Cabletron Systems MRX Manual de usuario

The Complete Networking Solution

MRX/MRX-2 AND

MRXI/MRXI-2

10BASE-T HUB

INSTALLATION GUIDE

CABLETRON SYSTEMS, P.O. Box 5005, Rochester, NH 03867-5005

INC.

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.

Cabletron Systems, Inc.

P.O. Box 5005, Rochester, NH 03867-5005

Printed in the United States of America

Order number: 9030313 March 91

MRX, MRX-2, MRXI, MRXI-2, LANVIEW, SPIM-T, SPIM-T1,

TMS-3, FOT-F, TPT-T, SPIM-F1, SPIM-F2, SPIM-C, SPIM-A,

Remote LANVIEW/Windows, SPECTRUM, and LAN-MD are

trademarks of Cabletron Systems, Inc.

FCC NOTICE

This device complies with Part 15 of 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 re-

ceived, including interference that may cause undesired operation.

WARNING: This equipment uses and generates and can radiate

radio frequency energy and if not installed properly and used in

accordance with the instruction manual, may cause interference to

radio communications. It has been tested and found to comply with

the limits for a Class A digital device pursuant to Part 15 of FCC

Rules, which are designed to provide reasonable protection against

such interference in a commercial environment. Operation of this

equipment in a residential area is likely to cause interference in

which case the user at his own expense will be required to take

whatever steps may be necessary to correct the interference.

If this equipment does cause interference to radio or television,

which can be determined by turning the equipment off and on, the

user is encouraged to try to correct the interference by one or more of

the following measures:

• Re-orient the receiving antenna.

• Relocate the antenna with respect to the MRX/MRXI.

• Move the MRX/MRXI away from the antenna.

• Plug the MRX/MRXI into a different outlet so that the

MRX/MRXI and the receiver are on different branch circuits.

If necessary, the user should consult the dealer or an experienced

radio/ television technician for additional suggestions. The user may

find the following booklet prepared by the Federal Communication

Commission helpful:

“How to Identify and Resolve Radio TV Interference Problems”

This booklet is available from the U.S. Government Printing Office,

Washington D.C. 20402 - Stock No. 004-000-00345-4.

CONTENTS

iii

CONTENTS

CHAPTER 1 INTRODUCTION

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

1.2 The 10BASE-T HUB................................................................... 1-2

1.3 Related Manuals ......................................................................... 1-4

1.4 Getting Help................................................................................ 1-4

CHAPTER 2 INSTALLATION REQUIREMENTS/

SPECIFICATIONS

2.1 Network Requirements............................................................... 2-1

2.2 Selecting A Location For The HUB............................................ 2-1

2.3 Network Guidelines .................................................................... 2-2

2.3.1 10BASE-T Twisted Pair Network Requirements ...........2-2

2.3.2 Fiber Optic Network Requirements ................................ 2-4

2.3.3 Thin-Net Network Requirements .................................... 2-4

2.3.4 Transceiver/AUI Requirements ....................................... 2-5

2.4 Operating Specifications............................................................. 2-6

CHAPTER 3 INSTALLATION

3.1 Unpacking The HUB .................................................................. 3-1

3.2 Attaching The Strain Relief Bracket ......................................... 3-2

3.3 Installing The HUB .................................................................... 3-2

3.3.1 Rack Mounting The HUB ................................................ 3-2

3.3.2 Wall Mounting The HUB ................................................. 3-4

3.3.3 Free-Standing Installation .............................................. 3-7

3.4 Connecting The HUB To The Power Source.............................. 3-7

3.5 Connecting The HUB To The Ethernet Network......................3-8

3.5.1 Connecting The Network Port Cabling (MRX/MRXI).....3-8

3.5.2 Connecting The Network Port Cabling

(MRX-2/MRXI-2)............................................................... 3-8

3.5.3 Connecting A Twisted Pair Segment To A SPIM-T ........3-9

3.5.4 Connecting A Shielded Twisted Pair Segment

To A SPIM-T1 ................................................................. 3-10

CONTENTS

CONTENTS (cont.)

CHAPTER 3 (cont.)

3.5.5 Connecting A Fiber Optic Link Segment To A

SPIM-F1Or SPIM-F2 ..................................................... 3-11

3.5.6 Connecting A Thin-Net Segment To A SPIM-C............3-14

3.5.7 Connecting An AUI Cable To A SPIM-A.......................3-15

3.6 Finishing The Installation........................................................ 3-16

CHAPTER 4 TESTING AND TROUBLESHOOTING

4.1 Installation Check-Out ............................................................... 4-1

4.2 Testing Segments Attached To The HUB.................................. 4-2

4.3 Using LANVIEW ........................................................................ 4-5

CHAPTER 5 ADDING/REPLACING SPIMs

5.1 Opening The HUB ...................................................................... 5-1

5.2 Removing A SPIM....................................................................... 5-2

5.3 Installing A SPIM ....................................................................... 5-2

APPENDIX TWISTED PAIR WIRING GUIDE

A.1 Attaching Twisted Pair Segments To The HUB ...................... A-1

INTRODUCTION

Page 1-1

CHAPTER 1

INTRODUCTION

Welcome to the Cabletron Systems MRX/MRX-2 and MRXI/MRXI-2

10BASE-T HUB Installation Guide. This manual covers

installation instructions and provides reference information for the

following Cabletron Systems 10BASE-T Hubs:

• MRX

- 12-10BASE-T (using 50-pin Champ connector)

- 2 Single Port Interface Module (SPIM) slots

- No Management

• MRX-2

- 12-10BASE-T (using RJ-45 connectors)

- 2 Single Port Interface Module (SPIM) slots

- No Management

• MRXI

- 12-10BASE-T (using 50-pin Champ connector)

- 2 Single Port Interface Module (SPIM) slots

- SNMP Compliant Management

• MRXI-2

- 12-10BASE-T (using RJ-45 connectors)

- 2 Single Port Interface Module (SPIM) slots

- SNMP Compliant Management

NOTE: The term HUB is used throughout this manual when

describing features and functions that are common to all of the devices

listed above. The terms MRX, MRX-2, MRXI and MRXI-2 are only

used when it is necessary to describe features that are unique to a

specific device.

All four HUBs can serve as a repeater to allow expansion of existing

802.3 networks using a variety of media. All four HUBs are

10BASE-T and 802.3 compliant.

INTRODUCTION

Page 1-2

The MRX is functionally identical to the MRX-2 and the MRXI is

functionally identical to the MRXI-2. The MRX and MRXI provide a

50-pin Champ connector for ports 1 through 12, and the MRX-2 and

MRXI-2 provide twelve RJ-45 connectors.

The MRX/MRX-2 and MRXI/MRXI-2 are functionally the same,

except that the MRXI/MRXI-2 provides the capability of in-band and

out-of-band network management. The MRX/MRX-2 is not

accessible, either in-band or out-of-band, by network management.

1.1 USING THIS MANUAL

Prior to installing and operating the HUB, read through this manual

completely to familiarize yourself with its content and to gain an

understanding of the features of the HUB. A general working

knowledge of Ethernet and IEEE 802.3 type data communications

networks and their physical layer components will be helpful when

installing the HUB.

Chapter 1, Introduction, covers using this document, briefly

describes features of the HUB and concludes with a list of related

manuals.

Chapter 2, Requirements/Specifications, contains requirements

for locating and installing the HUB and operating specifications for

the MRX and MRXI.

Chapter 3, Installation, contains step-by-step installation

instructions that include mounting and cabling for your HUB.

Chapter 4, Testing and Troubleshooting,contains procedures for

checking for the proper installation of the HUB and a description of

the LANVIEW ™ LEDs and their function.

Chapter 5, Adding/Replacing SPIMs, describes removing and

installing optional SPIM boards in the HUB.

Appendix, Twisted Pair Wiring Guide,serves as an aid to wiring

punch-down blocks and twisted pair segments between your HUB

and 10Base-T Ethernet devices.

INTRODUCTION

Page 1-3

1.2 THE 10BASE-T HUB

The Cabletron Systems HUB provides twelve 10BASE-T compliant

ports (via 50 pin Champ connector) and two slots that support

Cabletron Systems’ Single Port Interface Modules (SPIM). A variety

of SPIMs are available permitting the expansion of an Ethernet/802.3

network via:

• Unshielded Twisted Pair Cable from the 10BASE-T Twisted Pair

Interface Modules (SPIM-T).

• Shielded Twisted Pair Cable from the 10BASE-T Twisted Pair

Interface Modules (SPIM-T1).

• Fiber Optic Cable, with SMA or ST connectors, from the Fiber

Optic Interface Modules (SPIM-F1 or SPIM-F2).

• Thin-Net Cable from the Coaxial Interface Module (SPIM-C).

• AUI Cable, to an external transceiver, from the AUI Interface

Module (SPIM-A).

Figure 1-1. MRX, MRX-2, MRXI and MRXI-2 10BASE-T HUBs

INTRODUCTION

Page 1-4

The HUB fully conforms to the IEEE 802.3 Repeater, AUI and

10BASE-T specifications, and provides the flexibility to connect

networks using IEEE 802.3, Ethernet Version 1 or Version 2

equipment. As an IEEE 802.3 compliant repeater, the HUB

transmits re-timed data packets, regenerates the preamble, extends

fragments, arbitrates collisions and automatically partitions problem

segments, and reconnects non-problem segments. This feature

minimizes the impact on network operation resulting from a problem

on one segment by isolating the problem segment so that only the

devices on that segment are affected. When the problem is solved, the

problem segment is automatically reconnected to the network.

Since the HUB utilizes polarity detection and correction, the twisted

pair connections are not sensitive to signal polarity. The network will

still function properly with the (+) and (–) lines within a pair

reversed. The LINK LED for the port with reversed polarity will

flash to indicate this condition. Operating in this condition is not

recommended and if this condition is discovered, the segment should

be removed from the network and wired correctly by a technician.

This reduces the potential for problems in the future if equipment

changes are made. Connector pinouts are provided in Chapter 2,

Installation Requirements/Specifications.

All four HUBs incorporate Cabletron Systems’ LANVIEW™ status

monitoring and diagnostic system. LANVIEW is a convenient

troubleshooting tool that allows you to monitor power, and data

activity and help you diagnose power failures, collisions, cable faults,

and link problems.

The MRXI provides an RS-232 Console port (not available in the

MRX) that supports a Digital Equipment Corporation™, VT220™ or

PC emulation of the VT220™ terminal. The terminal serves as a

local management console, providing out-of-band access to MRXI/

LM™, Local Management for the Cabletron Systems MRXI/MRXI-2.

MRXI/LM is an effective menu driven tool that presents screens that

integrate network status and network control. Several menus permit

the network manager to manage and monitor the flow of traffic and

access a summary of errors to pinpoint potential problem areas in a

network. This capability gives the network manager the ability to

interpret status and establish parameters to obtain optimal

performance for the network and, if necessary, permit diagnosis of

network problems. For additional information, refer to the

MRXI/LM, Local Management for the Cabletron Systems

MRXI/MRXI-2,User’s Manual.

INTRODUCTION

Page 1-5

The MRXI/MRXI-2 can also be controlled and managed in-band using

Cabletron Systems’ LANVIEW/Windows, SPECTRUM, and SNMP

network control management software.

1.3 RELATED MANUALS

The manuals listed below should be used to supplement the

procedures and other technical data provided in this manual. The

procedures contained in these manuals will be referenced where

appropriate, rather than repeated.

MRXI/LM, Local Management for the Cabletron Systems

MRXI/MRXI-2,User’s Manual.

Cabletron Systems’ LAN-MD Portable Ethernet Tester User’s

Manual.

1.4 GETTING HELP

If additional support is needed related to the Cabletron Systems

HUB, or if you have any comments, suggestions, or questions relating

to this manual contact Cabletron Systems Technical Support at:

Cabletron Systems, Inc.

P.O. Box 5005

Rochester, NH 03867-5005

Phone: (603) 332-9400

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