Cabletron Systems NBR-420, NBR-620, NBR-220 User Manual

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Page 1

NBR-220, NBR-420, AND NBR-620

INSTALLATION GUIDE

NBR-220 TWO PORT BRIDGE WITH LANVIEW

RESET

COM

PWR CPU

B A

NBR-420 MULTI PORT BRIDGE ROUTER WITH LANVIEW

PWR

DISPLAY RESET

COM 2 COM 1

CPU

B A

NBR-620 MULTI PORT BRIDGE ROUTER WITH LANVIEW

PWR

DISPLAY RESET

COM 2 COM 1

CPU

D C B A

RECEIVE TRANSMIT COLLISION STAND BY PORT

PORT B PORT A

T1/FT1

LNK YEL STB DSR LNK

TST RED SYN CTS TST

SYNC

BRIM-WT1

PORT F PORT E

STY LNK

PORT B PORT A

T1/FT1

LNK YEL STB DSR LNK

TST RED SYN CTS TST

SYNC

BRIM-WT1

PORT F PORT E

PWR

EPIM-A

PORT D PORT C PORT B PORT A

STY LNK

PWR

EPIM-A

PWR

EPIM-A

XMT RCV

PWR

EPIM-A

XMT RCV

PWR

EPIM-A

BRIM-A100

PWR

EPIM-A

PWR

EPIM-A

PWR

EPIM-A

1092_01

Page 2

NOTICE

Cabletron Systems reserves the right to make changes in speciﬁcations and other information contained in this document without prior notice. The reader should in all cases consult Cabletron Systems to determine whether any such changes have been made.

The hardware, ﬁrmware, or software described in this manual is subject to change without notice. IN NO EVENT SHALL CABLETRON SYSTEMS BE LIABLE FOR ANY INCIDENTAL,

INDIRECT, SPECIAL, OR CONSEQUENTIAL DAMAGES WHATSOEVER (INCLUDING BUT NOT LIMITED TO LOST PROFITS) ARISING OUT OF OR RELATED TO THIS MANUAL OR THE INFORMATION CONTAINED IN IT, EVEN IF CABLETRON SYSTEMS HAS BEEN ADVISED OF, KNOWN, OR SHOULD HAVE KNOWN, THE POSSIBILITY OF SUCH DAMAGES.



Order Number: 9031092-01 May 1996

SPECTRUM, LANVIEW, MicroMMAC Manager, EPIM, EPIM-A, EPIM-F1, EPIM-F2, EPIM-F3, EPIM-T, EPIM-X, FOT-F, FOT-F3 HubSTACK, NBR-220, NBR-420, NBR-620, SEH, SEHI

Systems, Inc. All other product names mentioned in this manual may be trademarks or registered trademarks of

their respective companies.

, and

BRIM

are registered trademarks and

, and

TMS-3

Element

are trademarks of Cabletron

FCC NOTICE

This device complies with Part 15 of the FCC rules. Operation is subject to the following two conditions: (1) this device may not cause harmful interference, and (2) this device must accept any interference received, including interference that may cause undesired operation.

NOTE:

This equipment has been tested and found to comply with the limits for a Class A digital device, pursuant to Part 15 of the FCC rules. These limits are designed to provide reasonable protection against harmful interference when the equipment is operated in a commercial environment. This equipment uses, generates, and can radiate radio frequency energy and if not installed in accordance with the operator’s manual, may cause harmful interference to radio communications. Operation of this equipment in a residential area is likely to cause interference in which case the user will be required to correct the interference at his own expense.

WARNING:

party responsible for compliance could void the user’s authority to operate the equipment.

Changes or modifications made to this device which are not e xpressly appro v ed by the

Printed on Recycled Paper

NBR-SERIES Installation Guide i

Page 3

Notice

DOC NOTICE

This digital apparatus does not exceed the Class A limits for radio noise emissions from digital apparatus set out in the Radio Interference Regulations of the Canadian Department of Communications.

Le présent appareil numérique n’émet pas de bruits radioélectriques dépassant les limites applicables aux appareils numériques de la class A prescrites dans le Règlement sur le brouillage radioélectrique édicté par le ministère des Communications du Canada.

VCCI NOTICE

This equipment is in the 1st Class Category (information equipment to be used in commercial and/or industrial areas) and conforms to the standards set by the Voluntary Control Council for Interference by Information T echnology Equipment (VCCI) aimed at preventing radio interference in commercial and/or industrial areas.

Consequently, when used in a residential area or in an adjacent area thereto, radio interference may be caused to radios and TV receivers, etc.

Read the instructions for correct handling.

CABLETRON SYSTEMS, INC. PROGRAM LICENSE AGREEMENT

IMPORTANT:

This document is an agreement between you, the end user, and Cabletron Systems, Inc. (“Cabletron”) that sets forth your rights and obligations with respect to the Cabletron software program (the “Program”) contained in this package. The Program may be contained in ﬁrmware, chips or other media. BY UTILIZING THE ENCLOSED PRODUCT, YOU ARE AGREEING TO BECOME BOUND BY THE TERMS OF THIS AGREEMENT, WHICH INCLUDES THE LICENSE AND THE LIMITATION OF WARRANTY AND DISCLAIMER OF LIABILITY. IF YOU DO NOT AGREE TO THE TERMS OF THIS AGREEMENT, PROMPTLY RETURN THE UNUSED PRODUCT TO THE PLACE OF PURCHASE FOR A FULL REFUND.

Before utilizing this product, carefully read this License Agreement.

ii NBR-SERIES Installation Guide

Page 4

Notice

CABLETRON SOFTWARE PROGRAM LICENSE

1. LICENSE

package subject to the terms and conditions of this License Agreement. You may not copy, reproduce or transmit any part of the Program except as permitted by the

2. OTHER RESTRICTIONS. You may not reverse engineer, decompile, or disassemble the

Program.

3. APPLICABLE LA W. This License Agreement shall be interpreted and governed under the laws

and in the state and federal courts of New Hampshire. You accept the personal jurisdiction and venue of the New Hampshire courts.

. You have the right to use only the one (1) copy of the Program provided in this

EXCLUSION OF WARRANTY AND DISCLAIMER OF LIABILITY

1. EXCLUSION OF

writing, Cabletron makes no warranty, expressed or implied, concerning the Program (including its documentation and media).

CABLETRON DISCLAIMS ALL WARRANTIES, OTHER THAN THOSE SUPPLIED TO YOU BY CABLETRON IN WRITING, EITHER EXPRESSED OR IMPLIED, INCLUDING BUT NOT LIMITED TO IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE, WITH RESPECT TO THE PROGRAM, THE ACCOMP ANYING WRITTEN MA TERIALS, AND ANY A CCOMP ANYING HARDWARE.

2. NO LIABILITY FOR CONSEQUENTIAL DAMAGES. IN NO EVENT SHALL

CABLETRON OR ITS SUPPLIERS BE LIABLE FOR ANY DAMAGES WHATSOEVER (INCLUDING, WITHOUT LIMITATION, DAMAGES FOR LOSS OF BUSINESS, PROFITS, BUSINESS INTERRUPTION, LOSS OF BUSINESS INFORMATION, SPECIAL, INCIDENTAL, CONSEQUENTIAL, OR RELIANCE DAMAGES, OR OTHER LOSS) ARISING OUT OF THE USE OR INABILITY TO USE THIS CABLETRON PRODUCT, EVEN IF CABLETRON HAS BEEN ADVISED OF THE POSSIBILITY OF SUCH DAMAGES. BECAUSE SOME STATES DO NOT ALLOW THE EXCLUSION OR LIMITATION OF LIABILITY FOR CONSEQUENTIAL OR INCIDENTAL DAMAGES, OR ON THE DURATION OR LIMITATION OF IMPLIED WARRANTIES, IN SOME INSTANCES THE ABOVE LIMITATIONS AND EXCLUSIONS MAY NOT APPLY TO YOU.

WARRANTY. Except as may be specifically provided by Cabletron in

UNITED STATES GOVERNMENT RESTRICTED RIGHTS

The enclosed product (a) was developed solely at private expense; (b) contains “restricted computer software” submitted with restricted rights in accordance with Section 52227-19 (a) through (d) of the Commercial Computer Software - Restricted Rights Clause and its successors, and (c) in all respects is proprietary data belonging to Cabletron and/or its suppliers.

For Department of Defense units, the product is licensed with “Restricted Rights” as deﬁned in the DoD Supplement to the Federal Acquisition Regulations, Section 52.227-7013 (c) (1) (ii) and its successors, and use, duplication, disclosure by the Government is subject to restrictions as set forth in subparagraph (c) (1) (ii) of the Rights in Technical Data and Computer Software clause at

252.227-7013. Cabletron Systems, Inc., 35 Industrial Way, Rochester, New Hampshire 03867-0505.

NBR-SERIES Installation Guide iii

Page 5

Notice

DECLARATION OF CONFORMITY

Application of Council Directive(s):

Manufacturer’s Name:

Manufacturer’s Address:

European Representative Name:

European Representative Address:

Conformance to Directive(s)/Product Standards:

Equipment T ype/Environment:

We the undersigned, hereby declare that the equipment packaged with this notice conforms to the above directives.

Manufacturer Legal Representative in Europe

89/336/EEC 73/23/EEC

Cabletron Systems, Inc. 35 Industrial Way

PO Box 5005 Rochester, NH 03867

Mr. J. Solari Cabletron Systems Limited

Nexus House, Newbury Business Park London Road, Newbury Berkshire RG13 2PZ, England

EC Directive 89/336/EEC EC Directive 73/23/EEC EN 55022 EN 50082-1 EN 60950

Networking Equipment, for use in a Commercial or Light Environment.

Industrial

Mr. Richard Michaud Mr. J. Solari

___________________________________ ___________________________________

Full Name Full Name Manager of Engineering Services Managing Director - E.M.E.A.

___________________________________ ___________________________________

Title Title Rochester, NH, USA Newbury, Berkshire, England

___________________________________ ___________________________________

Location Location

iv NBR-SERIES Installation Guide

Page 6

CHAPTER 1 INTRODUCTION

1.1 Using This Manual.......................................................................1-2

1.2 NBR Features..............................................................................1-3

1.3 Conventions Used in This Document..........................................1-6

1.4 Related Manuals..........................................................................1-6

1.5 Getting Help.................................................................................1-7

CHAPTER 2 CONTROLS AND INDICATORS

2.1 LANVIEW LEDs...........................................................................2-2

2.2 RESET Button.............................................................................2-2

2.3 LCD Display.................................................................................2-2

CHAPTER 3 INSTALLATION

3.1 Unpacking the NBR.....................................................................3-1

3.2 Preparing the NBR for Installation...............................................3-2

3.2.1 Removing Chassis Cover ...............................................3-2

3.2.2 Setting Mode Switches ...................................................3-5

3.2.3 Setting NVRAM Reset Switch......................................... 3-6

3.2.4 Installing SIMM Upgrades............................................... 3-7

3.2.4.1 Installing FLASH SIMMs ................................3-7

3.2.4.2 Installing LDRAM and SDRAM SIMMs ..........3-9

3.2.5 Adding/Replacing EPIMs................................................ 3-9

3.2.6 Adding/Replacing BRIMs..............................................3-10

3.2.7 Testing the NBR ...........................................................3-11

3.3 Installing the NBR......................................................................3-12

3.3.1 Attaching the Strain-Relief Bracket...............................3-13

3.3.2 Rack Mounting the NBR ...............................................3-14

3.3.3 Free-Standing Installation.............................................3-15

3.4 Connecting the NBR to the Power Source................................3-15

3.5 Connecting the NBR to the Network..........................................3-17

3.5.1 Connecting a Twisted Pair Segment to an EPIM-T ......3-17

3.5.2 Connecting an AUI Cable to an EPIM-X.......................3-19

3.5.3 Connecting a Fiber Optic Cable to an EPIM-F1/F2 or EPIM-F33-20

3.5.4 Connecting a Thin-Net Segment to an EPIM-C............3-22

3.5.5 Connecting an AUI Cable to an EPIM-A.......................3-23

NBR-SERIES Installation Guide v

Page 7

Contents

CHAPTER 4 TROUBLESHOOTING

4.1 Using LANVIEW...........................................................................4-1

4.2 Troubleshooting Checklist............................................................4-4

4.3 Using the LCD..............................................................................4-6

4.3.1 Unsaved Initialization Messages.....................................4-7

4.3.2 Static System Messages.................................................4-7

4.3.3 Alarm Messages..............................................................4-9

4.3.4 Saved System Messages..............................................4-10

4.3.5 Failure or Error Messages.............................................4-12

4.4 Using the RESET Button ...........................................................4-12

APPENDIX A NBR SPECIFICATIONS

A.1 Operating Specifications............................................................. A-1

A.2 COM Port Pinouts....................................................................... A-2

A.3 Physical Properties ..................................................................... A-3

A.4 Environmental Requirements...................................................... A-3

A.5 Certification................................................................................. A-3

A.6 Power Supply Requirements ...................................................... A-3

APPENDIX B EPIM SPECIFICATIONS

B.1 EPIM Specifications.................................................................... B-1

B.2 EPIM-T........................................................................................B-1

B.3 EPIM-F1/F2................................................................................. B-2

B.4 EPIM-F3......................................................................................B-3

B.5 EPIM-C ....................................................................................... B-5

B.6 EPIM-A and EPIM-X ................................................................... B-6

APPENDIX C NETWORK PLANNING AND CONFIGURATION

C.1 Network Cable Requirements .....................................................C-1

C.1.1 10BASE-T Twisted Pair Network....................................C-1

C.1.2 Multimode Fiber Optic Network ......................................C-3

C.1.3 Single Mode Fiber Optic Network...................................C-4

C.1.4 Thin-Net Network............................................................C-5

C.2 Transceiver Requirements..........................................................C-6

C.3 The NBR as a Multiport Router...................................................C-6

C.4 The NBR-420/NBR-620 and BRIMs ........................................... C-6

vi NBR-SERIES Installation Guide

Page 8

Contents

APPENDIX D ADDITIONAL INFORMATION

D.1 NBR Overview.............................................................................D-1

D.2 Ethernet Channels A, B, C, and D...............................................D-2

D.3 Channels E and F........................................................................D-2

D.4 Bridging Functionality ..................................................................D-3

INDEX

NBR-SERIES Installation Guide vii

Page 9

CHAPTER 1

INTRODUCTION

The Cabletron Systems NBR-SERIES of

(NBR-220, NBR-420, NBR-620)

provide bridging and routing solutions

Network Bridge Routers

for Ethernet, token ring, FDDI, ATM, or wide area networks. The NBR-SERIES of standalone hubs consist of the following three models:

NBR-220

•

NBR-420

– two Ethernet Port Interface Module (EPIM) ports

– two EPIM ports, and two Bridge/Router Interface Module

(BRIM) ports

•

NBR-620 –

NBR-220

TWO PORT BRIDGE

RESET

NBR-420

MULTI PORT BRIDGE ROUTER

DISPLAY RESET

NBR-620

MULTI PORT BRIDGE ROUTER

DISPLAY RESET

COM

COM 2 COM 1

four EPIM ports, and two BRIM ports

WITH

LANVIEW

RECEIVE TRANSMIT

PWR

COLLISION

CPU

STAND BY PORT

B A

LANVIEW

B A

LANVIEW

RECEIVE TRANSMIT COLLISION STAND BY PORT

T1/FT1

LNK YEL STB DSR LNK

TST RED SYN CTS TST

T1/FT1

LNK YEL STB DSR LNK

TST RED SYN CTS TST

WITH

PWR CPU

WITH

PWR CPU

D C B A

SYNC

BRIM-WT1

PORT F PORT E

SYNC

BRIM-WT1

PORT F PORT E

PWR

EPIM-A

PORT D PORT C PORT B PORT A

PWR

EPIM-A

PWR

EPIM-A

PORT B PORT A

STY

XMT

LNK

RCV

PWR

EPIM-A

PORT B PORT A

STY

XMT

LNK

RCV

PWR

EPIM-A

BRIM-A100

EPIM-A

BRIM-A100

EPIM-A

1092_01

PWR

Figure 1-1 The NBR-SERIES of Network Products

This manual uses the term NBR to describe the NBR-220,

NOTE

NBR-420, and NBR-620 unless otherwise speciﬁed.

NBR-SERIES Installation Guide Page 1-1

Page 10

Chapter 1:

Introduction

This manual explains the following:

• Installing the NBR

• Connecting the NBR to an existing network

• Testing the NBR

• Troubleshooting any installation/operational problems In addition, Appendices contain NBR and Ethernet Port Interf ace Module

(EPIM) environmental and operational speciﬁcations. This manual serves as a simple installation and troubleshooting reference

guide for the NBR. For information regarding NBR out-of-band management, refer to the

Management Guide

NBR-220, NBR-420, and NBR-620 Local

T o gain a full understanding of this device and its capabilities, and to help eliminate any potential problems during or after installation, please be sure to read and understand all of the instructions/information in this document and in the release notes supplied with your NBR.

1.1 USING THIS MANUAL

You should have a general working kno wledge of Ethernet or IEEE 802.3 type data networks and their physical layer components, prior to installing the NBR. The following summarizes the organization of this manual.

Chapter 1,

Introduction

product features, document conventions, related documents, and how to get help.

Chapter 2,

Controls and Indicators,

indicators for the NBR. Chapter 3,

Installation,

NBR, perform pre-installation testing, install the NBR, and connect the NBR to the network.

Chapter 4,

Troubleshooting

procedures for the NBR and a checklist to enable the user to troubleshoot problems using LANVIEW LEDs.

Page 1-2 NBR-SERIES Installation Guide

, provides instructions for using this manual,

discusses the controls and

provides instructions required to unpack the

, provides detailed troubleshooting

Page 11

NBR Features

Appendix A,

NBR Specifications

, provides the physical properties, environmental operating requirements, agency approvals, and power requirements.

Appendix B,

EPIM Specifications

, details the speciﬁcations for the

EPIMs that may be used with the NBR. Appendix C,

Network Planning and Configuration

, provides

information on network cable requirements. Appendix D,

Additional Information

, provides an NBR overview and

bridging functionality.

1.2 NBR FEATURES

LANVIEW LEDs

Cabletron Systems provides a visual diagnostic and monitoring system, called LANVIEW, with the NBR. LANVIEW LEDs help you quickly identify device, port, and physical layer problems.

LCD

The NBR-420 and NBR-620 are equipped with an LCD that provides information about the NBR such as power up diagnostics, revision levels, MAC and IP addresses, and error alerts.

RESET Button

The RESET button lets you re-boot and initialize the processor.

Intelligence

The NBR is equipped with an advanced Intel i960 microprocessor to provide a scalable RISC-based architecture.

Hardware Bridging Logic

The NBR uses hardware packet ﬁlter/forward logic to increase bridging performance.

Connectivity

The NBR-220 and the NBR-420 have two Ethernet ports (A and B channels) and the NBR-620 has four Ethernet ports (A, B, C, and D channels). These ports provide external connections through Ethernet Port Interface Modules (EPIMs) located on the NBR faceplate.

NBR-SERIES Installation Guide Page 1-3

Page 12

Chapter 1:

Bridging/Routing

Introduction

The NBR-420 and NBR-620 can support two optional Bridge/Router Interface Modules (BRIMs). These modules allow for additional Ethernet connections, W ide Area (Full or Fractional T1; 56k DDS) access, or links to existing high-speed network backbones such as Asynchronous T ransfer Mode (ATM) or Fiber Distributed Data Interface (FDDI).

Memory

The NBR comes with 4 Megabytes (MB) of Shared Dynamic Random Access Memory (SDRAM), 8 MB of Local Dynamic Random Access Memory (LDRAM), and 2 MB of FLASH Electrically Erasable Programmable Read Only Memory (FLASH EEPROM). In addition, the NBR motherboard provides the option of upgrading memory capacity by using Single In-line Memory Modules (SIMMs).

In order to fully use Remote Monitoring (RMON), it is necessary to upgrade local memory with an 8 MB SIMM. Without this upgrade, some RMON groups may not be available.

NOTE

DLM

For information on how to order SIMM upgrade packages, contact Cabletron Systems Technical Support.

The NBR allows the option of using Cabletron Systems Distributed LAN Monitor (DLM) software to locally poll and monitor any Simple Network Management Protocol (SNMP) or Internet Protocol (IP) device.

Management Information Base (MIB) Support

The NBR provides IETF MIB support, which includes the following:

• Cabletron Systems Enterprise MIBs

• Remote Monitoring MIB (RMON)

• Bridge MIB

• MIBII

Page 1-4 NBR-SERIES Installation Guide

Page 13

NBR Features

MIB Navigation

NBR ﬁrmware supports a management tool which allows for MIB navigation from a remote station. Refer to the

NBR-620 Local Management Guide

for more information regarding MIB

NBR-220, NBR-420, and

navigation.

Spanning Tree Protocol Support

The NBR supports the following spanning tree protocols:

• 802.1d

• DECnet

Serial Connections/Local Management

The NBR-220 provides one RJ45 port (COM) for serial connections and the NBR-420 and NBR-620 provide two RJ45 ports (COM 1 and COM 2). These ports allow you to access Local Management by locally connecting a DEC VT220 or VT320 terminal, or a PC using VT

your

emulation software. Refer to

Local Management Guide

for additional information on how to use Local

NBR-220, NBR-420, and NBR-620

Management. In addition, any of the COM ports can be used as an Uninterruptible Power Supply (UPS) management port.

NBR-SERIES Installation Guide Page 1-5

Page 14

Chapter 1:

Introduction

1.3 CONVENTIONS USED IN THIS DOCUMENT

The following conventions are used throughout this document:

Note

NOTE

TIP

CAUTION

symbol. Calls the reader’s attention to any item of

information that may be of special importance.

Tip

symbol. Conveys helpful hints concerning procedures or

actions.

Caution symbol. Contains information essential to avoid damage to the equipment.

Warning symbol. Warns against an action that could result in equipment damage, personal injury or death.

1.4 RELATED MANUALS

Use the following manuals to supplement the procedures and other technical data provided in this manual. This manual references procedures in these manuals, where appropriate, but does not repeat them.

Cabletron Systems

Management Guide

Cabletron Systems Cabletron Systems

Page 1-6 NBR-SERIES Installation Guide

NBR-220, NBR-420, and NBR-620 Local

BRIM User’s Guide(s) Routing Services Conﬁguration Guide

Page 15

Getting Help

1.5 GETTING HELP

If you need additional support related to this device, or if you have any questions, comments, or suggestions concerning this manual, contact Cabletron Systems Technical Support:

By phone (603) 332-9400

Monday – Friday; 8 By CompuServe GO CTRON from any ! prompt By Internet mail support@ctron.com By FTP ctron.com (134.141.197.25)

Before calling Cabletron Systems Technical Support, have the following information ready:

• Description of the failure

• Description of any action(s) already taken to resolv e the problem (e.g.,

changing mode switches, rebooting the unit, etc.)

• Description of your network environment (layout, cable type, etc.)

A.M. – 8 P.M. Eastern T ime

• Network load and frame size at the time of trouble (if known)

• Serial and revision numbers of all Cabletron Systems products in the

NBR network

• Device history (i.e., have you returned the device before, is this a

recurring problem, etc.)

• Any previous Return Material Authorization (RMA) numbers

NBR-SERIES Installation Guide Page 1-7

Page 16

CHAPTER 2

CONTROLS AND INDICATORS

This chapter provides descriptions of the controls and indicators of the Network Bridge Routers (NBR-220, NBR-420, NBR-620). The models are as follows:

• NBR-220 – two Ethernet Port Interface Module (EPIM) ports

• NBR-420 – two EPIM ports, and two Bridge/Router Interface Module

(BRIM) ports

• NBR-620 – four EPIM ports, and two BRIM ports

NBR-220

NBR-420

DISPLAY RESET

NBR-620

DISPLAY RESET

TWO PORT BRIDGE

RESET

COM

MULTI PORT BRIDGE ROUTER

COM 2 COM 1

MULTI PORT BRIDGE ROUTER

COM 2 COM 1

WITH

LANVIEW

RECEIVE TRANSMIT

PWR

COLLISION

CPU

STAND BY PORT

B A

LANVIEW

B A

LANVIEW

RECEIVE TRANSMIT COLLISION STAND BY PORT

T1/FT1

LNK YEL STB DSR LNK

TST RED SYN CTS TST

T1/FT1

LNK YEL STB DSR LNK

TST RED SYN CTS TST

WITH

PWR CPU

WITH

PWR CPU

D C B A

SYNC

BRIM-WT1

PORT F PORT E

SYNC

BRIM-WT1

PORT F PORT E

PWR

EPIM-A

PORT D PORT C PORT B PORT A

EPIM-A

Figure 2-1 The NBR-SERIES of Network Products

PORT B PORT A

STY LNK

PORT B PORT A

STY LNK

PWR

EPIM-A

XMT RCV

PWR

EPIM-A

XMT RCV

PWR

EPIM-A

BRIM-A100

EPIM-A

1092_01

PWR

NBR-SERIES Installation Guide Page 2-1

Page 17

Chapter 2: Controls and Indicators

2.1 LANVIEW LEDs

The NBR-220, NBR-420, and NBR-620 incorporate the Cabletron Systems LANVIEW status monitoring and diagnostics system. LANVIEW LEDs help diagnose problems, such as a power failure or a cable fault. Each NBR includes the following LANVIEW LEDs:

• A CPU LED, for board status

• RECEIVE, TRANSMIT, COLLISION, and STAND BY LEDs for each Ethernet port

• A PWR LED for power status

2.2 RESET BUTTON

The front panel also has a RESET button that allows you to re-initialize the processor. Chapter 4, Troubleshooting, provides detailed descriptions of each NBR LANVIEW LED.

2.3 LCD DISPLAY

The NBR-420 and NBR-620 are equipped with an LCD Display located on the front panel. The LCD provides status information about the present as well as past condition of the hub. You can view power up diagnostics, ﬁrmware revisions, MAC addresses, IP addresses, and alarm messages. The LCD displays the most current event, but can store up to 25 past events in memory. To access stored messages, press the DISPLAY button located on front panel of the NBR. Refer to Chapter 4, Troubleshooting, for detailed information.

Page 2-2 NBR-SERIES Installation Guide

Page 18

CHAPTER 3

INSTALLATION

This chapter contains the following procedures:

• Unpacking the NBR

• Preparing the NBR for installation

• Installing the NBR

• Connecting the NBR to the power source

• Connecting the NBR to the network

Only qualiﬁed personnel should perform installation procedures.

3.1 UNPACKING THE NBR

Unpack the NBR as follows:

1. Remove the packing material covering the NBR.

2. Carefully remove the NBR from the shipping box.

3. Visually inspect the NBR. If there are any signs of damage, contact

Cabletron Systems Technical Support immediately.

NBR-SERIES Installation Guide Page 3-1

Page 19

Chapter 3: Installation

3.2 PREPARING THE NBR FOR INSTALLATION

This section contains the following procedures:

• Removing chassis cover

• Setting mode switches

• Setting NVRAM reset switch

• Installing SIMM upgrades

• Installing FLASH SIMMs

• Installing LDRAM and SDRAM SIMMs

• Adding/replacing EPIMs

• Adding/replacing BRIMs

• Testing the NBR

3.2.1 Removing Chassis Cover

This section describes how to remove the chassis cover from the NBR. Remove the chassis cover to install BRIMs, set the mode switch bank, and install SIMM memory upgrades.

Do not remove the cover from the NBR while power is applied to the unit.

Do not power up the unit, for any reason, until the cover and screws are in place. Hazardous voltages are present that could cause damage to the unit or personal injury.

The components and boards associated with the NBR are sensitive to static discharges. Be sure to use an antistatic wrist

CAUTION

Page 3-2 NBR-SERIES Installation Guide

strap and observe all static precautions during this procedure. Failure to do so could result in damage to the NBR.

Page 20

Preparing the NBR for Installation

To remove the chassis cover, perform the following steps (see Figure 3-1):

1. Disconnect the NBR from the network as follows:

a. Disconnect the power cord from the rear of the NBR. b. Disconnect all network cables attached to the NBR. Note the ports

to which these cables attach.

2. Use a Phillips-head screwdriver to remove the seven screws that attach

the chassis cover to the NBR. Place the screws aside.

Remove the chassis cover from the NBR.

Chassis Cover

Chassis

Cover Screw

1092_06

Figure 3-1 Removing the Chassis Cover

Figure 3-2 shows the top view of the NBR with the co ver remo ved. It also shows the location of the mode switch bank, LDRAM slot, SDRAM slot, FLASH slot, NVRAM reset switch, and BRIM Ports.

NBR-SERIES Installation Guide Page 3-3

Page 21

Chapter 3: Installation

FLASH

LDRAM

MODE SWITCH BANK

OFF ON 1 2 3 4 5 6 7 8

Cabletron Use Only Cabletron Use Only Cabletron Use Only Cabletron Use Only

Baud Rate Default Switch (Off=9600, On=2400) Forced Download Switch (This switch forces image file downloads.)

Cabletron Use Only Password Default Switch (This switch clears passwords

stored in NVRAM.)

SDRAM

BRIM (PORT F)

1092_07

BRIM (PORT E)

NVRAM RESET SWITCH

NBR FRONT PANEL

Figure 3-2 Switch, BRIM, and SIMM Locations

Page 3-4 NBR-SERIES Installation Guide

Page 22

Preparing the NBR for Installation

3.2.2 Setting Mode Switches

Never adjust switch settings while the NBR has power applied to it. Not only is this dangerous, but the change in position activates the switch function and after you reinstall or power cycle the NBR it will initiate the request.

Figure 3-2 shows the location and factory default settings of the mode switches. Check these switches to ensure that they are in the correct position for normal NBR operation.

Switch deﬁnitions are as follows:

• Switch 1 - Cabletron Systems use only.

• Switch 2 - Cabletron Systems use only.

• Switch 3 - Cabletron Systems use only.

• Switch 4 - Cabletron Systems use only.

• Switch 5 - Baud Rate Default. Allo ws you to set the Console port baud

rate. The OFF position sets the baud rate to 9600. The ON position sets the baud rate to 2400. The default position is OFF.

Do not change the state of Switch 6 unless the following conditions exist:

CAUTION

You have a station acting as a BOOTP server, and a TFTP server that contains the NBR image ﬁle. The BOOTP server and the TFTP server could be different servers.

You intend to set up a station to act as a BOOTP server for the NBR.

• Switch 6 - Forced Download. Changing the state of this switch (i.e., moving the switch from one position to another) forces the NBR to download an image ﬁle from the station acting as the TFTP server.

NBR-SERIES Installation Guide Page 3-5

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Chapter 3: Installation

After changing the state of this switch, and repowering the device, the NBR requests a new image until it either receives a new image, or you reset the NBR again by using the RESET button on the front panel.

After resetting the NBR, the device attempts to locate a BOOTP server again. However, the BOOTP request times out after about one minute, and the NBR boots from FLASH memory.

• Switch 7 - Cabletron Systems use only.

Do not change the state of Switch 8 unless you want to reset the NBR user-conﬁgured passwords to their factory default

CAUTION

• Switch 8 - Password Def aults. Changing the state of this switch clears

settings.

user-entered passwords stored in NVRAM, and restores default passwords. Once you reset the NBR, you can use the defaults or re-enter your passwords.

3.2.3 Setting NVRAM Reset Switch

Do not change the state of the NVRAM switch unless you intend to reset the NBR user parameters to the factory default

CAUTION

Figure 3-2 shows the location of the NVRAM reset switch. The NBR uses NVRAM (Non-Volatile Random Access Memory) to store user entered parameters such as IP address, device name, etc. Changing the state of this switch (i.e., moving the switch from one position to another) resets these parameters to the factory defaults.

After changing the state of the NVRAM reset switch, press the RESET button to use the factory defaults or to re-enter your own parameters. These parameters are stored in NVRAM when the NBR is powered down, and remain there until the NVRAM switch is changed again.

Page 3-6 NBR-SERIES Installation Guide

settings.

Page 24

Preparing the NBR for Installation

3.2.4 Installing SIMM Upgrades

The NBR allows memory upgrades for FLASH Electrically Erasable Programmable Read only Memory (FLASH EEPROM), Shared Dynamic Random Access Memory (SDRAM), and Local Dynamic Random Access Memory (LDRAM). This section explains how to locate and add or replace a Single In-line Memory Module (SIMM) for any of these memory types.

NOTE

For additional information on SIMMs, contact Cabletron Systems Technical Support.

Each memory type has a speciﬁc SIMM slot location on the NBR motherboard. See Figure 3-2 for SIMM slot location. When installing SIMM boards, make sure that you place them in their proper slots.

3.2.4.1 Installing FLASH SIMMs

Installing a FLASH SIMM is a two step process. Refer to Figure 3-3 and perform the following steps to install your FLASH SIMM.

NBR-SERIES Installation Guide Page 3-7

Page 25

Chapter 3: Installation

IMM Slot

Connector

Teeth

SIMM

Figure 3-3 Installing a FLASH SIMM

Install a FLASH SIMM as follows:

Clips

SIMM Slot

Post

SIMM Hole

1092_08

The components and boards associated with the NBR are sensitive to static discharges. Be sure to use an antistatic wrist

CAUTION

strap and observe all static precautions during this procedure. Failure to do so could result in damage to the NBR.

1. Insert the SIMM between the connector teeth in the SIMM slot.

2. Pivot the SIMM back until it locks into the clips in the SIMM slot, and the SIMM holes fit over the SIMM slot posts.

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Preparing the NBR for Installation

3.2.4.2 Installing LDRAM and SDRAM SIMMs

To install an LDRAM or SDRAM SIMM, see Figure 3-4 and the steps below.

SIMM

SIMM Hole

Connector

Teeth

SIMM Slot

Connector Clip

Figure 3-4 Installing an LDRAM or SDRAM SIMM

SIMM Slot

Post

1092_09

Install an LDRAM or SDRAM SIMM as follows:

The components and boards associated with the NBR are sensitive to static discharges. Be sure to use an antistatic wrist

CAUTION

strap and observe all static precautions during this procedure. Failure to do so could result in damage to the NBR.

1. Insert the SIMM between the connector teeth in the SIMM slot.

2. Pivot the SIMM back until it locks into the clips in the SIMM slot, and

the SIMM holes fit over the SIMM slot posts.

3.2.5 Adding/Replacing EPIMs

This section contains procedures on how to add/replace an Ethernet Port Interface Module (EPIM) to upgrade or change the capabilities of your hub. See Figure 3-5. After installing your new EPIM, refer to appropriate EPIM sections in this chapter for connecting media types and to verify proper operation.

NBR-SERIES Installation Guide Page 3-9

Page 27

Chapter 3: Installation

The components and boards associated with the NBR are sensitive to static discharges. Be sure to use an antistatic wrist

CAUTION

strap and observe all static precautions during this procedure. Failure to do so could result in damage to the NBR.

Install an EPIM as follows:

When removing an EPIM, make sure to pull the module straight out. Failure to do so could result in damage to the connector.

CAUTION

1. Remove the coverplate or the EPIM (whichever applies).

2. Slide your new EPIM into place, making sure the connectors on the rear of the module and inside the HUB attach properly.

3. Fasten the EPIM to the NBR using the mounting screws.

LNK

EPIM-T

Port A

Port B

LNK

EPIM-T

1092_10

Figure 3-5 Installing an EPIM

3.2.6 Adding/Replacing BRIMs

To add or replace Bridge/Router Interface Modules (BRIMs) in the NBR-420 and NBR-620, refer to the applicable BRIM User’s Guide.

Page 3-10 NBR-SERIES Installation Guide

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Preparing the NBR for Installation

3.2.7 Testing the NBR

Before installing the NBR in a live network, test the hub in a controlled situation to ensure that it is bridging packets. Perform this test with two workstations (see Figure 3-6), as follows:

1. Connect the first workstation to an NBR EPIM or BRIM.

2. Connect the second workstation to an NBR EPIM or BRIM.

3. Assign a valid IP address to the NBR using Local Management.

4. Designate the first workstation as a file server and the second one as

the client. Refer to the workstation manuals for establishing one as a file server and one as a client.

5. Send packets between the two workstations to verify the proper

operation of the NBR.

NOTE

A “ping” test of the other workstation veriﬁes the NBR is operating properly.

If a failure occurs, see Chapter 4 for troubleshooting instructions.

NBR-SERIES Installation Guide Page 3-11

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Chapter 3: Installation

NBR-620 MULTI PORT BRIDGE ROUTER

Figure 3-6 Installation Check-out

T1/FT1

WITH

LANVIEW

SYNC

LNK YEL STB DSR LNK

TST RED SYN CTS TST

BRIM-WT1

PWR

EPIM-A

PORT D PORT C PORT B PORT A

PORT F PORT E

PWR

EPIM-A

STY

XMT

LNK

RCV

EPIM-A

BRIM-A100

PWR

EPIM-A

1092_11

3.3 INSTALLING THE NBR

You can install the NBR on any horizontal surface. In addition, Cabletron Systems provides an accessory kit with the NBR that includes hardware to install the NBR in a 19-inch rack. Select one of the following subsections and perform the steps that are applicable for your installation.

If you decide not to install the NBR in a 19-inch rack, the following requirements must be met when selecting a location:

NOTE

• An unrestricted free surface area at least 21 inches wide, 18 inches

• A single phase, grounded power receptacle must be located within

Page 3-12 NBR-SERIES Installation Guide

Ensure that you select a location within reach of the network cabling.

deep and 6 inches high is needed.

7 feet of the site.

Page 30

Installing the NBR

• If a shelving unit is to be used, it must be able to support 30 pounds

(13.6 kg) of static weight.

• The temperature for the selected location must be maintained between

5° and 40°C, and less than 10°C per hour temperature change.

3.3.1 Attaching the Strain-Relief Bracket

Attach the strain-relief bracket to the front of the NBR as follows:

1. Remove the strain-relief bracket and four 8-32 x 3/8-inch screws from

the NBR installation kit.

Use only the appropriate screws to attach the strain relief. Use of longer screws may cause damage to the unit or electrical shock.

2. Attach the strain-relief bracket to the bottom of the NBR as shown in

Figure 3-7.

Strain-Relief

Bracket

NBR-620 MULTI PORT BRIDGE ROUTER WITH LANVIEW

PORT F PORT E

PORT D PORT C PORT B PORT A

Strain-Relief

Screws (4)

1092_12

Figure 3-7 Attaching the Strain-Relief Bracket

NBR-SERIES Installation Guide Page 3-13

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Chapter 3: Installation

3.3.2 Rack Mounting the NBR

Install the NBR in a 19-inch rack as follows:

1. Remove four cover screws (two from each side) located along the front edges of each side of the NBR. See Figure 3-8.

2. Using the four 6-32 x 3/8-inch replacement flathead screws, attach the rack mounting brackets to each end of the NBR.

Rack Mounting

Brackets (2)

NBR-620

MULTI PORT BRIDGE ROUTER

WITH

LANVIEW

PORT D PORT C PORT B PORT A

PORT F PORT E

1092_02

Screws (4)

Figure 3-8 Rackmount Brackets Installation

3. With the mounting brackets attached, position the NBR between the vertical frame members of the 19-inch rack and fasten it securely with the mounting screws. See Figure 3-9.

19-Inch Rack

NBR-620

MULTI PORT BRIDGE ROUTER

WITH

LANVIEW

PORT F PORT E

PORT D PORT C PORT B PORT A

Screws (4)

1092_13

Figure 3-9 Installing the NBR in the Rack

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Page 32

Connecting the NBR to the Power Source

3.3.3 Free-Standing Installation

For a free-standing shelf or tabletop installation, locate the NBR within 7 feet of its power source and with an unrestricted free surface area 21 inches wide, 18 inches deep and 6 inches high, as shown in Figure 3-10.

21 IN.

PORT F PORT E

PORT D PORT C PORT B PORT A

7 FT.

6 IN.

18 IN.

NBR-620

MULTI PORT BRIDGE ROUTER

WITH

LANVIEW

Figure 3-10 Free-Standing Installation

3.4 CONNECTING THE NBR TO THE POWER SOURCE

NOTE

Connect the NBR to the power source as follows:

1. Plug the power cord into a grounded wall outlet.

The NBR has a universal power supply. This allows you to connect the NBR to power sources from 100 Vac to 125 Vac or 200 Vac to 250 Vac, 50/60 Hz.

NOTE

booting, the NBR displays boot-up diagnostics through Local Management. Refer to the

Local Management Guide

NBR-220, NBR-420, and NBR-620

for additional information on how to

connect and conﬁgure a Local Management console.

NBR-SERIES Installation Guide Page 3-15

It may take several minutes for the NBR to boot up. While

Page 33

Chapter 3: Installation

2. Observe the status of the LANVIEW LEDs on the NBR. When the CPU LED is flashing, the STAND BY LEDs indicate the boot state of the NBR. During this period (up to 5 minutes), the LEDs cycle through a series of internal diagnostics. Figure 3-11 shows the LEDs.

LANVIEW LEDs

1092_03

NBR-620 MULTI PORT BRIDGE ROUTER WITH LANVIEW

PWR

DISPLAY RESET

COM 2 COM 1

CPU

RECEIVE TRANSMIT COLLISION STAND BY PORTD C B A

Figure 3-11 NBR LANVIEW LEDs

After the system boot procedure, the LEDs should be in the following conditions:

• PWR LED on, indicating that the NBR is receiving power.

• CPU LED ﬂashing green, indicating proper NBR operation.

• STAND BY (A, B, C, D) LEDs ON or OFF, depending on the port’s position in the Spanning Tree Algorithm.

• Appropriate EPIM/BRIM LEDs ON:

- Refer to Section 3.5, Connecting the NBR to the Network, for

appropriate LED status for individual EPIMs.

- Refer to individual BRIM Guides for BRIM LED status.

Page 3-16 NBR-SERIES Installation Guide

Page 34

Connecting the NBR to the Network

3.5 CONNECTING THE NBR TO THE NETWORK

This section gives procedures for connecting the NBR to the network using the various EPIMs available.

Once you have successfully powered up your NBR, you can add network connections. The procedure for connecting Ethernet segments to a hub varies depending on the media and ports you connect. Refer to the following list and perform the procedure described in the subsection(s) that apply to your hub:

EPIM-T 3.5.1 EPIM-X 3.5.2 EPIM-F1, F2, F3 3.5.3 EPIM-C 3.5.4 EPIM-A 3.5.5

3.5.1 Connecting a Twisted Pair Segment to an EPIM-T

Before connecting a segment to the EPIM-T, check each end of the segment to determine wire crossover. If the wires do not cross over, use the switch on the EPIM-T to internally cross over the RJ45 port. Refer to Figure 3-12 to properly set the EPIM-T crossover switch.

Position X (crossed over)

1. RX+

2. RX-

3. TX+

4. NC

5. NC

6. TX-

7. NC

8. NC Position =

(not crossed over)

1. TX+

2. TX-

3. RX+

4. NC

Figure 3-12 EPIM-T Crossover Switch

5. NC

6. RX-

7. NC

8. NC

1092_14

NBR-SERIES Installation Guide Page 3-17

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Chapter 3: Installation

Connect an EPIM-T to a Twisted Pair Segment as follows:

1. Connect the twisted pair segment to the module by inserting the RJ45 connector on the twisted pair segment into the RJ45 port on the module. See Figure 3-12.

2. Check that the LNK LED for the port is on. If the LED is not on, perform each of the following steps until it is:

a. Check that the 10BASE-T device at the other end of the twisted

pair segment is powered.

b. Verify that the RJ45 connectors on the twisted pair segment have

the proper pinouts. Figure 3-13 shows the RJ45 pinouts.

10BASE-T Device

Port

RX+

RX–

TX+

TX–

1574-30

NOTE: RX+/RX– and TX+/TX– must share a common color pair.

Figure 3-13 Cable Pinouts - EPIM-T RJ45 Port

EPIM-T

RJ45 Port RX+ RX– 2

TX+ TX–

3 6

RJ-45 to RJ-45

c. Check the cable for continuity. d. Check that the twisted pair connection meets dB loss and cable

specifications outlined in Section C.1.1, 10BASE-T Twisted Pair Network.

If you still cannot establish a link, contact Cabletron Systems Technical Support.

Page 3-18 NBR-SERIES Installation Guide

Page 36

Connecting the NBR to the Network

3.5.2 Connecting an AUI Cable to an EPIM-X

The signal quality error (SQE) switch remains in the OFF position for most network connections. However, some Data

CAUTION

Connect an EPIM-X to a device not requiring SQE as follows:

1. Check that the SQE LED on the EPIM-X is OFF. If the SQE LED is

Terminal Equipment (DTE) requires SQE. Refer to your DTE manual for SQE requirement information.

ON, check the position of the SQE switch.

NOTE

the OFF position, contact Cabletron Systems Technical Support.

2. Attach one end of an AUI cable, no longer than 50 meters in length, to the port located on the EPIM-X (Figure 3-14) and the other end to the intended node.

If the SQE light remains on, even though the SQE switch is in

ON Position (Toward Back of EPIM)

OFF Position (Toward Front of EPIM)

OFF

1092_16

Figure 3-14 The EPIM-X

NBR-SERIES Installation Guide Page 3-19

Page 37

Chapter 3: Installation

3.5.3 Connecting a Fiber Optic Cable to an EPIM-F1/F2 or EPIM-F3

When connecting a ﬁber optic link segment to an EPIM-F1/F2 or EPIM-F3 keep the following in mind:

A full alignment sleeve damages the receive port. SMA 905 connectors do not need alignment sleeves.

CAUTION

• When connecting a ﬁber optic link segment with SMA 906 connectors

to an EPIM-F1 with SMA ports, make sure each connector uses half alignment, NOT full alignment sleeves.

• When connecting a ﬁber optic link segment with ST connectors to an

EPIM-F2 with ST ports, keep in mind that ST connectors attach to ST ports. Insert the connector into the port with the alignment key on the connector inserted into the alignment slot on the port. Turn the connector to lock it down.

• The physical communication link consists of two strands of ﬁber optic

cabling: the Transmit (TX) and the Recei ve (RX). The Transmit strand from a module port connects to the Receive port of a ﬁber optic Ethernet device at the other end of the segment (i.e., TX of the applicable port on the module goes to RX of the other ﬁber optic device). The Receive strand of the applicable port on the module connects to the Transmit port of the ﬁber optic Ethernet device (i.e., RX of the applicable port on the module goes to TX of the other ﬁber optic device).

• W e recommend that you label the ﬁber optic cables to indicate Recei ve

and Transmit ends. Cabletron Systems prelabels its cable. At one end of the cable, one ﬁber is labeled 1, and the other ﬁber is labeled 2. This pattern repeats at the other end of the cable. If you did not purchase your cable from Cabletron Systems, be sure to label your cable in this manner.

Page 3-20 NBR-SERIES Installation Guide

Page 38

Connecting the NBR to the Network

Do not touch the ends of the ﬁber optic strands, and do not let the ends come in contact with dust, dirt, or other contaminants.

CAUTION

Contamination of cable ends causes problems in data transmissions. If necessary, clean contaminated cable ends using alcohol and a soft, clean, lint-free cloth.

Connect a ﬁber optic link segment to an EPIM-F1/F2 or an EPIM-F3 as follows:

1. Remove the protective plastic covers from the fiber optic ports on the applicable port on the module, and from the ends of the connectors on each fiber strand.

2. Attach the fiber labeled 1 to the applicable receive port, labeled RX, on the module (Figure 3-15).

F1/F2

ST Connectors

F1/F2

SMA 906 Connectors w/

Half Alignment Sleeves

SMA 905 Connectors

ST Connectors

1092_17

Figure 3-15 The EPIM-F1/F2 and EPIM-F3

NBR-SERIES Installation Guide Page 3-21

Page 39

Chapter 3: Installation

3. Attach the fiber labeled 2 to the applicable transmit port labeled TX, on the module.

4. At the other end of the fiber optic cable, attach the fiber labeled 1 to the transmit port of the device.

5. Attach the fiber labeled 2 to the receive port.

6. Check that the LNK LED on the applicable module port is on. If the LED is not on, perform each of the following steps until it is:

a. Check that the device at the other end of the link is on. b. Verify proper “crossover” of fiber strands between the applicable

port on the module and the fiber optic device at the other end of the fiber optic link segment.

c. Verify that the fiber connection meets the dB loss specifications

outlined in Section C.1.2, Multimode Fiber Optic Network.

If you still cannot establish link, contact Cabletron Systems Technical Support.

3.5.4 Connecting a Thin-Net Segment to an EPIM-C

Connect a thin-net segment to an EPIM-C as follows:

1. Set the Internal Termination Switch (see Figure 3-16), located to the right of the port and labeled TERM, to either of the following positions:

• The ON position ( ) to internally terminate the thin-net segment

at the port.

• The OFF position ( ) if you do not want the thin-net segment to

internally terminate at the port.

2. If the Internal Termination switch is in the ON position, connect the thin-net segment directly to the BNC port.

3. If the Internal Termination switch is in the OFF position, perform the following steps:

Attach a BNC tee-connector to the BNC port on the module.

Page 3-22 NBR-SERIES Installation Guide

Page 40

Connecting the NBR to the Network

b. Attach the thin-net segment to one (1) of the female connectors on

the tee-connector.

Failure to terminate each tee-connector segment may result in improper segment operation.

CAUTION

c. Attach another thin-coax segment or a terminator to the other

female connector on the tee-connector.

When internal termination switch is set to off ( ):

Connect BNC tee-connector to port. Attach a terminator or terminated

thin-net segment to one female connector of tee-connector.

Connect a terminated thin-net segment to other female connector of tee-connector.

Attach thin-net segment directly to BNC connector when internal termination switch is set to on ( ).

1092_18

Figure 3-16 The EPIM-C

3.5.5 Connecting an AUI Cable to an EPIM-A

Ensure that the external transceiver to which you connect the EPIM-A does not have the signal quality error (SQE or

CAUTION

NBR-SERIES Installation Guide Page 3-23

“heartbeat”) test function enabled. The EPIM does not operate if the transceiver has the SQE test function enabled. Refer to the applicable transceiver manual for additional information.

Page 41

Chapter 3: Installation

Connect an EPIM-A to an external network segment as follows:

1. Check that the PWR LED on the EPIM-A is on. If the PWR LED is off, contact Cabletron Systems Technical Support.

2. Attach an external transceiver to the network segment intended for AUI port connection. For additional information, refer to the applicable transceiver manual.

3. Attach an AUI cable, no longer than 50 meters in length, to the transceiver you connected to the network in Step 2.

4. Connect the AUI cable to the AUI port located on the EPIM-A. See Figure 3-17.

1092_19

Figure 3-17 The EPIM-A

5. Lock the AUI connector into place using the connector slide latch.

6. If the transceiver PWR LED is off with the AUI cable connected, perform the following steps:

a. Check the AUI connections for proper pinouts. Appendix B lists

the pinouts for the transceiver connection. b. Check the cable for continuity. c. Reconnect the AUI cable to the NBR and the device.

If the transceiver PWR LED remains off, contact Cabletron Systems Technical Support.

Page 3-24 NBR-SERIES Installation Guide

Page 42

CHAPTER 4

TROUBLESHOOTING

This chapter provides information for troubleshooting network and NBR operational problems. The following sections describe the LANVIEW LEDs, provide a troubleshooting checklist, and explain how to use the LCD and the RESET button.

4.1 USING LANVIEW

The NBR uses the Cabletron Systems built-in visual diagnostic and status monitoring system called LANVIEW. With LANVIEW, you can quickly scan the LEDs to observe network status or diagnose network problems.

NBR-620 MULTI PORT BRIDGE ROUTER WITH LANVIEW

PWR

DISPLAY RESET

COM 2 COM 1

Figure 4-1 LANVIEW LEDs

CPU

RECEIVE TRANSMIT COLLISION STAND BY PORTD C B A

LANVIEW LEDs

1092_03

NBR-SERIES Installation Guide Page 4-1

Page 43

Chapter 4: Troubleshooting

Table 4-1 LANVIEW LEDs

LED Color Description

PWR Green Indicates that the

NBR is receiving power.

CPU Multi-

Color Green Yellow Red

RECEIVE A, B, C, D

TRANSMIT A, B, C, D

Yellow Light ﬂashes to

Green Light ﬂashes to

Flashing Green, indicates that the NBR is operating properly.

indicate that a segment is receiving a frame.

indicate that a segment is transmitting a frame.

Error Condition/ Recommended Action

If OFF, check the input power source (circuit breaker, fuse, etc.).

If OFF, Red, or Yellow the board has a problem.

Press the RESET button on the NBR front panel to re-initialize the board. If the board does not re-initialize, it has probably failed. Call Cabletron Systems Technical Support.

If none of the receive LEDs are ﬂashing, the NBR is not receiving frames on any of the segments.

Ensure that all connected ports are enabled.

If none of the transmit LEDs are ﬂashing, the NBR is not transmitting frames on any of the segments.

If not connected to the LAN, the LED ﬂashes every two seconds to indicate it is transmitting BPDU frames.

Contact Cabletron Systems Technical Support for assistance.

Page 4-2 NBR-SERIES Installation Guide

Page 44

Table 4-1 LANVIEW LEDs (Continued)

Using LANVIEW

LED Color Description

COLLISION A, B, C, D

STAND BY A, B, C, D

Red Collision detected

on a segment. When the LAN is operating properly, occasional ﬂashing is normal.

Yellow Indicates packets

cannot be forwarded as the Spanning T ree Algorithm has put the corresponding Bridge Port into a standby mode.

Error Condition/ Recommended Action

Excessive ﬂashing, or a solid light, indicates an inordinate number of collisions. This may be normal if there is a high amount of trafﬁc.

Ensure that the SQE test is disabled for any transceiver connected to the external channels (A, B, C, or D) of the NBR. Check cabling for data loops or defective cables.

Network Management has placed the NBR in a Standby mode; a data loop condition exists.

Check with your Network Administrator to ﬁnd out if the NBR was placed in Standby intentionally.

NBR-SERIES Installation Guide Page 4-3

Page 45

Chapter 4: Troubleshooting

4.2 TROUBLESHOOTING CHECKLIST

If your NBR is not operating properly, the following checklist describes some of the problems that may occur, possible causes for the problem, and suggestions for resolving the problem.

Table 4-2 Troubleshooting Checklist

Problem Possible Causes

No LEDs on. Loss of Power.

NBR not properly installed.

No Local Management Password screen.

Cannot contact the NBR from in-band management.

Terminal setup is not correct.

Improper console cable/ UPS cable pinouts.

Improper Community Names T ab le.

NBR does not have an IP address.

Recommended Action

Check that the NBR has adequate power.

Verify proper installation, and check to see that the PWR LED is green.

Refer to your NBR Local Management Guide for proper setup procedures.

Refer to your NBR Local Management Guide for proper console/ UPS port pinouts.

Refer to your NBR Local Management Guide for Community Names Table setup and IP address assignment procedures.

No link to device.

Check link to device.

Page 4-4 NBR-SERIES Installation Guide

Page 46

Troubleshooting Checklist

Table 4-2 Troubleshooting Checklist (Continued)

Problem Possible Causes

User parameters (IP address, Device and Module name, etc.) are lost when device is powered down.

No power to an external transceiver connected to an EPIM-A.

High number of collisions on EPIM port.

Port(s) go into standby for no apparent reason.

NVRAM reset switch has been toggled and user-entered parameters have been reset to factory default.

NVRAM may be defective.

AUI cable may be defective.

Transceiver may be defective.

EPIM is defective.

External transceiver has SQE enabled.

Conﬁgurations where devices connect across NBR channels can cause the NBR to detect a looped condition.

Recommended Action

See Chapter 3 for proper use of the NVRAM switch.

If NVRAM is defective, call Cabletron Systems Technical Support.

Replace AUI cable.

Replace transceiver.

Replace EPIM.

Disable SQE.

Discuss these conﬁgurations with Cabletron Systems Technical Support before implementing them into your network.

NBR-SERIES Installation Guide Page 4-5

Page 47

Chapter 4: Troubleshooting

4.3 USING THE LCD

The NBR-420 and NBR-620 are equipped with a front panel LCD as shown in Figure 4-2. The LCD provides network statistics and diagnostic information such as Power up diagnostics, Revision levels, MAC and IP Addresses, and Error Alerts.

RESET Button

LCD

NBR-620 MULTI PORT BRIDGE ROUTER WITH LANVIEW

PWR

DISPLAY RESET

COM 2 COM 1

DISPLAY Button

CPU

RECEIVE TRANSMIT COLLISION STAND BY PORTD C B A

1092_04

Figure 4-2 The LCD

Five types of messages appear on the LCD:

• Unsaved Initialization messages

• Static System messages

• Alarm messages

• Saved System messages

• Failure or Error messages Sections 4.3.1 through 4.3.5 describe each type of LCD message and

provide instructions for displaying them.

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Page 48

Using the LCD

4.3.1 Unsaved Initialization Messages

Unsaved Initialization messages are generated during power-up and appear as the event occurs. These messages track the boot up sequence. They are not saved and cannot be recalled.

Cabletron Hardware Init

Cabletron BOOTP Discovery

Cabletron TFTP Req. State

Cabletron TFTP Complete

Cabletron Programming Flash

Cabletron Boot Complete

Cabletron Boot From Flash

Cabletron RARP Req. State

Cabletron TFTP in Progress

Cabletron Erasing Flash

Cabletron Flash Programmed

Cabletron Test in Progress

4.3.2 Static System Messages

Static System messages provide NBR conﬁguration information. The product name must be displayed on the LCD before you can start stepping through the messages in the sequence shown in this section.

NOTE

Whether you are displaying Static System messages, Alarm messages, or Saved System messages, the display returns to the product name display 20 seconds after the last operation of the DISPLAY button.

To Display the Messages

With the product name displayed, momentarily press the DISPLAY button to step to the ﬁrst message. Each time you press the DISPLAY button, the next message is displayed until the last message. Then the display automatically exits to the product name.

NBR-SERIES Installation Guide Page 4-7

Page 49

Chapter 4: Troubleshooting

To Exit

There are three ways to exit the Static System messages:

• From the last Static System message

Momentarily press the DISPLAY button while the last message “COM 2 Port Function xxxxx” is displayed. The display automatically returns to the product name.

• Automatic 20-second exit

Allow 20 seconds to elapse after the last DISPLAY button operation. The display returns to the product name.

• Jump to Alarm messages

Press and hold the DISPLAY button for 3 seconds. When released, the display steps to the Alarm message described in Section 4.3.3.

Displayed Messages Comments

Host IP Address xxx.xxx.xxx.xxx

MAC Address 00001dxxxxx

RAM Image Rev. xx.xx.xx

Boot PROM Rev. xx.xx.xx

Flash Programmed xx Times

COM 1 Port Baud Rate xxxxx

COM 1 Port Function xxxxx

COM 2 Port Baud Rate xxxxx

COM 2 Port Function xxxxx

Displays the IP address of the NBR. Can change IP address in Local Management.

Displays the MAC address of channels A, B , C , D, E, or F.

Displays the revision number of the FLASH EEPROM.

Displays the revision number of the internal Boot PROM.

Displays the number of times a new software load to FLASH occurs.

Displays the baud rate set in Local Management.

Displays the current function of the COM 1 Port (OFFLINE, UPS, CONSOLE).

Displays the baud rate for COM 2 port.

Displays the current function of the COM 2 Port (OFFLINE, UPS, CONSOLE).

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Page 50

Using the LCD

4.3.3 Alarm Messages

Alarm messages pertain to events that occur within the NBR. The messages that can be displayed are shown in this section.

NOTE

To Display the Messages

Whether you are displaying Static System messages, Alarm messages, or Saved System messages, the display returns to the product name display 20 seconds after the last operation of the DISPLAY button.

There are two ways to gain access and display the Alarm messages:

• From the product name display

Press and hold the DISPLAY button for 3 seconds while the product

name is displayed. When the button is released, the display steps to the

saved Alarm messages. Thereafter, each time you press the DISPLAY

button, the next message is displayed.

• From a Static System message display

Press and hold the DISPLAY button for 3 seconds while a Static

System message is displayed. When the button is released, the display

steps to the Alarm messages described. Thereafter, each time you

press the DISPLAY button, the next message is displayed.

To Exit

There are two ways to exit the Alarm messages:

• Automatic 20-second exit

Allow 20 seconds to elapse after the last DISPLAY button operation.

The display returns to the product name.

• Jump to Saved System messages

Press and hold the DISPLAY button for 3 seconds. When released, the

display steps to the Saved System message described in Section 4.3.4.

NBR-SERIES Installation Guide Page 4-9

Page 51

Chapter 4: Troubleshooting

Displayed Messages Comments

Port xxxxxx Link Established

Port xxxxxx Not Linked

Network/Port x EPIM Inserted

Network/Port x EPIM Removed

Bridge Port x Stand By

Bridge Port x On Line

No Messages in Queue x

Displays the link status of ports A, B, C, D, E, or F.

Displays installation status of ports A, B, C, or D.

Displays installation status of ports A, B, C, or D

Indicates Bridge port A, B, C, or D in Stand By mode.

Indicates Bridge port A, B, C, or D On Line.

No Alarm messages.

4.3.4 Saved System Messages

Saved System messages are device related startup or boot strap messages, BOOTP/TFTP host, or startup error messages. The following messages can be displayed:

TFTP Host xxx.xxx.xxx.xxx

Last Host Used xxx.xxx.xxx.xxx

TFTP File xxxxxxxxxxxxxxxx

Last File Used xxxxxxxxxxxxxxx

Whether you are displaying Static System messages, Alarm

NOTE

messages, or Saved System messages, the display returns to the product name display 20 seconds after the last operation of the DISPLAY button.

To Display Messages

There are two ways to access and display the Saved System messages:

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Page 52

Using the LCD

• From the product name display

Press and hold the DISPLAY button for 3 seconds while the product

name is displayed. When the button is released, the display steps to the

Alarm messages. Then press and hold the DISPLAY button for

another 3 seconds. When the button is released, the display steps to the

first Saved System message. Thereafter, each time you press the

DISPLAY button, the next Saved System message is displayed.

• From an Alarm message display

Press and hold the DISPLAY button for 3 seconds while an Alarm

message is displayed. When released, the display steps to one of the

Saved System messages. Thereafter, each time you press the

DISPLAY button, the next Saved System message is displayed.

To Exit

There are two ways to exit the Saved System messages:

• Automatic 20-second exit

Allow 20 seconds to elapse after the last DISPLAY button operation.

The display returns to the product name.

• From any displayed System message

Press and hold the DISPLAY button for 3 seconds. When released, the

display automatically returns to the product name.

NBR-SERIES Installation Guide Page 4-11

Page 53

Chapter 4: Troubleshooting

4.3.5 Failure or Error Messages

Failure or Error Messages appear when an unrecoverable condition occurs. These messages are not saved and cannot be recalled by using the DISLAY button. When one of these messages appear call Cabletron Systems T echnical Support.

The Failure or Error messages are as follows:

Cabletron Ctrl. Reg. Err.

Cabletron SDRAM Failure

Cabletron SONIC Failure

Cabletron Console SCC Error

Cabletron 82C54 Failure

Cabletron BBRAM Failure

Cabletron Modem SCC Error

Cabletron Bit Swap Failure

Cabletron LDRAM Failure

4.4 USING THE RESET BUTTON

The NBR incorporates a recessed RESET button. See Figure 4-2. This RESET button initializes the NBR processor. To use the RESET button, use a pen or pencil to press the button in. When this is done, the NBR initializes itself.

Page 4-12 NBR-SERIES Installation Guide

Page 54

APPENDIX A

NBR SPECIFICATIONS

This appendix provides the operating speciﬁcations for the Cabletron Systems NBR. Cabletron Systems reserves the right to change these speciﬁcations at any time without notice.

A.1 OPERATING SPECIFICATIONS

FLASH Memory: 2 MB Shared Memory: 4 MB (expandable to 12 MB) Internal Processor: Intel 80960 running at 24 MHz Read Only Memory: 128 K Non-Volatile RAM: 128 K Ethernet Controller: 4 DP83932 Controllers CPU Memory: 8 MB (expandable to 12 MB)

NBR-SERIES Installation Guide Page A-1

Page 55

Appendix A: NBR Speciﬁcations

A.2 COM PORT PINOUTS

COM 1 PORT PINOUTS

Type: Standard RJ45 port

Pin 1 Transmit Data (XMT) From COM 1 Port

2 Data Carrier Detect (DCD) From COM 1 Port 3 Data Set Ready (DSR) To COM 1 Port 4 Receive Data (RCV) To COM 1 Port 5 Signal Ground (GND) 6 Data Terminal Ready (DTR) From COM 1 Port 7 Request To Send (RTS) To COM 1 Port 8 Clear To Send (CTS)

COM 2 PORT PINOUTS

Type: Standard RJ45 port

Pin 1 Transmit Data (XMT) From COM 2 Port

2 Data Carrier Detect (DCD) From COM 2 Port 3 Data Set Ready (DSR) To COM 2 Port 4 Receive Data (RCV) To COM 2 Port 5 Signal Ground (GND) 6 Data Terminal Ready (DTR) From COM 2 Port 7 Request To Send (RTS) To COM 2 Port 8 Clear To Send (CTS)

COM PORT (NBR-220 Only) PINOUTS

Type: Standard RJ45 port

Pin 1 Transmit Data (XMT) From COM Port

2 Data Carrier Detect (DCD) From COM Port 3 Data Set Ready (DSR) To COM Port 4 Receive Data (RCV) To COM Port 5 Signal Ground (GND) 6 Data Terminal Ready (DTR) From COM Port 7 Request To Send (RTS) To COM Port 8 Clear To Send (CTS)

Page A-2 NBR-SERIES Installation Guide

Page 56

Physical Properties

A.3 PHYSICAL PROPERTIES

Dimensions: 7.2H x 43.6W x 34.6D (cm)

2.8H x 17W x 13.5D (in)

Weight (unit): 3.18 kg (7 lbs)

A.4 ENVIRONMENTAL REQUIREMENTS

Operating T emperature: 5° to 40°C (41° to 104°F) Non-operating T emperature: -30° to 90°C (-22° to 194°F) Operating Humidity: 5% to 95% (non-condensing)

A.5 CERTIFICATION

Safety: UL 1950, CSA C22.2 No. 950, EN 60950, and

IEC 950

Emission: FCC Part 15 Class A, VCCI Class 1, and

EN 55022 Class A

Immunity: EN 50082-1

A.6 POWER SUPPLY REQUIREMENTS

NOTE

The power supply has two outputs of 5 volts and 12 volts. The maximum output power is 125 watts and the minimum efﬁciency is 65% under all conditions of line at full load. The minimum and maximum load current from each output is shown below.

Output Min. Load Max. Load Max. Power

5 Volts 1.00 Amps 15 Amps 75 Watts 12 Volts 0.15 Amps 4 Amps 48 Watts

NBR-SERIES Installation Guide Page A-3

The NBR has a universal power supply. This unit allows you to use an input power from 100 to 125 Vac or 200 to 250 Vac, 50/60 Hz.

Page 57

APPENDIX B

EPIM SPECIFICATIONS

B.1 EPIM SPECIFICATIONS

EPIMs enable the connection of the NBR to different media types. Cabletron Systems offers a variety of EPIMs. The following sections explain speciﬁcations for each EPIM.

B.2 EPIM-T

The EPIM-T is an RJ45 connector supporting UTP cabling. It has an internal Cabletron Systems TPT-T 10BASE-T Twisted Pair Transceiver.

The slide switch on the EPIM-T determines the cross-over status of the cable pairs. If the switch is on the X side, the pairs are internally crossed over. If the switch is on the = side, the pairs are not internally crossed over. Figure B-1 shows the pinouts for the EPIM-T in both positions.

Position X (crossed over)

1. RX+

2. RX-

3. TX+

4. NC

5. NC

6. TX-

7. NC

8. NC

Position = (not crossed over)

1. TX+

2. TX-

3. RX+

4. NC

Figure B-1 Crossover Switch on the EPIM-T

5. NC

6. RX-

7. NC

8. NC

1092_20

NBR-SERIES Installation Guide Page B-1

Page 58

Appendix B: EPIM Speciﬁcations

B.3 EPIM-F1/F2

The EPIM-F1 and EPIM-F2 shown in Figure B-2 support Multimode Fiber Optic cabling. Each EPIM has an internal Cabletron Systems FOT-F Fiber Optic Transceiver. The EPIM-F1 is equipped with SMA Connectors and the EPIM-F2 is equipped with ST Connectors. Speciﬁcations for the EPIMs are listed below.

1092_22

Figure B-2 EPIM-F1 and EPIM-F2

Parameter

Receive Sensitivity -30.5 dBm -28.0 dBm

Peak Input Power -7.6 dBm -8.2 dBm — — Transmitter Power 50/125 µm ﬁber -13.0 dBm -15.0 dBm 13.0 dB 17.5 dB

62.5/125 µm ﬁber -10.0 dBm -12.0 dBm 16.0 dB 20.5 dB 100/140 µm ﬁber -7.0 dBm -9.0 dBm 19.0 dB 23.5 dB Error Rate Better than 10

Typical Value

Worst Case

-10

Worst Case Budget

——

Typical Budget

The transmitter power levels and receive sensitivity levels listed are Peak Power Lev els after optical overshoot. Use a Peak Po wer Meter to compare the values giv en above to those measured on any particular port. If Power Levels are being measured with an Average Power Meter, add 3 dBm to the measurement to compare the measured values to the values listed (i.e.,

-33.5 dBm average + 3 dBm =-30.5 dBm peak).

Page B-2 NBR-SERIES Installation Guide

Page 59

EPIM-F3

B.4 EPIM-F3

The EPIM-F3 shown in Figure B-3 supports Single Mode Fiber Optic cabling. It has an internal Cabletron Systems FOT-F Fiber Optic Transceiver and is equipped with ST Connectors. Specifications for the EPIM-F3 are listed below.

1092_23

Figure B-3 EPIM-F3

Transmitter Power decreases as temperatures rise and increases as temperatures fall. Use the Output Power Coefﬁcient to calculate increased or decreased power output for the operating environment. For example, the typical power output at 25°C is -16.4 dBm. For a 4°C temperature increase, multiply the typical coefﬁcient (-0.15 dBm) by four and add the result to typical output power (4 x -0.15 dBm + -16.4 = -17.0).

NBR-SERIES Installation Guide Page B-3

Page 60

Appendix B: EPIM Speciﬁcations

Parameter Typical Minimum Maximum

Transmitter Peak Wave Length

Spectral Width 60 nm - 100 nm Rise Time 3.0 ns 2.7 ns 5.0 ns Fall Time 2.5 ns 2.2 ns 5.0 ns Duty Cycle 50.1% 49.6% 50.7% Bit Error Rate Better than 10

1300 nm 1270 nm 1330 nm

-10

The transmitter power levels given above are Peak Power Levels after optical overshoot. Use a Peak Power Meter to compare the values given above to those measured on any particular port. To measure power levels with an Average Power Meter, add 3 dBm to the average power measurement to compare the average power values measured to the values listed above (i.e., -33.5 dBm average + 3 dBm = -30.5 dBm peak).

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Page 61

EPIM-C

B.5 EPIM-C

The EPIM-C supports thin coaxial cabling and is equipped with an internal Cabletron Systems TMS-3 Transceiver. Use the TERM switch on the front of the EPIM-C to set the internal 50 Ohm terminator. This eliminates the need to connect the port to a T-connector and terminator. Figure B-1 shows the setting for the terminator switch.

Internal Termination Switch = On (internally terminated) = Off (need external termination)

1092_24

Figure B-4 EPIM-C with BNC Port

Connector Type

BNC receptacle, with gold center contact, for use with BNC type T-connectors and RG58 thin coaxial cable.

Grounding

Connecting a thin-net segment to earth ground at more than one point could produce dangerous ground currents.

The BNC port of the Coaxial Interface Modules is not connected to earth ground.

NBR-SERIES Installation Guide Page B-5

Page 62

Appendix B: EPIM Speciﬁcations

B.6 EPIM-A AND EPIM-X

The EPIM-A is a DB15 female connector used to attach segments to an external transceiver. The EPIM-X is equipped with dual internal transceivers. It has a DB15 male connector used to attach segments to an AUI cable. Figure B-5 shows both modules.

1092_25

Figure B-5 EPIM-A and EPIM-X, AUI Port

Table B-1 DB15 Pinouts

Pin 1 Logic Ref. 9 Collision -

2 Collision + 10 Transmit 3 Transmit + 11 Logic Ref. 4 Logic Ref. 12 Receive 5 Receive + 13 Power (+12Vdc) 6 Power Return 14 Logic Ref. 7 No Connection 15 No Connection 8 Logic Ref.

Connector Shell: Protective Ground

Page B-6 NBR-SERIES Installation Guide

Page 63

APPENDIX C

NETWORK PLANNING AND CONFIGURATION

This appendix contains general networking guidelines. Before attempting to install the NBR or any additional EPIMs or BRIMs, review the requirements and speciﬁcations outlined in this appendix.

Your network installation must meet the conditions, guidelines, speciﬁcations, and requirements included in this appendix to

CAUTION

C.1 NETWORK CABLE REQUIREMENTS

Take care in planning and preparing the cabling and connections for your network. The quality of the connections, the length of cables, and other conditions of the installation play critical roles in determining the reliability of your network.

Refer to the sections below that apply to your speciﬁc network conﬁguration.

ensure satisfactory performance of this equipment. Failure to follow these guidelines may produce poor network performance.

C.1.1 10BASE-T Twisted Pair Network

When connecting a 10BASE-T Twisted Pair Segment to an EPIM-T, ensure the network meets the following requirements:

• Length - The IEEE 802.3 10BASE-T standard requires that

10BASE-T devices transmit over a 100 meter (328 foot) link using

22-24 AWG unshielded twisted pair wire. However, cable quality

largely determines maximum link length. If you use high quality, low

attenuation cable, you can achieve link lengths of up to 200 meters.

Cable delay limits maximum link length to 200 meters, regardless of

the cable type.

NBR-SERIES Installation Guide Page C-1

Page 64

Appendix C: Network Planning and Conﬁguration

NOTE

Losses introduced by connections at punch-down blocks and other equipment reduce total segment length. For each connector or patch panel in the link, subtract 12 meters from the total length of your cable.

• Insertion Loss - Between frequencies of 5.0 and 10.0 MHz, the

maximum insertion loss must not exceed 11.5 dB. This includes the attenuation of the cables, connectors, patch panels, and reﬂection losses due to impedance mismatches in the link segment.

• Impedance - Cabletron Systems 10BASE-T Twisted Pair products

work on twisted pair cable with 75 to 165 ohms impedance. Unshielded twisted pair cables typically have an impedance of between 85 to 110 ohms. You can also use shielded twisted pair cables, such as IBM Type 1 cable, but keep in mind that this cable has an impedance of 150 ohms. The high impedance of the IBM Type 1 cable increases signal reﬂection. However, due to cable shielding, and its subsequent lack of crosstalk between shielded pairs, this signal reﬂection has little effect on the quality of the received signal.

• Jitter - Intersymbol interference and reflections can cause jitter in the

bit cell timing, resulting in data errors. 10BASE-T links must not generate more than 5.0 ns of jitter. Make sure your cable meets 10BASE-T link impedance requirements to rule out jitter as a concern.

• Delay - The maximum propagation delay of a 10BASE-T link segment

must not exceed 1000 ns. This 1000 ns maximum delay limits the maximum link segment length to no greater than 200 meters.

• Crosstalk - Signal coupling between different cable pairs within a

multi-pair cable bundle causes crosstalk. 10BASE-T transceiver design alleviates concerns about crosstalk, providing the cable meets all other requirements.

• Noise - Crosstalk, or externally induced impulses, can cause noise.

Impulse noise may cause data errors if the impulses occur at very speciﬁc times during data transmission. Generally, noise is not a concern. If you suspect noise-related data errors, you may need to reroute the cable or eliminate the source of the impulse noise.

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Page 65

Network Cable Requirements

• Temperature - Multi-pair PVC 24 AWG telephone cables typically

have an attenuation of approximately 8-10 dB/100 m at 20°C (68°F).

The attenuation of PVC insulated cable varies signiﬁcantly with

temperature. At temperatures greater than 40°C (104°F), we strongly

recommend using plenum-rated cable to ensure attenuation remains

within speciﬁcation.

C.1.2 Multimode Fiber Optic Network

When connecting a multimode ﬁber optic link segment to an EPIM-F1 or EPIM-F2, ensure the network meets the following requirements:

• Cable Type - Use the EPIM-F1 and EPIM-F2 for the following

multimode ﬁber optic media:

- 50/125 µm ﬁber optic cabling

- 62.5/125 µm ﬁber optic cabling

- 100/140 µm ﬁber optic cabling

• Attenuation - You must test the fiber optic cable with a fiber optic

attenuation test set adjusted for an 850 nm wavelength. This test

veriﬁes the signal loss if a cable falls within the following acceptable

levels:

- 13.0 dB or less for a 50/125 µm ﬁber cable segment

- 16.0 dB or less for a 62.5/125 µm ﬁber cable segment

- 19.0 dB or less for a 100/140 µm ﬁber cable segment

• Budget and Propagation Delay - When you determine the maximum

ﬁber optic cable length to incorporate ﬁber runs into your network, you

must calculate and consider the ﬁber optic budget (a total loss of

10.0 dB or less is permissible between stations) and total network

propagation delay.

- To determine the ﬁber optic budget, combine the optical loss due to the ﬁber optic cable, in-line splices, and ﬁber optic connectors. Typical loss for a splice and connector (together) equals 1 dB or less.

NBR-SERIES Installation Guide Page C-3

Page 66

Appendix C: Network Planning and Conﬁguration

- Network propagation delay is the amount of time it takes a packet to travel from the sending device to the receiving device. Total propagation delay allowed for the entire network must not exceed

25.6 µs in one direction (51.2 µs round trip). If the total propagation delay between any two nodes on the network exceeds

25.6 µs, you must use bridges.

• Length - The maximum possible multimode f iber optic cable length is

km (2187.2 yards). However, IEEE 802.3 FOIRL speciﬁcations

2 specify a maximum of 1 km (1093.6 yards).

C.1.3 Single Mode Fiber Optic Network

When connecting a single mode ﬁber optic link segment to an EPIM-F3, ensure the network meets the following requirements:

• Cable Type - Fiber optic link segments should consist of

8/125 to 12/125 µm single mode ﬁber optic cabling. You can also use

62.5/125 µm multimode cable with the EPIM-F3; however , multimode

cable allows for greater optical loss, and limits the possible distance to 2 km.

• Attenuation - You must test the fiber optic cable with a fiber optic

attenuation test set adjusted for a 1300 nm wavelength. This test veriﬁes that the signal loss in a cable falls within the acceptable level of 10.0 dB or less for any given single mode ﬁber optic link.

• Budget and Propagation Delay - When you determine the maximum

ﬁber optic cable length to incorporate ﬁber runs into your network, you must calculate and consider the ﬁber optic budget (a total loss of

10.0 dB or less is permissible between stations) and total network

propagation delay.

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Page 67

Network Cable Requirements

- Network propagation delay is the amount of time it takes a packet

to travel from the sending device to the receiving device. Total propagation delay for the entire network must not exceed 25.6 µs in one direction (51.2 µs round trip). If the total propagation delay exceeds 25.6 µs, you must use bridges.

• Length - If you meet all system budgets, the maximum single mode ﬁber optic cable length can reach 5 km (3.1 miles) with bridges at each segment end. However, IEEE 802.3 FOIRL speciﬁcations specify a maximum of 1 km (1093.6 yards).

C.1.4 Thin-Net Network

When connecting a thin-net (coaxial) segment to an EPIM-C, ensure your network meets the following requirements:

• Cable Type - Use only 50 ohm RG58A/U type coaxial cable for thin-net cable segments.

• Length - The thin-net segment must not exceed 185 meters.

• Terminators - Terminate each end of a thin-net segment.

• Connectors - You can use up to 29 tee-connectors throughout the length of the cable segment for host connections.

- If you use an excessive number of barrel connectors within the

cable segment (e.g., ﬁnished wall plates with BNC feed-throughs), you may need to reduce the number of host connections. For special network design, contact Cabletron Systems Technical Support.

Connecting a thin-net segment to earth ground at more than one point could produce dangerous ground currents.

- Grounding - For safety, ground only one end of a thin-net

segment. Do NOT connect EPIM BNC ports to earth ground.

NBR-SERIES Installation Guide Page C-5

Page 68

Appendix C: Network Planning and Conﬁguration

C.2 TRANSCEIVER REQUIREMENTS

When you connect an external network segment to an EPIM-A in your hub through a transceiver, that transceiver must meet IEEE 802.3 standards or Ethernet version 1.0 or 2.0 requirements. The transceiver must also have SQE disabled.

C.3 THE NBR AS A MULTIPORT ROUTER

An NBR routing image allows you to set up the module as a multi-port router. For information on how to upgrade the NBR to perform routing functions, and how to conﬁgure the NBR as a multi-port router, refer to Cabletron Systems Routing Services Conﬁguration Guide.

C.4 THE NBR-420/NBR-620 AND BRIMS

The example in Figure C-1 illustrates just one possible NBR-620 BRIM conﬁguration. The NBR620/BRIM combination provides various connection possibilities, depending on the BRIM(s) you use. Refer to individual BRIM manuals and/or Cabletron Systems Routing Services Conﬁguration Guide to better understand the capabilities of each device.

NBR-620

Port D

T1 Connection

MULTI PORT BRIDGE ROUTER

DISPLAY RESET

COM 2 COM 1

T1/FT1

WITH

LANVIEW

RECEIVE TRANSMIT

PWR

COLLISION

CPU

STAND BY EPIMD C B A

SYNC

LNK YEL STB DSR LNK

TST RED SYN CTS TST

BRIM-WT1 BRIM-A100

PORT F PORT E

PWR

EPIM-A

PORT D PORT C PORT B PORT A

Port C

STY LNK

Port B

XMT RCV

PWR

EPIM-A

FDDI Backbone

PWR

EPIM-A

Port A

Ethernet Backbone

1092_05

Figure C-1 The NBR-620 and BRIMs

Page C-6 NBR-SERIES Installation Guide

Page 69

APPENDIX D

ADDITIONAL INFORMATION

D.1 NBR OVERVIEW

The NBR provides bridging and management for up to four separate Ethernet channels (A, B, C, and D). The following list contains the currently available EPIMs:

• EPIM-T – 10BASE-T Twisted Pair Segment Interface Module

• EPIM-F1/EPIM-F2 – Multimode Fiber Optic Segment Interface Modules

• EPIM-F3 – Single Mode Fiber Optic Segment Interface Module

• EPIM-C – Thin-net Coaxial Interface Module

• EPIM-A/EPIM-X – AUI Cable Segment Interface Modules

In addition to Ethernet channels A through D, the NBR provides management for two optional Bridge/Router Interface Modules (BRIMs). These modules allow for additional Ethernet connections, Wide Area (Full or Fractional T1; 56 k DDS) access, or links to existing high-speed Asynchronous Transfer Mode (ATM) or Fiber Distributed Data Interface (FDDI) network backbones.

NOTE

NBR-SERIES Installation Guide Page D-1

Refer to the Customer Release Notes to see which BRIMs are supported.

Page 70

Appendix D: Additional Information

Since the NBR is SNMP compliant, you can control and monitor the device remotely and locally using different SNMP Network Management packages. NBR ﬁrmware also supports DLM and all RMON groups, including:

• Alarms

• Hosts Top N

• Events

• Matrix

• History

• Statistics

• Hosts

• Filter

• Packet capture

D.2 ETHERNET CHANNELS A, B, C, AND D

The NBR manages all Ethernet bridging trafﬁc within its resident hub. This means that the NBR-620 controls up to four of the Ethernet bridging channels—A, B, C, and D and the NBR-220 and NBR-420 control up to two channels—A and B. These channels access the same NBR shared memory, so bridging between channels is concurrent.

D.3 CHANNELS E AND F

The NBR-420 and NBR-620 support two optional Bridge/Router Interface Modules (BRIMs). These modules provide additional connectivity and either bridging or routing functions for your NBR. At the same time, BRIMs provide access to various transmission methods (e.g., ATM, FDDI, Wide Area, etc.).

NOTE

Page D-2 NBR-SERIES Installation Guide

Refer to the Customer Release Notes to see which BRIMs are supported.

Page 71

Bridging Functionality

D.4 BRIDGING FUNCTIONALITY

The NBR automatically conﬁgures itself as a bridge between channels A, B, C, D, E, and F for a six port bridge maximum. The IEEE 802.1d compliant bridge function supports multi-port bridging, the IETF Bridge MIB, Special Filtering Database, and Spanning Tree protocol.

The NBR incorporates IEEE 802.1d or DEC Spanning Tree Algorithms (user selectable), allowing bridges in parallel between segments as backup paths for fault tolerance. These parallel bridges remain in a standby condition until the primary path fails.

When the NBR receives frames (trafﬁc) from any of the Ethernet channels, it places the frame in its buffer memory, and then goes through an information gathering/decision making process of what to do with those frames. The device determines the following:

• Where the frames came from (source address), and if it has seen frames from that address before (learning)

• Where the frames are going (destination address), and if it has receiv ed frames from that address before (ﬁltering database lookup)

• Whether to forward (send on) or ﬁlter (discard) any of these frames (database lookup result)

• What channel to use if it must forward the frames

When the NBR forwards a frame, it extracts the frame buffer data (including the source and destination address), then transmits the frame onto the appropriate channel.

NBR-SERIES Installation Guide Page D-3

Page 72

Certification A-3 COM port pinouts A-2

Environmental requirements A-3

Help 1-7

LANVIEW LEDs 1-3, 2-2 LCD 1-3, 2-2, 4-6

NBR

connecting to the network 3-17 features 1-3 installation 3-1 overview D-1

Network

cable requirements C-1 connection 3-17 operating specifications A-1 transceiver requirements C-6

NVRAM reset switch 3-6

INDEX

Power supply requirements A-3

Related material 1-6 RESET button 1-3, 2-2, 4-12

Technical Support 1-7

NBR-SERIES Installation Guide Index-1

Page 73

POWER SUPPLY CORD

The mains cord used with this equipment must be a 2 conductor plus ground type with minimum 0.75 mm square conductors and must incorporate a standard IEC appliance coupler on one end and a mains plug on the other end which is suitable for the use and application of the product and that is approved for use in the country of application.

GERMAN:

Die Netzleitung, die mit diesem Geraet benuetzt wird, soll einen zwei Leiter mit Erdleiter haben, wobei die Leiter mindestens 0.75 mm sind, mit einer normalen IEC Geraetesteckdose an einem Ende und einem Geraetestecker am anderen Ende versehen sind, der fuer den Gebrauch und die Anwendung des Geraetes geeignet und der zum Benuetzen im Lande der Anwendung anerkannt ist.

SPANISH:

El cable principal de la red eléctrica utilizado con este equipo debe tener 2 conductores y 1 toma de tierra con un mínimo de 0.75 mm2 cada uno y necesita tener un aparato de acoplamiento standard IEC en un extremo y un enchufe para el cable principal de la red eléctrica en el otro extremo, lo cual sea adecuado para el uso y applicación del producto y lo cual sea aprobado para uso en el pais de applicación.

FRENCH:

Le cordon d' alimentation reliant cet appareil au secteur doit obligatoirement avoir deux ﬁls conducteurs de 0.75 mm2 minimum et un ﬁl de terre. It doit également être équipé du côté appareil d'une ﬁche agrée IEC et du côte secteur, d'une prise adaptée à l'usage du produit et aux normes du pays où l'appareil est utilisé.

Cabletron Systems NBR-420, NBR-620, NBR-220 User Manual

Specifications and Main Features

Frequently Asked Questions

User Manual

NOTICE

CONTENTS

INTRODUCTION

1.1 USING THIS MANUAL

1.2 NBR FEATURES

1.3 CONVENTIONS USED IN THIS DOCUMENT

1.4 RELATED MANUALS

1.5 GETTING HELP

CONTROLS AND INDICATORS

2.1 LANVIEW LEDs

2.2 RESET BUTTON

2.3 LCD DISPLAY

INSTALLATION

3.1 UNPACKING THE NBR

3.2 PREPARING THE NBR FOR INSTALLATION

3.2.1 Removing Chassis Cover

3.2.2 Setting Mode Switches

3.2.3 Setting NVRAM Reset Switch

3.2.4 Installing SIMM Upgrades

3.2.4.1 Installing FLASH SIMMs

3.2.4.2 Installing LDRAM and SDRAM SIMMs

3.2.5 Adding/Replacing EPIMs

3.2.6 Adding/Replacing BRIMs

3.2.7 Testing the NBR

3.3 INSTALLING THE NBR

3.3.1 Attaching the Strain-Relief Bracket

3.3.2 Rack Mounting the NBR

3.3.3 Free-Standing Installation

3.4 CONNECTING THE NBR TO THE POWER SOURCE

3.5 CONNECTING THE NBR TO THE NETWORK

3.5.2 Connecting an AUI Cable to an EPIM-X

3.5.4 Connecting a Thin-Net Segment to an EPIM-C

3.5.5 Connecting an AUI Cable to an EPIM-A

TROUBLESHOOTING

4.1 USING LANVIEW

4.2 TROUBLESHOOTING CHECKLIST

4.3 USING THE LCD

4.3.1 Unsaved Initialization Messages

4.3.2 Static System Messages

4.3.3 Alarm Messages

4.3.4 Saved System Messages

4.3.5 Failure or Error Messages

4.4 USING THE RESET BUTTON

NBR SPECIFICATIONS

A.1 OPERATING SPECIFICATIONS

A.2 COM PORT PINOUTS

A.3 PHYSICAL PROPERTIES

A.4 ENVIRONMENTAL REQUIREMENTS

A.5 CERTIFICATION

A.6 POWER SUPPLY REQUIREMENTS

EPIM SPECIFICATIONS

B.1 EPIM SPECIFICATIONS

B.2 EPIM-T

B.3 EPIM-F1/F2

B.4 EPIM-F3

B.5 EPIM-C

B.6 EPIM-A AND EPIM-X

NETWORK PLANNING AND CONFIGURATION

C.1 NETWORK CABLE REQUIREMENTS

C.1.1 10BASE-T Twisted Pair Network

C.1.2 Multimode Fiber Optic Network

C.1.3 Single Mode Fiber Optic Network

C.1.4 Thin-Net Network

C.2 TRANSCEIVER REQUIREMENTS

C.3 THE NBR AS A MULTIPORT ROUTER

C.4 THE NBR-420/NBR-620 AND BRIMS

ADDITIONAL INFORMATION

D.1 NBR OVERVIEW

D.2 ETHERNET CHANNELS A, B, C, AND D

D.3 CHANNELS E AND F

D.4 BRIDGING FUNCTIONALITY

INDEX