SATISFACTORY QUALITY. 3COM NEITHER ASSUMES NOR AUTHORIZES ANY OTHER PERSON TO ASSUME FOR IT ANY OTHER LIABILITY IN CONNECTION WITH THE SALE, INSTALLATION, MAINTENANCE, OR USE OF ITS PRODUCTS. 3COM SHALL NOT BE LIABLE UNDER THIS WARRANTY IF ITS TESTING AND EXAMINATION DISCLOSE THAT THE ALLEGED DEFECT IN THE PRODUCT DOES NOT EXIST OR WAS CAUSED BY CUSTOMER'S OR ANY THIRD PERSON'S MISUSE, NEGLECT, IMPROPER INSTALLATION OR TESTING, UNAUTHORIZED ATTEMPTS TO REPAIR OR MODIFY, OR ANY OTHER CAUSE BEYOND THE RANGE OF THE INTENDED USE, OR BY ACCIDENT, FIRE, LIGHTNING, OR OTHER HAZARD. LIMITATION OF LIABILITY TO THE FULL EXTENT ALLOWED BY LAW, 3COM ALSO EXCLUDES FOR ITSELF AND ITS SUPPLIERS ANY LIABILITY, WHETHER BASED IN CONTRACT OR TORT (INCLUDING NEGLIGENCE), FOR INCIDENTAL, CONSEQUENTIAL, INDIRECT, SPECIAL, OR PUNITIVE DAMAGES OF ANY KIND, OR FOR LOSS OF REVENUE OR PROFITS, LOSS OF BUSINESS, LOSS OF INFORMATION OR DATA, OR OTHER FINANCIAL LOSS ARISING OUT OF OR IN CONNECTION WITH THE SALE, INSTALLATION, MAINTENANCE, USE, PERFORMANCE, FAILURE, OR INTERRUPTION OF ITS PRODUCTS, EVEN IF 3COM OR ITS AUTHORIZED RESELLER HAS BEEN ADVISED OF THE POSSIBILITY OF SUCH DAMAGES, AND LIMITS ITS LIABILITY TO REPAIR, REPLACEMENT, OR REFUND OF THE PURCHASE PRICE PAID, AT 3COM'S OPTION. THIS DISCLAIMER OF LIABILITY FOR DAMAGES WILL NOT BE AFFECTED IF ANY REMEDY PROVIDED HEREIN SHALL FAIL OF ITS ESSENTIAL PURPOSE. Some countries, states, or provinces do not allow the exclusion or limitation of implied warranties or the limitation of incidental or consequential damages for certain products supplied to consumers, so the above limitations and exclusions may be limited in their application to you. This warranty gives you specific legal rights which may vary depending on local law. GOVERNING LAW This Limited Warranty shall be governed by the laws of the state of California. 3Com Corporation, 5400 Bayfront Plaza, Santa Clara, CA 95052-8145 (408) 764-5000 10/20/96