Cabletron Systems EMM-E6 User Manual 2

EMM-E6

ETHERNET BRIDGE/

MANAGEMENT MODULE

INSTALLATION GUIDE

DCBA

E

F

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.



Copyright 1996 by Cabletron Systems, Inc., P.O. Box 5005, Rochester, NH 03866-5005
All Rights Reserved
Printed in the United States of America

Order Number: 9031926 August 1996

SPECTRUM, LANVIEW, MMAC
EMM-E6, APIM, CRBRIM, FPIM, EPIM, EPIM-A, EPIM-C, EPIM-F1, EPIM-F2, EPIM-F3
EPIM-T

, and

EPIM-X

are trademarks of Cabletron 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

Element Manager

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

,

,

EMM-E6 Installation Guide i

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 EMM-E6 Installation Guide

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

Copyright Act of the United States or as authorized in writing by Cabletron.

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.

EMM-E6 Installation Guide iii

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 EMM-E6 Installation Guide

CONTENTS

CHAPTER 1 INTRODUCTION

1.1 EMM-E6 Overview.......................................................................1-1

1.2 How to Use This Manual ............................................................. 1-1

1.3 Document Conventions...............................................................1-3

1.4 Related Documents..................................................................... 1-4

1.5 Getting Help.................................................................................1-4

CHAPTER 2 CONTROLS AND INDICATORS

2.1 The Faceplate..............................................................................2-1

2.2 Internal Components...................................................................2-2

S

2.3 LANVIEW LED

CHAPTER 3 INSTALLATION

3.1 Unpacking the EMM-E6...............................................................3-1

3.2 Setting Mode Switches................................................................ 3-3

3.3 Pre-Installation Test.....................................................................3-5

3.4 Installation ................................................................................... 3-7

3.5 Connecting to the Network........................................................3-10

3.5.1 Connecting a 10BASE-T Segment to an EPIM-T.........3-10

3.5.2 Connecting a 10BASE-F Segment to an EPIM-F2

or EPIM-F3 ...................................................................3-13

3.5.3 Connecting a 10BASE-F Segment to an EPIM-F1.......3-15

3.5.4 Connecting an AUI Segment to an EPIM-X

or EPIM-A .....................................................................3-17

3.5.5 Connecting a 10BASE2 Segment to an EPIM-C..........3-18

3.6 Backplane Test..........................................................................3-20

...................................................................2-6

CHAPTER 4 TROUBLESHOOTING

S

4.1 Using LANVIEW LED

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

4.3 Using the Reset Switch ............................................................... 4-7

APPENDIX A SPECIFICATIONS

A.1 Physical Specifications................................................................A-1

A.2 Operating Specifications..............................................................A-1

A.3 Environmental Requirements......................................................A-2

A.4 Certification..................................................................................A-2

A.5 COM Port Pinout .........................................................................A-2

..........................................................4-1

EMM-E6 Installation Guide v

Contents

APPENDIX B UPGRADING THE EMM-E6

B.1 Locating BRIM Connectors.........................................................B-1

S

B.2 Adding EPIM

B.3 SIMM Upgrades..........................................................................B-3

B.3.1 Locating SIMMs.............................................................. B-3

B.3.2 Installing SIMMs ............................................................. B-4

APPENDIX C ETHERNET CABLING REQUIREMENTS

C.1 Network 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 10BASE2 Coaxial Cable Network...................................C-5

C.1.5 Transceiver Requirements..............................................C-5

INDEX

......................................................................B-2

vi EMM-E6 Installation Guide

CHAPTER 1

INTRODUCTION

Welcome to the Cabletron Systems
manual provides installation instructions and reference information for
the EMM-E6 Ethernet Bridge/Management Module.

EMM-E6 Installation Guide

. This

1.1 EMM-E6 OVERVIEW

The EMM-E6 is a high-speed Ethernet bridge that also performs
comprehensive SNMP-based chassis and network management functions.
The EMM-E6 provides six bridge ports consisting of three chassis
interfaces, one external interface, and two Bridge/Router Interface
Module (BRIM) interfaces.

1.2 HOW TO USE THIS MANUAL

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 EMM-E6.

You should have a general working knowledge of Ethernet or IEEE 802.3
type data networks prior to installing the EMM-E6. The following
summarizes the organization of this manual.

Chapter 1,

EMM-E6 Installation Guide

obtaining assistance from Cabletron Systems, and provides a list of
related documentation.

Introduction

, discusses the use and conventions of the

, details the procedures to follow for

Chapter 2,
components and monitoring indicators that make up the EMM-E6. This
chapter contains information that is essential to the understanding of the
procedures in the rest of the manual.

EMM-E6 Installation Guide 1-1

Controls and Indicators

, identifies and describes the

Chapter 1:

Introduction

Chapter 3,

Installation

, details the procedures to follow when unpacking,
testing, and installing the EMM-E6. This chapter contains information
and step-by-step instructions for connecting network cabling to the
EMM-E6 and closes with a procedure which may be used to test the
operation of the EMM-E6 in the network.

Chapter 4,

Troubleshooting

, describes how to use LANVIEW LEDs on
the EMM-E6. The chapter defines the different LED conditions and
provides a table of simple troubleshooting instructions for module-related
difficulties.

Appendix A,

Specifications

, provides the physical specifications and
operating requirements of the EMM-E6. This appendix also contains
serial port pinout tables for constructing Local Management cables.

Appendix B,

Upgrading the EMM-E6

, details the procedures that must
be followed when expanding the capabilities of the EMM-E6. This
appendix contains information on memory upgrades and the addition of
EPIM modules to the EMM-E6.

Appendix C,

Ethernet Cabling Requirements

, describes the test
characteristics that Ethernet cables must adhere to in order to be
standards-compliant. An y Ethernet link or cable that is to be connected to
the EMM-E6 should be verified to be within the specifications and
limitations provided in this appendix.

1-2 EMM-E6 Installation Guide

Document Conventions

1.3 DOCUMENT CONVENTIONS

The following conventions are used throughout this document:

Note

NOTE

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

information that may be of special importance.

!

CAUTION

Caution

damage to the equipment.

Electrical Hazard Warning

that could result in personal injury or death due to an electrical
hazard.

symbol. Contains information essential to avoid

symbol. Warns against an action

Figures throughout the document are identified by chapter and illustration
number. Many figures contain small numbers at the lower right-hand
corner of the illustration. These are Cabletron Systems document control
numbers and are not essential to an understanding of the document.

References to chapters or sections within this document will be printed in

boldface

References to other publications or documents will be printed in

type.

italic

type.

EMM-E6 Installation Guide 1-3

Chapter 1:

Introduction

1.4 RELATED DOCUMENTS

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
Cabletron Systems
Cabletron Systems

MMAC Overview and Setup Guide

EMM-E6 Local Management Guide

SPECTRUM Element Manager User’s Guide

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 [phone]

A.M

Monday – Friday; 8
By CompuServe GO CTRON from any ! prompt
By Internet mail [e-mail]
By FTP ctron.com (134.141.197.25)

Login
Password

anonymous

your email address

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

• A description of the failure

• A description of any action(s) already taken to resolve the problem

(e.g., changing mode switches, rebooting the unit, etc.)

. – 8 P.M. Eastern Time

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

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

• The serial and revision numbers of all Cabletron Systems products in

the network

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

recurring problem, etc.)

• Any previous Return Material Authorization (RMA) numbers.

1-4 EMM-E6 Installation Guide

CHAPTER 2

CONTROLS AND INDICATORS

This chapter identifies and describes the components and operational
indicators of the EMM-E6.

2.1 THE FACEPLATE

Reset Switch

LANVIEW LEDs

Interface E BRIM Slot

E

Interface F BRIM Slot

F

Figure 2-1 The EMM-E6 Faceplate

EPIM Slots

Serial Ports

Knurled Knobs

1926n01

Knurled Knobs

The black plastic knurled knobs on the faceplate of the EMM-E6 are used
to turn the securing screws that hold the EMM-E6 module in place in the
MMAC chassis.

EMM-E6 Installation Guide 2-1

Chapter 2:

Reset Switch

Controls and Indicators

The recessed reset switch re-initializes the EMM-E6 processor. The
activation of this switch will not initialize Non-Volatile Random Access
Memory (NVRAM) where the EMM-E6 stores configuration and
management parameters. The reset switch may be pressed with the point
of a pencil or pen. Once pushed in, the EMM-E6 will re-initialize itself.

LANVIEW LEDs

The EMM-E6 incorporates the LANVIEW status monitoring and
diagnostic system. LANVIEW LEDs can help diagnose many problems,
such as a fault in network cabling. LANVIEW LEDs are identified in
Section 2.3,

EPIM (Ethernet Port Interface Module) Slot

LANVIEW LEDS.

The EPIM slot is a covered opening in the EMM-E6 faceplate that can be
configured with an optional EPIM module.

Serial Ports

The EMM-E6 faceplate provides two serial communications ports for the
connection of out-of-band management devices.

BRIM (Bridge/Router Interface Module) Slots

The BRIM slot is a covered opening in the faceplate that can be
configured with a BRIM module.

2.2 INTERNAL COMPONENTS

The components listed in the following entries are all hidden inside the
MMAC chassis when the EMM-E6 has been installed. These components
may be located by removing the EMM-E6 from the chassis and holding
the module in the orientation shown in Figure 2-2 and Figure 2-3.

2-2 EMM-E6 Installation Guide

Chassis Backplane Connections

Internal Components

Channel E BRIM Connector

Dip Switch Bank

LSI

Logic

Logic

LSI

Channel F BRIM Connector

EPIM Connector Pins

1926n02

Figure 2-2 EMM-E6 Internal Components

Chassis Backplane Connections

The EMM-E6 connects to the backplane buses of the MMAC chassis
through these multipin connectors.

Dip Switch Bank

The EMM-E6 provides a bank of eight dual-position, or “dip” switches.
Several of these switches are used for testing purposes during the
manufacturing process. The dip switches can also be used to clear the
NVRAM of the EMM-E6, which contains configuration and local
management settings, or to force the EMM-E6 to request a new firmware
image from a properly configured BootP server.

BRIM Connectors

The Channel E and Channel F BRIM connectors allow the EMM-E6 to
connect BRIM modules to Ethernet Channels E and F of the EMM-E6.

EMM-E6 Installation Guide 2-3

Chapter 2: Controls and Indicators

EPIM Connector Pins

The EPIM connector pins are two sets of built-in pins that connect the
EMM-E6 Ethernet Channel D to optional EPIM modules. The proper
insertion of the EPIM will automatically connect these pins to the
connector located on the EPIM.

FLASH Memory SIMM Slot (shown populated)
BRIM-F Ribbon Connector

LSI

Logic

Logic

LSI

SDRAM SIMM Slot

LDRAM SIMM Slot (shown populated)

Figure 2-3 EMM-E6 Internal Components

1926n03

SDRAM SIMM Slot

The EMM-E6 motherboard provides the option of upgrading memory
capacity by using Single In-line Memory Modules (SIMMs).

The EMM-E6 comes with 4 Megabytes (MB) of Shared Dynamic
Random Access Memory (SDRAM) built into the module. The SDRAM
temporarily stores the packets received be the module while forwarding,
filtering, and error checking operations are performed.

2-4 EMM-E6 Installation Guide

Internal Components

LDRAM SIMM Slot

The EMM-E6 comes with 4 MB of Local Dynamic Random Access
Memory (LDRAM) built into the module and one 4 MB SDRAM SIMM,
for a total of 8 MB of Shared Dynamic RAM. LDRAM is the “Main”
memory from which the switching functionality of the EMM-E6 operates.

NOTE

FLASH Memory SIMM Slot

Some advanced EMM-E6 operations, such as extended
RMON or Cabletron Systems Routing Services, require an
EMM-E6 with greater than 8 MB of LDRAM. In these cases, the
4 MB SIMM that is shipped in the LDRAM slot must be
upgraded to a higher-capacity SIMM. Contact your Cabletron
Systems Sales Representative for more information about
available memory upgrades for the EMM-E6.

The EMM-E6 incorporates 2 MB of FLASH Electrically Erasable
Programmable Read Only Memory (FLASH EEPROM). FLASH
memory holds the operating instruction code of the EMM-E6. When the
module is activated, the instruction code (firmware) held in FLASH
memory is forwarded to Main memory, decompressed, and used to start
up the EMM-E6.

The use of FLASH memory, in conjunction with the runtime download
capabilities of the EMM-E6, allows the downloading of firmware to the
module without requiring that the module be shut down. The firmware
download may be performed at any time during the operation of the
module, and the new firmware image will be used at the next reset of the
module.

BRIM-F Ribbon Connector

The BRIM-F ribbon connector provides a connection point for the special
ribbon cable used to connect FDDI BRIMs (the BRIM-F6 or BRIM-F0)
to Ethernet Channel E of the EMM-E6.

EMM-E6 Installation Guide 2-5

Chapter 2: Controls and Indicators

2.3 LANVIEW LEDS

The LANVIEW LEDs on the EMM-E6 faceplate provide diagnostic and
status monitoring information. The LEDs are identified by labels which
border the LED in question.

RESET

CPU

ABCD

STBY

RCV
XMT

CLN

Figure 2-4 EMM-E6 LANVIEW LEDs

The use of these LEDs for troubleshooting is covered in Chapter 4,
Troubleshooting. The following LEDs are on the faceplate of the
EMM-E6:

CPU

The CPU LED indicates the operating status of the EMM-E6, and is
primarily concerned with the operation of the onboard i960 RISC
processor.

NOTE

The STBY, RCV, XMT, and CLN LEDs are in a matrix, which
provides these indicators for four of the EMM-E6 Ethernet
channels. To read the LEDs, the vertical column indicates the
interface or channel the LED designates (D, C, B, or A), while
the horizontal row denotes the condition or statistic being
monitored.

1926n04

2-6 EMM-E6 Installation Guide

LANVIEW LED

STBY

The STBY LED lights to indicate the associated port has been placed in
standby mode, either through management operations or by the operation
of the Spanning Tree Algorithm.

RCV

The RCV LED indicates the reception of Ethernet frames by the
associated port or interface.

XMT

The XMT LED indicates the transmit status of the associated port or
interface.

CLN

The CLN LED flashes to indicate that a collision has been detected on the
associated segment.

S

EMM-E6 Installation Guide 2-7

Chapter 2: Controls and Indicators

2-8 EMM-E6 Installation Guide

CHAPTER 3

INSTALLATION

This chapter contains instructions for the following procedures:

• Preparing the EMM-E6 for installation

• Testing the EMM-E6 prior to network connection

• Installing the EMM-E6 into a Multi Media Access Center (MMAC)

• Connecting the EMM-E6 to a network

• Testing the installed EMM-E6

3.1 UNPACKING THE EMM-E6

Unpack the EMM-E6 as follows:

Observe all antistatic precautions when handling sensitive
electronic equipment.

!

CAUTION

1. Remove the shipping material covering the EMM-E6.

2. Verify the contents of the packing carton. The carton, as shipped,
should contain the following items:

Table 3-1 Contents of EMM-E6 Carton

Item Quantity

EMM-E6 1
Disks containing

firmware images
Grounding Strap 1
RJ45 Adapter Kit 1
Release Notes 1
Cabletron Systems

Hardware Manuals
CD-ROM

EMM-E6 Installation Guide 3-1

2

1

Chapter 3: Installation

3. Carefully remove the module from the shipping box. Leave the
module inside its non-conductive bag until you are ready to install it.

4. Visually inspect the non-conductive bag. If there are any signs of
damage, contact Cabletron Systems Technical Support immediately.

5. Place the static grounding strap properly upon your wrist before
opening the non-conductive bag.

6. Open the non-conductive bag by tearing the black and yellow tape
seal.

Do not cut the bag open, as damage to the EMM-E6 may
result.

!

CAUTION

7. Perform a second visual inspection of the module.

3-2 EMM-E6 Installation Guide

Setting Mode Switches

3.2 SETTING MODE SWITCHES

A bank of dip switches, located at the top of the EMM-E6 (Figure 3-1),
provides several configuration options. All switches ship in the OFF
position.

Never adjust switch settings while the EMM-E6 is on. Not only
is this dangerous, but the change in state (i.e., position) only
activates the switch function after restarting or cycling power to
the board.

ON

A L C O G D S O 8 S

12345678

LSI

Logic

Logic

LSI

Figure 3-1 EMM-E6 Dip Switches

On
Off

1926n05

EMM-E6 Installation Guide 3-3

Chapter 3: Installation

Switch definitions are as follows:

• Switch 1: Cabletron Systems use only.

• Switch 2: Cabletron Systems use only.

• Switch 3: Not Used.

• Switch 4: Not Used.

• Switch 5: Cabletron Systems use only.

• Switch 6: Forced Download. Changing the state of this switch
(i.e., moving the switch from one position to another) forces a BootP
download.

After changing the position of Switch 6 and restarting the EMM-E6,
the EMM-E6 requests a new image download until it either receives a
new image or the reset button on the front panel is pressed. When the
reset button is pressed, the EMM-E6 continues trying to contact a
BootP server, but will timeout in approximately one minute. If the
EMM-E6 times out, the image is loaded from its FLASH memory.

NOTE

Do NOT change the state of Switch 6 unless you ha v e a station
acting as a BootP server for the EMM-E6. This BootP station
must reference a station that is acting as a TFTP (Trivial File
Transfer Protocol) server and that contains the EMM-E6 image
file. The EMM-E6 will request the location of the image file from
the BootP server and use TFTP to download that file from the
TFTP server.

If one of these requirements is not met, the EMM-E6 Forced
Download operation will not be completed correctly.

• Switch 7: NVRAM Reset. The EMM-E6 uses NVRAM to store
user-entered parameters such as IP addresses, 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.

3-4 EMM-E6 Installation Guide

Pre-Installation Test

Once the EMM-E6 resets, you can either use the defaults or re-enter
your own parameters. The EMM-E6 stores these parameters in
NVRAM when the device powers down. These parameters remain in
NVRAM until the state of the switch changes again.

Do not

NOTE

change the state of Switch 7 unless you intend to reset

the EMM-E6 user parameters to the factory default settings.

• Switch 8: Password Defaults. Changing the state of this switch

(i.e., moving the switch from one position to another and leaving it
there) clears user-entered passwords stored in NVRAM, and restores
default passwords. Once reset you can use the defaults or re-enter your
passwords.

Do not

NOTE

change the state of Switch 8 unless you want to reset
the EMM-E6 user-configured passwords to their f actory default
settings.

3.3 PRE-INSTALLATION T EST

Before installing the EMM-E6 in a live network, you may want to test the
module in a controlled situation to ensure that it is bridging traffic. You
can perform this test with two workstations (see Figure 3-2), using an
MMAC with an EMM-E6 and Ethernet Media Interface Module (MIM,
RMIM, or XMIM) installed and set up as follows:

1. Install the EMM-E6 into an MMAC that is not attached to a network.

2. Install an Ethernet Media Interface Module (MIM), Repeating Media
Interface Module (RMIM), or Port Assignment Media Interface
Module (XMIM) in the MMAC. Follow the installation instructions
found in the Installation or User’s Guide shipped with that product.

EMM-E6 Installation Guide 3-5

Chapter 3: Installation

MMAC-M3FNB

M3FM

Figure 3-2 Pre-Installation Test Configuration

M3PSM

1926n06

3. Connect the first workstation to an EPIM that has been inserted in the
EMM-E6 EPIM slot 1.

4. Connect the second workstation to an active port on the Media
Interface Module that has been placed in the MMAC chassis.

5. Designate the first workstation as a file server and the second one as
the client (refer to individual workstation manuals for instructions on
assigning server/client relationships).

6. Send packets between the two workstations to verify the proper
operation of the EMM-E6.

If a failure occurs, contact Cabletron Systems Technical Support.

3-6 EMM-E6 Installation Guide

Installation

3.4 INSTALLATION

Installing the EMM-E6 into any MMAC hub is an easy operation and
requires no special tools. Howev er , when you install your device, k eep the
following in mind:

Any installation operations should be performed only by
qualified personnel.

You may only install the EMM-E6 in slots 1 and 2 (farthest slots
to the right) of the MMAC chassis. The EMM-E6 uses both

!

CAUTION

CAUTION

Install the EMM-E6 into the MMAC-FNB (backplane) as follows:

slots.

Observe all antistatic precautions when handling sensitive
electronic equipment.

!

NOTE

We recommend powering down your MMAC when inserting or
removing modules, even though Cabletron Systems modules
have “hot swap” capabilities.

1. Remove the safety bars that protect the chassis and remove any

module to be replaced or blank MMAC slot covers, in accordance with
the installation and removal procedures for these items.

2. Holding the EMM-E6 by the front panel, or by the edges of the board,

align the bottom and top edges of the printed circuit board with the
guides. Make sure that both the bottom and top edges of the printer
circuit board rest in these guides.

3. Slide the EMM-E6 (Figure 3-3) into slots 1 and 2 of the MMAC

chassis.

Forcing a misaligned module into place can damage the
EMM-E6 or the MMAC backplane.

!

CAUTION

EMM-E6 Installation Guide 3-7

Chapter 3: Installation

4. Firmly press the module connections into the backplane. Do not try to
force the module into place or use the knurled knobs to draw the
module into the backplane.

1926n07

Module Guide Channels

Figure 3-3 Installing the EMM-E6

5. Secure the module to the MMAC chassis by tightening the knurled
knobs. If you do not tighten the knurled knobs, vibration can cause the
module to lose contact with the backplane and disrupt your network.

6. Reinstall the MMAC chassis safety bars.

7. Power-up the MMAC (if it is not already ON).

8. Observe the status of the LANVIEW LEDs (Figure 3-4) on the
EMM-E6. When the CPU LED is amber, the module is in boot state.
During this approximately one minute period the EMM-E6 cycles
through a series of internal diagnostics.

3-8 EMM-E6 Installation Guide

RESET

STBY

RCV
XMT

Installation

CPU

ABCD

CLN

Figure 3-4 EMM-E6 LANVIEW LEDs

9. After the system boot procedure, the CPU LED should be flashing

green, indicating proper EMM-E6 operation.

Proceed to Section 3.5, Connecting to the Network, to connect the
appropriate network segments to the EMM-E6 and individual EPIMs (for
connections to individual BRIMs, refer to the appropriate BRIM Guides).

1926n04

EMM-E6 Installation Guide 3-9

Chapter 3: Installation

3.5 CONNECTING TO THE NETWORK

This section gives procedures for connecting the EMM-E6 and various
EPIMs to the network. Refer to the list below and follow the procedures
in the subsection for appropriate module type:

• Connecting a 10BASE-T Segment to an EPIM-T: Section 3.5.1

• Connecting a 10BASE-F Segment to an EPIM-F2 or EPIM-F3:
Section 3.5.2

• Connecting a 10BASE-F Segment to an EPIM-F1: Section 3.5.3

• Connecting an AUI Segment to an EPIM-X or EPIM-A:
Section 3.5.4

• Connecting a 10BASE2 Segment to an EPIM-C: Section 3.5.5

3.5.1 Connecting a 10BASE-T Segment to an EPIM-T

NOTE

For proper operation, the EPIM-T module to be configured for
use in the EMM-E6 module must be of EPIM board revision 04
or greater. Board revision numbers are found f ollowing the part
number printed on the Printed Circuit Board of the EPIM.

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 3-5 to properly set the EPIM-T crossover switch.

NOTE

3-10 EMM-E6 Installation Guide

To establish a link, you must have an odd number of
crossovers (preferably one) between 10BASE-T devices of the
same type (i.e., from repeater to repeater or transceiver to
transceiver).

Position X
(crossed over)

Connecting to the Network

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 3-5 EPIM-T Crossover Switch

5. NC

6. RX-

7. NC

8. NC

1926n08

1. Align the RJ45 connector with the socket of the RJ45 port. The
connector will only insert and lock if the raised locking clip of the
RJ45 connector is inserted into the correct location.

2. Press the RJ45 connector into the port until the click of the locking clip
is felt. The pressure required to perform this should be minimal. If you
encounter resistance or excessive friction, remove the connector and
check the port for obstruction. Also, verify that the connector and the
port are of the same type.

Once the locking clip snaps into place, the RJ45 connector will remain
in the port.

3. Check that the LNK indicator LED is ON. If the indicator is not ON,
the port does not have a valid link. Perform each of the following steps
until you reach a resolution of the problem and achieve a link.

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

pair segment is ON.

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

the proper pinouts.

EMM-E6 Installation Guide 3-11

Chapter 3: Installation

Tx+

1

Tx-

2

Rx-

3

Rx+

6

RX+/RX- and TX+/TX- must share a common

Figure 3-6 Cable Pinouts - RJ45 Port

Straight-Through

color pair

10BASE-T Device PortEPIM-T RJ45 Port

1

Rx+
Rx-

2

Tx-

3
6

Tx+

1926n09

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

specifications outlined in Appendix C, Ethernet Cabling
Requirements.

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

T o remo ve the RJ45 connector from the port once it is locked in, grasp the
cable where it enters the network device. Using your finger or a
non-conductive probe (the cap of a ballpoint pen is a useful tool for
recessed ports) pinch the exposed arm of the locking clip towards the
main body of the housing. When the arm contacts the housing, the locking
clip has been disengaged. W ithout releasing the arm, gently pull the RJ45
connector directly out of the port.

If the connector will not come out, there may be damage to the locking
clip. Examine the arm of the locking clip. While pressing the arm back
toward the shell of the connector, verify that the clip, located within the
port, is being moved. If the clip is broken, you may need to use a
non-conductive probe to disengage the locking clip.

Do not place foreign objects into device ports while they are
connected to a power source.

3-12 EMM-E6 Installation Guide

Connecting to the Network

3.5.2 Connecting a 10BASE-F Segment to an EPIM-F2

or EPIM-F3

NOTE

For proper operation, the EPIM-F2 module to be configured f or
use in the EMM-E6 module must be of EPIM board revision 05
or greater. EPIM-F3 modules used in the EMM-E6 must be of
EPIM board revision 02 or greater. Board revision numbers are
found following the part number printed on the Printed Circuit
Board of the EPIM.

Each fiber optic link consists of two strands of fiber optic cabling: the
transmit (TX) and the receive (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. The receive strand of the applicable port on the
module connects to the transmit port of the fiber optic Ethernet device.

Cabletron Systems recommends labeling fiber optic cables to indicate
receive and transmit ends. Many cables are prelabeled, providing
matching labels or tapes at both ends of each strand of cable.

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.

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 one fiber to the applicable receive port on the module. Insert

the ST connector into the port with the alignment slot on the connector
inserted over the locking key on the port. Turn the connector
clockwise to lock it down.

EMM-E6 Installation Guide 3-13

Chapter 3: Installation

1926n10

Figure 3-7 ST Connector Insertion

3. Attach the other fiber of the pair to the applicable transmit port on the
module. Use the same procedure for insertion of the ST connector.

4. At the other end of the fiber optic cable, attach the fiber pair to the
transmit and receive ports of the device.

If link indicators are present for the fiber optic connection, check that they
are ON. If an indicator is present but not ON, that port does not have a
valid link. Perform each of the following steps until you reach a resolution
of the problem and achieve a link.

• Check that the device at the other end of the link is ON.

• Verify proper crossover of the fiber strands. Try sw apping the transmit
and receive connections at only one end of the link.

• Verify that the fiber connection meets the dB loss specifications
outlined in Appendix C, Ethernet Cabling Requirements.

If you are still unable to establish a link, attempt to make the connection
between the devices with another fiber optic cable. If this is unsuccessful,
contact Cabletron Systems Technical Support.

3-14 EMM-E6 Installation Guide

Connecting to the Network

3.5.3 Connecting a 10BASE-F Segment to an EPIM-F1

NOTE

CAUTION

For proper operation, the EPIM-F1 module to be configured f or
use in the EMM-E6 module must be of EPIM board revision 05
or greater. Board revision numbers are found f ollowing the part
number printed on the Printed Circuit Board of the EPIM.

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

Each fiber optic link consists of two strands of fiber optic cabling: the
transmit (TX) and the receive (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. The receive strand of the applicable port on the
module connects to the transmit port of the fiber optic Ethernet device.

Cabletron Systems recommends labeling fiber optic cables to indicate
receive and transmit ends. Many cables are prelabeled, providing
matching labels or tapes at both ends of each strand of cable.

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.

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 one fiber to the receive port (RX) on the EPIM-F1. Insert the

SMA connector into the port. Turn the connector clockwise until the
connector will no longer turn easily. Do not overtighten the connector.

EMM-E6 Installation Guide 3-15

Chapter 3: Installation

1926n11

Figure 3-8 SMA Connector Insertion

3. Attach the other fiber of the pair to the applicable transmit port on the
module.

4. At the other end of the fiber optic cable, attach the fiber pair to the
transmit and receive ports of the device.

If link indicators are present for the fiber optic connection, check that they
are ON. If an indicator is present but not ON, that port does not have a
valid link. Perform each of the following steps until you reach a resolution
of the problem and achieve a link.

• Check that the device at the other end of the link is ON.

• Verify proper crossover of the fiber strands. Try sw apping the transmit
and receive connections at only one end of the link.

• Verify that the fiber connection meets the dB loss specifications
outlined in Appendix C, Ethernet Cabling Requirements.

If you are still unable to establish a link, attempt to make the connection
between the devices with another fiber optic cable. If this is unsuccessful,
contact Cabletron Systems Technical Support.

3-16 EMM-E6 Installation Guide

Connecting to the Network

3.5.4 Connecting an AUI Segment to an EPIM-X or

EPIM-A

NOTE

Ensure that the external transceiver to which the EPIM-A
connects does not have the signal quality error (SQE or
“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.

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

Attach an AUI cable, no longer than 50 meters in length, to the external
transceiver.

1. Align the DB15 connector of the AUI cable with the AUI port of the

EPIM as shown in Figure 3-9. The port will only connect if it is
properly aligned.

2. Firmly press the AUI connector over the AUI port. If there is a slide

latch present for the AUI connector, slide it over the locking posts on
the DB15 port.

1926n12

Figure 3-9 AUI Connector Insertion

EMM-E6 Installation Guide 3-17

Chapter 3: Installation

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

a. Check the AUI connections for proper pinouts.
b. Check the cable for continuity.
c. Reconnect the AUI cable to the EMM-E6 and the device.

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

3.5.5 Connecting a 10BASE2 Segment to an EPIM-C

NOTE

For proper operation, the EPIM-C module to be configured for
use in the EMM-E6 module must be of EPIM board revision 05
or greater. Board revision numbers are found f ollowing the part
number printed on the Printed Circuit Board of the EPIM.

To connect a thin coaxial cable segment to an EPIM-C perform the
following steps:

Before attaching a male BNC connector to a female BNC barrel
connector or terminator, look into the end of the connector to verify that
the gold contact pin is present and centered. An y bent or brok en pins may
not connect properly and should be replaced.

1. Set the Internal Termination (TERM) switch, located to the right of the
port and labeled TERM, to one of the following positions:

a. The ON position ( ) to internally terminate the thin coaxial cable

segment at the port. Thin coaxial cable segments may be directly
connected to the port.

b. The OFF position ( ) to not internally terminate the thin coaxial

cable segment at the port. Segments may only be connected
through T-connectors which are connected to properly terminated
segments on both ends.

3-18 EMM-E6 Installation Guide

Connecting to the Network

NOTE

Failure to terminate each T-connector segment may result in
improper segment operation. Place a terminator on any open
female connection on the T-connector.

2. Align the guide channels of the BNC (male) metal housing with the

locking keys of the BNC barrel (female) connector on the EPIM. Slide
the metal housing of the male connector straight over the metal
housing of the female connector.

3. Once the housing stops moving in, turn the metal housing clockwise

while continuing to apply light forward pressure.

1926n13

Figure 3-10 BNC Connector Insertion

4. The locking keys of the female connector will pull the connector in

until they reach the circular locking holes at the end of the guide
channels. The keys will click the connector into place and hold it there.

To remove the BNC connector, perform the steps above in reverse order,
turning the metal housing counter-clockwise and pulling the connector
straight off of the female BNC connector.

EMM-E6 Installation Guide 3-19

Chapter 3: Installation

3.6 BACKPLANE T EST

Once the EMM-E6 has been installed in the network environment, you
may wish to test the operation of the Ethernet bridging functionality and
the EMM-E6’s connection to the chassis backplane. Again, you can use
two workstations set up as file server and client. See Figure 3-11.

1. After the EMM-E6 is installed in the MMAC, connect the client
workstation to the EMM-E6 EPIM 1 port.

2. Connect the server workstation to another Ethernet MIM that is
accessible from an Ethernet channel in the MMAC-FNB hub.

3. Send packets between the two workstations to verify the proper
operation of the EMM-E6. A “ping” test will send packets from one
station to another.

If a failure occurs, contact Cabletron Systems Technical Support.

M5PSM M5PSM

1926n14

Figure 3-11 Backplane Test Configuration

3-20 EMM-E6 Installation Guide

CHAPTER 4

TROUBLESHOOTING

This chapter provides diagnostic and troubleshooting information.

4.1 USING LANVIEW LEDS

The EMM-E6 uses the Cabletron Systems built-in visual diagnostic and
status monitoring system called LANVIEW. With LANVIEW, you can
quickly scan the EMM-E6 LEDs to observe network status or diagnose
network problems.

NOTE

provides these indicators for four of the EMM-E6 Ethernet
channels. To read the LEDs, the vertical column indicates the
interface or channel the LED designates, while the horizontal
row denotes the condition or statistic being monitored.

Table 4-1 LANVIEW LED Messages

LED Color Description

The STBY, RCV, XMT, and CLN LEDs are in a matrix, which

Green
(Flashing)

CPU

Red CPU error condition.

Normal operation.

Error Condition/
Recommended Action

If the LED is not lit, the
EMM-E6 may not be
receiving power. See the
Troubleshooting Checklist.

Press the Reset switch on
the EMM-E6 front panel to
re-initialize the board. This
may clear the error. If the
board does not re-initialize, it
has probably failed. Call
Cabletron Systems Technical
Support.

EMM-E6 Installation Guide 4-1

Chapter 4: Troubleshooting

Table 4-1 LANVIEW LED Messages (Continued)

LED Color Description

Indicates packets
will not be
forwarded for one
of two reasons:
Either the Spanning
Tree Algorithm has
put the
corresponding

STBY Amber

RCV Amber

Bridge Port into a
standby mode due
to detecting a data
loop condition, or
the bridging
functionality for the
port has been
disabled through
management.

LED flashes to
indicate that a
segment is
receiving a frame.

Error Condition/
Recommended Action

Check with your Network
Administrator to find out if
the EMM-E6 was placed
intentionally in standby
mode.

If a Data loop does exist,
reconfigure the network to
remove the data loop.

If none of the receive LEDs
is flashing, the EMM-E6 is
not receiving frames on any
of the segments.

Check that each module is
firmly installed in the MMAC.

Ensure that all connected
ports are enabled.

4-2 EMM-E6 Installation Guide

Using LANVIEW LED

Table 4-1 LANVIEW LED Messages (Continued)

S

LED Color Description

LED flashes to
indicate that a
segment is
transmitting a
frame.

XMT Green

CLN Red

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

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

Error Condition/
Recommended Action

If none of the transmit LEDs
are flashing, the EMM-E6 is
not transmitting frames on
any of the segments.
Ensure that the network is
actually producing Ethernet
traffic. Contact Cabletron
Systems T echnical Support
for assistance.

Excessive flashing, or a solid
light, indicates an inordinate
number of collisions.
Ensure that the SQE test is
disabled for any transceiver
connected to the EMM-E6
external channels (D, E, or
F). Check cabling for data
loops or defective cables.

EMM-E6 Installation Guide 4-3

Chapter 4: Troubleshooting

4.2 TROUBLESHOOTING CHECKLIST

If your EMM-E6 is not operating properly, the following checklist
describes some of the problems that may occur with the EMM-E6
installed in an MMAC, possible causes for the problem, and suggestions
for resolving the problem.

Table 4-2 Troubleshooting Checklist

Condition Possible Cause Recommended Action

Check the proper installation of the
MMAC power supply module and
its access to a live outlet. Check
power cables for viability.

Check that the MMAC has
Loss of power to
the MMAC.

adequate power. Some

configurations, especially those

including FDDI modules, require

that more than one power supply

be installed in the MMAC.

All LEDs are off.

No Local
Management
Password Screen.

EMM-E6 not
properly
installed.

EMM-E6
connector pin
damage.

MMAC power
bus failure.

Incorrect
terminal setup.

Improper
console cable
pinout.

Check to see that all power supply

LEDs are green.

Re-install EMM-E6 in hub

according to instructions in

Chapter 3.

Examine EMM-E6 backplane

connectors for evidence of bent or

broken pins.

Contact Cabletron Systems

Technical Support.

Review terminal or emulation

settings for accordance with

requirements.

Refer to Appendix A for proper

console port pinouts.

4-4 EMM-E6 Installation Guide

Troubleshooting Checklist

Table 4-2 Troubleshooting Checklist (Continued)

Condition Possible Cause Recommended Action

Cannot contact
the EMM-E6 from
in-band
management.

A port on a MIM
managed by the
EMM-E6 cannot
access the
network, while
other ports on the
same MIM are
able to access.

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

Improperly
configured
Community
Names table.

EMM-E6 does
not have an IP
address.

No link to
device.

Frames are
being bridged by
a permanent
entry.

The port is
either off or
segmented.

Port cable is
defective.

Switch 7 has
been toggled
and
user-entered
parameters
have been reset
to factory
default.

NVRAM may be
defective.

Refer to

Management Guide

Community Names table setup.

Refer to

Management Guide

Setup Screen information.
Check link to device f or validity and

proper functioning of all
intermediary devices.

Check Static Database.

Enable the port via local or remote
management.

Try connecting the port with a
different cable.

Reset one or more parameters and
cycle power to module. If
parameter altered has remained in
memory, re-configure remaining
parameters.
position of switch 7 to attempt to
rectify this situation. See Chapter
3, Installation, for details.

If NVRAM is defective, call
Cabletron Systems Technical
Support.

EMM-E6 Local

for

EMM-E6 Local

for IP address

Do not

change the

EMM-E6 Installation Guide 4-5

Chapter 4: Troubleshooting

Table 4-2 Troubleshooting Checklist (Continued)

Condition Possible Cause Recommended Action

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

High number of
collisions on EPIM
port.

Ports go into
standby for no
apparent reason.

AUI cable is
defective.

EPIM is
defective or
improperly
installed.

External
transceiver has
SQE enabled.

Configurations
where devices
connected
across EMM-E6
channels can
cause the
EMM-E6 to
detect a looped
condition.

Replace AUI cable.

Replace EPIM. See Chapter 3,

Installation, for details.

Disable SQE.

Discuss these configurations with

Cabletron Technical Support

before implementing them into

your network.

4-6 EMM-E6 Installation Guide

Using the Reset Switch

4.3 USING THE RESET SWITCH

The EMM-E6 incorporates a recessed reset switch, located above the
LANVIEW LEDs (See Chapter 2, Controls and Indicators, for
location). This reset switch initializes the EMM-E6 processor . This switch
does not initialize Non-Volatile Random Access Memory (NVRAM), the
non-volatile random access memory where the EMM-E6 stores network
management parameters.

To use the reset switch, use a pen or pencil to press the switch in. When
this is done, the EMM-E6 initializes itself.

NOTE

The reset sequence for the EMM-E6 may last approximately
one minute. The final time may change depending upon the
configuration of the chassis in which the EMM-E6 is located.
Only after the reset sequence is completed will internetworking
operations resume.

EMM-E6 Installation Guide 4-7

Chapter 4: Troubleshooting

4-8 EMM-E6 Installation Guide

APPENDIX A

SPECIFICATIONS

This appendix lists some of the important specifications and specified
requirements for the EMM-E6. Cabletron Systems reserves the right to
change these specifications at any time and without notice.

A.1 PHYSICAL SPECIFICATIONS

Dimensions: 29.21 H x 7.64 W x 34.07 D cm

(11.5 H x 3 W x 13.4 D in)
Weight (unit): 1.25 kg (2.75 lbs)
Weight (as shipped): 1.74 kg (3.83 lbs)

A.2 OPERATING SPECIFICATIONS

Internal Processor(s): Intel 80960
Ethernet Controller: 4 DP83932 Controllers
Shared Memory: 4 MB (Expandable to 12 MB)
Read Only Memory (NVRAM): 128 K
FLASH Memory: 2 MB (Expandable to 14 MB)
CPU Memory (Local Memory): 8 MB (4 MB + 4 MB SIMM)

(Expandable to 12 MB)
Filtering Table: 8,191 entries maximum
Aging Time: 5 minutes (default)

EMM-E6 Installation Guide A-1

Appendix A: Specifications

A.3 ENVIRONMENTAL REQUIREMENTS

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

A.4 CERTIFICATION

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

IEC 950

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

EN 55022 Class A
Immunity: EN 50082-1
This unit has been tested by Bellcore and found to comply with the

following Bellcore standards:
TR-NWT-000063 Network Equipment Building System (NEBS)

Generic Equipment Requirements
GR-1098-CORE EMC and Electrical Safety Generic Criteria for

Network Telecommunications Equipment

A.5 COM PORT PINOUT

Type: Standard RJ45 port

Pin Function Connection Attitude

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) NA
6 Data Terminal Ready (DTR) From COM 2 port
7 Request to Send (RTS) To COM 2 port
8 Clear to Send (CTS) NA

A-2 EMM-E6 Installation Guide

APPENDIX B

UPGRADING THE EMM-E6

This appendix describes how to incorporate additional or expanded
capabilities into the EMM-E6. This appendix describes the procedures for
the addition of a BRIM or EPIM module and the addition of Single
In-line Memory Modules (SIMMs).

B.1 LOCATING BRIM CONNECTORS

This section points out Bridge Router Interface Module (BRIM)
connector locations on your EMM-E6 board. Refer to your BRIM Guide
for specific installation procedures and additional information.

The following diagram (Figure B-1) shows BRIM connector locations for
the EMM-E6:

Channel E BRIM Connector

BRIM-F Ribbon Connector

LSI

Logic

Logic

LSI

1926n15

Channel F BRIM Connector

Figure B-1 BRIM Connector Locations

EMM-E6 Installation Guide B-1

Appendix B: Upgrading the EMM-E6

B.2 ADDING EPIMS

This section contains procedures for adding or replacing an Ethernet
Port Interface Module (EPIM) to upgrade or change the capabilities of
your EMM-E6. After installing your new EPIM, refer to Chapter 3,
Installation, for network connection instructions.

NOTE

CAUTION

The EMM-E6 EPIM slots are designed to provide redundancy.
Only one EPIM will be active at any time. The inactive EPIM
port will be held in standby , and will be immediately activ ated in
the event of a filure ofthe primary EPIM port.

Observe all antistatic precautions when handling sensitive
electronic equipment.

!

To install an EPIM, perform the following steps:

When removing an existing EPIM, make sure to pull the
module straight out to avoid damage to the connector.

!

CAUTION

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

2. Slide your new EPIM into place, making sure the connectors on the

rear of the module and inside the EMM-E6 attach properly. Refer to
Figure B-2.

3. Secure the EPIM to the EMM-E6 by tightening the mounting screw.

Mounting

Screw

LNK

EPIM

1926n16

Figure B-2 Installing an EPIM

B-2 EMM-E6 Installation Guide

SIMM Upgrades

B.3 SIMM UPGRADES

The EMM-E6 allows memory upgrades for Shared DRAM, Local
DRAM, and FLASH EEPROM. This section explains how to locate and
add/replace a Single In-line Memory Module (SIMM) for any of these
memory types. For information on the available SIMM upgrades and
information on ordering them, contact your Cabletron Systems Sales
Representative.

B.3.1 Locating SIMMs

Each memory type has a specific SIMM slot location on the EMM-E6
motherboard. When installing SIMM boards, make sure that you place
them in their proper slots. Figure B-3 illustrates the EMM-E6 SIMM slot
locations and the direction (indicated by the white arrow) in which to
install the SIMMs.

These slots are shipped populated

FLASH SIMM SlotLDRAM SIMM Slot

LSI

Logic

Direction of

Insertion

1926n17

SDRAM SIMM Slot

Figure B-3 SIMM Slot Locations

EMM-E6 Installation Guide B-3

Appendix B: Upgrading the EMM-E6

B.3.2 Installing SIMMs

The EMM-E6 uses an angle-down slot (where the SIMM rotates down to
a horizontal locked position). Installing a SIMM in any slot is a simple
two-step process. After finding the proper SIMM slot location
(Figure B-3), refer to the procedures below.

Observe all antistatic precautions when handling sensitive
electronic equipment.

!

CAUTION

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

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

and the SIMM holes fit over the SIMM slot posts. (See Figure B-4.)

SIMM Slot

Connector

Teeth

Clips

1

2

SIMM

SIMM Hole

Figure B-4 Installing a Horizontal SIMM

B-4 EMM-E6 Installation Guide

SIMM Slot

Post

Alignment Notch

1926n18

APPENDIX C

ETHERNET CABLING REQUIREMENTS

This chapter contains general networking guidelines. Before attempting
to install the EMM-E6 or any additional EPIMs or BRIMs, review the
requirements and specifications outlined in this chapter.

NOTE

Your network installation must meet the conditions, guidelines,
specifications, and requirements included in this chapter to
ensure satisfactory performance of this equipment. Failure to
follow these guidelines may result in poor network
performance.

C.1 NETWORK 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 which follow that apply to your specific network
configuration.

C.1.1 10BASE-T Twisted Pair Network

When connecting a 10BASE-T segment to an EMM-E6 (using 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 the maximum link length to 200 meters.

NOTE

EMM-E6 Installation Guide C-1

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.

Appendix C: Ethernet Cabling Requirements

• 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 products work on twisted

pair cable with 75 to 165 ohms impedance. Unshielded Twisted Pair
cables typically have an impedance of between 85 and 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 the subsequent lack of crosstalk
between shielded pairs, 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 se gment

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, provided 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.

C-2 EMM-E6 Installation Guide

Network 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 the EMM-E6
(using an EPIM-F1/F2), ensure the network meets the following
requirements:

• Cable T ype: Use 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 that the signal loss in 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.

EMM-E6 Installation Guide C-3

Appendix C: Ethernet Cabling 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 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 or switches.

• Length: The maximum possible multimode fiber optic cable length is

2 Km (1.24 miles). However, IEEE 802.3 FOIRL specifications
specify a maximum of 1 Km (0.62 miles).

C.1.3 Single Mode Fiber Optic Network

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

• Cable T ype: Fiber optic link segments should consist of 8/125 or

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 a maximum

fiber optic cable length, you must calculate and consider the fiber optic
budget (a total loss of 10.0 dB or less 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.

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 or switches to re-time the
signal.

C-4 EMM-E6 Installation Guide

Network Requirements

• Length: If you meet all system budgets, the maximum single mode

fiber optic cable length can reach 5 Km (3.1 miles) with bridges or
switches at each segment end. FOIRL specifications specify a
maximum of 1 Km (0.62 miles).

C.1.4 10BASE2 Coaxial Cable Network

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

• Cable T ype: Use only 50 ohm RG-58 A/U type coaxial cable for thin

coaxial cable segments.

• Length: The thin coaxial cable segment must not exceed 185 meters.

• Terminators: Terminate each end of a thin coaxial cable segment.

• Connectors: You can use up to 29 T-connectors throughout the length

of the cable segment for host connections. Ensure that all connections
are spaced 0.5 meters or more from one another or from terminators.

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 information, contact Cabletron Systems Technical Support.

• Grounding: For safety, ground only one end of a thin coaxial cable

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

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

C.1.5 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.

EMM-E6 Installation Guide C-5

Appendix C: Ethernet Cabling Requirements

C-6 EMM-E6 Installation Guide

INDEX

Numerics

10BASE2

connection 3-18
grounding C-5
link length C-5
specifications C-5

10BASE-F

attenuation

multimode C-3

single mode C-4
connecting 3-13, 3-15
link length

multimode C-4

single mode C-5
specifications C-3

10BASE-T

connecting 3-10
impedance C-2
insertion loss C-2
link length C-1
specifications C-1

A

Alignment sleeves 3-15
Attenuation

10BASE-F

multimode C-3

single mode C-4
10BASE-T C-3

AUI

connection 3-17

B

BNC connector

usage 3-18

BRIM slot

locating connectors B-1
location 2-2

C

Cable requirements C-1
Coaxial cable - see 10BASE2
COM port - see Serial port
Crosstalk C-2

D

Dimensions A-1
Dip switches - see Mode switches
Document control numbers 1-3

E

Environmental specifications A-2
EPIM slot

adding EPIMs B-2
connector 2-4
location 2-2

F

Faceplate components 2-1
Fiber optics - see 10BASE-F
FLASH memory

SIMM slot location 2-5

Forced download 3-4

G

Grounding

10BASE2 C-5

H

Heartbeat - see SQE
Humidity requirements A-2

I

Impedance

10BASE-T C-2

Insertion loss

10BASE-T C-2
Installation 3-7 to 3-9
Internal components 2-2

EMM-E6 Installation Guide Index-1

Index

K

Knurled knobs 2-1

L

LANVIEW LEDs

identification 2-6
location 2-2
using 4-1

LDRAM

SIMM slot location 2-5

Link length

10BASE2 C-5
10BASE-F

multimode C-4
single mode C-5

10BASE-T C-1

M

Memory

EEPROM 2-5
Local Dynamic 2-5
Shared Dynamic 2-4
upgrading B-3

Mode switches

location 2-3
setting 3-3 to 3-5

N

NVRAM reset 3-4

S

Safety requirements A-2
SDRAM

SIMM slot 2-4
SIMM slot location 2-4

Serial port

location 2-2
pinout A-2

SIMMs

installing B-4
location B-3

SMA connectors

usage 3-15
Specifications A-1
SQE test 3-17

T

T-connector C-5
T-connector 3-18
Temperature requirements A-2
Testing

post-installation 3-20

pre-install 3-5
Troubleshooting

checklist 4-4

W

Weight A-1

P

Password defaults 3-5
Pinouts

RJ45 3-11

Problems

troubleshooting 4-4

Propagation delay C-2, C-3

R

Reference formats 1-3
Reset switch 4-7

using 4-7

RJ45 pinouts 3-11

Index-2 EMM-E6 Installation Guide

Quick Reference Card

LANVIEW LEDs

EMM-E6

RESET

CPU

ABCD

STBY

RCV
XMT
CLN

LED Description

CPU

STBY
(A, B, C, or D)

RCV
(A, B, C, or D)

XMT
(A, B, C, or D)

CLN
(A, B, C, or D)

Green (Flashing): Operating properly.
Red: CPU error condition.
Amber: Spanning Tree Algorithm has placed

corresponding port in standby mode or the
port has been placed in standby mode through
management operations.

Amber: Indicates that the associated port is
receiving a frame.

Green: Indicates that the associated port is
transmitting frames.

Red: Lights to indicate a collision has occurred
on the corresponding Ethernet segment.

1926n04

Installation

Any installation operations must be performed only by qualified
personnel.

NOTE

We recommend powering down your MMAC when inserting or
removing modules, even though Cabletron Systems modules
have “hot swap” capabilities.

1. Power down the MMAC.

2. Remove any safety bars that protect the chassis and remove the
module to be replaced or blank MMAC slot covers, in accordance with
the installation and removal procedures for these items.

3. Slide the EMM-E6 into slots 1 and 2 of the MMAC as shown below.

1926n07

Module Guide Channels

4. Secure the module by tightening the knurled knobs at the top and
bottom of the module.

5. Replace the safety bars on the MMAC chassis.

6. Power on the MMAC chassis.