Cabletron Systems SEHI-22FL User Manual

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SEHI-22FL

INTELLIGENT STACKABLE HUB

USER’S GUIDE

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: 9031652-01 April 1996

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

All other product names mentioned in this manual may be trademarks or registered trademarks of their respective companies.

, and

TMS-3

Printed on Recycled Paper

, and

BRIM

are registered trademarks and

are trademarks of Cabletron Systems, Inc.

Element

SEHI User’s Guide i

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Notice

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

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.

ii SEHI User’s Guide

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Notice

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.

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

SEHI User’s Guide iii

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Notice

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.

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CHAPTER 1 INTRODUCTION

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

1.2 Document Conventions...............................................................1-2

1.3 Getting Help.................................................................................1-3

1.4 Related Manuals..........................................................................1-3

CHAPTER 2 SEHI FEATURES AND OPTIONS

2.1 SEHI Overview............................................................................2-2

2.2 SEHI Features............................................................................. 2-2

2.3 Stackable Capabilities.................................................................2-3

2.4 Remote Network Management Capabilities................................2-3

2.5 Optional Features........................................................................ 2-4

CHAPTER 3 INSTALLATION REQUIREMENTS AND

SPECIFICATIONS

3.1 Cable Specifications.................................................................... 3-1

3.1.1 HubSTACK Interconnect Cable Requirements............... 3-2

3.1.2 10BASE-FL Fiber Optic Network Requirements............. 3-2

3.1.3 10BASE-T UTP and STP Cable Specifications..............3-3

3.2 Network Port Specifications.........................................................3-4

3.3 COM Port Requirements.............................................................3-5

3.4 Transceiver Requirements ..........................................................3-5

3.5 Operating Specifications..............................................................3-6

3.6 Power Supply Requirements....................................................... 3-7

3.7 Environmental Requirements......................................................3-8

3.8 Agency Approvals........................................................................3-8

3.8.1 Safety.............................................................................. 3-8

3.8.2 Immunity ......................................................................... 3-8

3.8.3 Emission ......................................................................... 3-8

3.9 Physical Specifications................................................................ 3-8

SEHI User’s Guide v

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Contents

CHAPTER 4 INSTALLATION

4.1 Unpacking the SEHI.....................................................................4-1

4.2 Pre-installation Test .....................................................................4-2

4.3 Installing the SEHI .......................................................................4-2

4.3.1 Tabletop or Shelf Installation...........................................4-3

4.3.2 Rackmount Installation....................................................4-4

4.3.3 Stacking the SEHI...........................................................4-6

4.4 Connecting the SEHI to the Power Source..................................4-8

4.5 Adding/Replacing EPIMs .............................................................4-9

CHAPTER 5 CONNECTING TO THE NETWORK

5.1 Connecting the SEHI to the Network ...........................................5-1

5.1.1 Connecting Network Ports...............................................5-1

5.1.2 Connecting a UTP Segment to an EPIM-T .....................5-4

5.1.3 Connecting a Fiber Segment to an EPIM-F1/F2/F3........5-5

5.1.4 Connecting a Thin Coaxial Segment to an EPIM-C........5-8

5.1.5 Connecting an AUI Cable to an EPIM-A .........................5-9

5.1.6 Connecting an AUI Cable to an EPIM-X .......................5-11

5.2 FInishing the Installation ............................................................5-12

CHAPTER 6 TROUBLESHOOTING

6.1 Installation CheckOut...................................................................6-1

6.2 Using LANVIEW...........................................................................6-2

6.3 Using the RESET Button .............................................................6-4

6.4 Setting the NVRAM Switch ..........................................................6-5

CHAPTER 7 LOCAL MANAGEMENT

7.1 Local Management Keyboard Conventions.................................7-2

7.2 Management Terminal Setup.......................................................7-3

7.3 Accessing Local Management.....................................................7-6

7.4 The Feature Selection Screen .....................................................7-7

7.5 The Community Name Table Screen...........................................7-8

7.6 The Configuration Screen..........................................................7-10

7.7 The Trap Table Screen..............................................................7-14

7.8 The SNMP Tools Screen ...........................................................7-16

7.9 The Device Statistics Screen.....................................................7-20

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Contents

APPENDIX A EPIM INFORMATION

A.1 EPIM Specifications.....................................................................A-1

A.1.1 EPIM-T............................................................................A-1

A.1.2 EPIM-F1 and EPIM-F2....................................................A-2

A.1.3 EPIM-F3..........................................................................A-3

A.1.4 EPIM-C............................................................................A-4

A.1.5 EPIM-A and EPIM-X (AUI Port) ......................................A-5

APPENDIX B IMAGE FILE DOWNLOAD USING OIDs

B.1 Setting up a UNIX Workstation as a TFTP Server ......................B-2

B.2 Standard TFTP Download...........................................................B-3

INDEX

SEHI User’s Guide vii

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CHAPTER 1

INTRODUCTION

Welcome to the Cabletron Systems

Hub User’s Guide

reference information for the SEHI-22FL.

NOTE

The term SEHI (Stackable Ethernet Hub with Intelligence) is used throughout this manual when describing the features and functions of the SEHI-22FL.

. This manual provides installation instructions and

SEHI-22FL Intelligent Stackable

1.1 USING THIS MANUAL

Read through this manual to gain an understanding of the features and capabilities of the SEHI. A general knowledge of Ethernet and IEEE

802.3 type data communications networks and their physical layer

components is helpful when installing the SEHI. Chapter 1,

document conventions, provides getting help information and concludes with a list of related manuals.

Chapter 2, and provides information about available options including EPIMs (Ethernet Port Interface Modules) and HubSTACK interconnect cables.

Chapter 3, installation requirements, network guidelines, and SEHI operating speciﬁcations.

Introduction

SEHI Features and Options

Installation Requirements and Specifications

, outlines the contents of this manual, describes

, details the features of the SEHI

, describes

Chapter 4, stackable or standalone hub.

Chapter 5, SEHI to the network using the various media types.

Chapter 6, to troubleshoot network problems.

SEHI User’s Guide 1-1

Installation

Connecting to the Network

Troubleshooting

, contains instructions for installing the SEHI as a

, explains how to connect the

, describes how to use the LANVIEW LEDs

Page 10

Chapter 1:

Introduction

Chapter 7,

Local Management

, describes how to use SEHI Local

Management screens and the available commands. Appendix A,

EPIM Information

, provides speciﬁcations, cabling

information, and switch settings for the Ethernet Port Interface Modules. Appendix B,

Image File Download Using OIDs

, provides instructions for setting up a TFTP server and downloading image ﬁles to the SEHI by setting speciﬁc MIB OID strings.

1.2 DOCUMENT CONVENTIONS

The following conventions are used throughout this document:

Note

NOTE

TIP

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

damage to the equipment.

CAUTION

Warning

equipment damage, personal injury or death.

1-2 SEHI User’s Guide

symbol. Contains information essential to avoid

symbol. Warns against an action that could result in

Page 11

Getting Help

1.3 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

A.M

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

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.)

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

. – 8 P.M. Eastern Time

• 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 RELATED MANUALS

Use the Cabletron Systems supplement the procedures and other technical data provided in this manual. The procedures contained in the

User’s Guide

are referenced where appropriate, but not repeated in this

manual.

SEHI User’s Guide 1-3

SEH-22FL Stackable Hub User’s Guide

SEH-22FL Stackable Hub

Page 12

CHAPTER 2

SEHI FEATURES AND OPTIONS

This chapter provides an overview of the SEHI-22FL and contains sections detailing features and available options.

NOTE

HubSTACK SEHI-22FL

The term SEHI (Stackable Ethernet Hub with Intelligence) is used throughout this manual when describing features and functions of the SEHI-22FL.

FRONT VIEW

10BASE-FL HUB WITH LANVIEW

PWR

CPU

RCV LNK

COM

CLN

12 11 10 9 8 7 6 5 4 3 2 1

RESET

Port Status LEDs System LEDs COM Port RESET Button

Power Supply ON/OFF Switch

SECURE

REAR VIEW

1112

E 1

Network Ports 1-12

SEHI-22FL 100BASE-FL HUB WITH LANVIEW®

SEH INTERCONNECT

OUT

Interconnect Bus "OUT" Port

EPIM Slot

EPIM 1

165212

Figure 2-1 Front and Rear Views of the SEHI-22FL

SEHI User’s Guide 2-1

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Chapter 2:

SEHI Features and Options

2.1 SEHI OVERVIEW

The SEHI-22FL is an intelligent repeating hub providing front panel ports for network connections and a rear panel HubSTACK Interconnect Bus port for stackable connections. The SEHI is designed to manage the Cabletron Systems SEH series of non-intelligent stackable hubs.

The SEHI-22FL provides twelve 10BASE-FL ST-type ﬁber optic ports and one EPIM (Ethernet Port Interface Module) port.

2.2 SEHI FEATURES

This section provides detailed information about SEHI features and capabilities.

Repeater Functionality

The SEHI fully conforms to the IEEE 802.3 10BASE-FL speciﬁcations, and provides the ﬂexibility to connect networks using IEEE 802.3, Ethernet Version 1 or Version 2 equipment. The SEHI transmits retimed data packets, regenerates the preamble, extends fragments, and arbitrates collisions.

The SEHI automatically partitions problem segments, and reconnects repaired segments to the network. This feature minimizes the impact on network operation resulting from a problem on one segment by isolating the problem segment. Only devices on the problem segment are affected. When the problem is solved, the SEHI automatically reconnects the isolated segment to the network.

FLASH EEPROMs

The SEHI uses FLASH EEPROMs that allow the downloading of new and updated ﬁrmware using Cabletron Systems SPECTRUM Element Manager/Windows or any device using BOOTP or TFTP protocols.

LANVIEW LEDs

Cabletron Systems LANVIEW Status Monitoring and Diagnostics System is a troubleshooting tool that helps in diagnosing power failures, collisions, cable faults, and link problems. The LANVIEW LEDs are conveniently located on the SEHI front panel.

2-2 SEHI User’s Guide

Page 14

Stackable Capabilities

RESET Button

Resetting the hub with the front panel RESET button reboots the SEHI and initializes the processor.

Local Management

Manage the SEHI and attached segments through Local Management on the SEHI. Local Management provides full packet and error statistics for the entire stack, individual device, or individual port. Access Local Management by attaching a DEC VT320 terminal or a PC using VT320 emulation software to the SEHI RJ45 COM port.

2.3 STACKABLE CAPABILITIES

The SEHI intelligent hub is designed to manage the Cabletron Systems series of SEH non-intelligent hubs. The SEHI serves as the logical “top” of the stack. It manages all SEH hubs in the stack providing full packet and error statistics for the entire stack, individual device, or individual port.

Stack up to four SEH non-intelligent hubs with one SEHI using Cabletron Systems external HubSTACK Interconnect cables. Stackable conﬁgurations make it possible to maintain only one IEEE repeater hop while providing up to 130 10BASE-T Ethernet ports. Add or remove hubs from the stack without powering down.

2.4 REMOTE NETWORK MANAGEMENT

CAPABILITIES

Manage the SEHI remotely with any SNMP network management system. Cabletron Systems offers the following remote management packages:

• Cabletron Systems SPECTRUM

• Cabletron Systems SPECTRUM Element Manager/Windows

• Cabletron Systems Remote SPECTRUM Portable Management

Applications

• Third Party SNMP compliant Network Management Packages

SEHI User’s Guide 2-3

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Chapter 2:

SEHI Features and Options

2.5 OPTIONAL FEATURES

The following features are not included with the SEHI, but are purchased separately from Cabletron Systems.

Ethernet Port Interface Modules (EPIMs)

EPIMs enable the expansion of the network through a variety of media. Cabletron Systems offers the EPIMs shown in Table 2-1.

Table 2-1 EPIMs

EPIM Media Type Connector

EPIM-A AUI DB15 (Female) EPIM-C 10BASE2 Thin Coaxial BNC

EPIM-T EPIM-X Standard T r ansceiver DB15 (Male)

EPIM-F1 Multimode Fiber SMA EPIM-F2 Multimode Fiber ST EPIM-F3 Single Mode Fiber ST

10BASE-T Unshielded Twisted Pair

RJ45

HubSTACK Interconnect Cables

Stack hubs together with Cabletron Systems HubSTACK Interconnect cables. Table 2-2 lists the part number and the application for each cable.

Table 2-2 HubSTACK Interconnect Cables

P/N Description Application

9380110

9380111

12" HubSTACK Interconnect Cable

18" HubSTACK Interconnect Cable

SEH to SEH connections.

SEHI to SEH connections.

Rack Mount Hardware

The SEHI can be installed in a 19-inch rack. Cabletron offers an accessory package that includes brackets and mounting screws. The part number for the accessory package is SEHI-ACCY-KIT.

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Page 16

CHAPTER 3

INSTALLATION REQUIREMENTS AND

SPECIFICATIONS

This chapter describes cabling requirements, network guidelines, and operating speciﬁcations for the SEHI.

The network must meet the requirements and conditions speciﬁed in this chapter to obtain satisfactory performance from

CAUTION

The network must meet the requirements and conditions speciﬁed in this chapter to obtain satisfactory performance from this equipment. Failure to follow these guidelines can result in poor network performance.

3.1 CABLE SPECIFICATIONS

The SEHI-22FL network ports support 10BASE-FL Multimode Fiber Optic cabling.

this equipment. Failure to follow these guidelines can result in poor network performance.

Ethernet Port Interface Modules (EPIMs) expand a network using Unshielded Twisted Pair (UTP), Shielded Twisted Pair (STP), Multimode Fiber Optic, Single Mode Fiber Optic, or Thin Coaxial cabling. For information concerning EPIMs, refer to Appendix A.

The rear panel Interconnect Bus port supports Cabletron Systems HubSTACK Interconnect cables for stackable applications.

T ak e care in planning and preparing the network cabling and connections. The quality of the connections and the length of cables are critical factors in determining the reliability of the network. The following sections provide the speciﬁcations for each media type.

SEHI User’s Guide 3-1

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Chapter 3: Installation Requirements and Speciﬁcations

3.1.1 HubSTACK Interconnect Cable Requirements

Attach the SEHI to modules in the stack with the SEHI HubSTACK Interconnect cable available only from Cabletron Systems. Refer to Chapter 1 for cable part numbers. The cable attaches to the SEHI rear panel bus port.

The rear panel of the SEHI has an Interconnect Bus Out port (male connector) to stack SEH non-intelligent hubs together. Stack up to four SEH hubs together with one SEHI.

3.1.2 10BASE-FL Fiber Optic Network Requirements

Table 3-1 shows Multimode Fiber Optic Cable speciﬁcations for the SEHI-22FL.

Table 3-1 Multimode Fiber Optic Cable Speciﬁcations

Cable Type Attenuation Maximum Cable Length

50/125 µm 13.0 dB or less Maximum ﬁber optic cable length is 2

62.5/125 µm 16.0 dB or less 100/140 µm 19.0 dB or less

km (2187.2 yds). However, IEEE 802.3 speciﬁcations allow for a maximum of 1 km (1093.6 yds).

Attenuation

T est 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 is within an acceptable level. Table 3-1 shows the attenuation for each Multimode cable type.

Fiber Optic Budget and Propagation Delay

Determine the maximum ﬁber optic cable length by calculating the ﬁber optic budget delay and total network propagation before the ﬁber optic cable runs are incorporated into a network design.

Fiber optic budget is the combination of the optical loss due to the ﬁber optic cable, in-line splices, and ﬁber optic connectors.

Propagation delay is the amount of time it takes data to travel from the sending device to the receiving device. Total propagation delay allowed for the network is 25.6 µs (51.2 µs roundtrip). If the total propagation delay between any two nodes on the network exceeds 25.6 µs, then use bridges.

3-2 SEHI User’s Guide

Page 18

Cable Speciﬁcations

3.1.3 10BASE-T UTP and STP Cable Speciﬁcations

The devices and 10BASE-T Twisted Pair Segments connected to an SEHI EPIM-T module must meet the IEEE 802.3 10BASE-T speciﬁcations shown below:

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 (UTP) wire. However, cable quality largely determines the maximum link length. With high quality, low attenuation cable, link lengths of up to 200 meters are achievable. Cable delay limits the maximum link length to 200 meters, regardless of the cable type.

Insertion Loss

The maximum insertion loss allowed for a 10BASE-T link is 11.5 dB at all frequencies between 5.0 and 10 MHz. 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. UTP cables typically have an impedance of 85 to 110 ohms.

Shielded Twisted Pair (STP) cables, such as IBM Type 1 cable, are also used. The impedance of IBM Type 1 cable is typically 150 ohms. Higher impedance increases signal reﬂection, but because the cable is shielded, signal reﬂection has little effect on the quality of the received signal due to the lack of crosstalk between the shielded cable pairs.

Jitter

Intersymbol interference and reﬂections cause jitter in the bit cell timing, resulting in data errors. A 10BASE-T link must not generate more than

5.0 ns of jitter. If the cable meets the impedance requirements for a 10BASE-T link, jitter should not be 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.

SEHI User’s Guide 3-3

Page 19

Chapter 3: Installation Requirements and Speciﬁcations

Crosstalk

Crosstalk is caused by signal coupling between the different cable pairs contained within a multi-pair cable bundle. 10BASE-T transceivers are designed so that the user does not need to be concerned about cable crosstalk, provided the cable meets all other requirements.

Noise

Noise is caused by either crosstalk or externally induced impulses. Impulse noise may cause data errors if the impulses occur at very speciﬁc times during data transmission. Generally , the user need not be concerned about noise. If noise-related data errors are suspected, it may be necessary to either reroute the cable or eliminate the source of the impulse noise.

Temperature

Multi-pair PVC 24 AWG cables typically have an attenuation of 8 dB to 10 dB/100 meters at 20°C (68°F). The attenuation of PVC insulated cable varies signiﬁcantly with temperature. At temperatures greater than 40°C (104°F), Cabletron Systems recommends the use of plenum-rated cables to ensure that cable attenuation remains within speciﬁcation.

3.2 NETWORK PORT SPECIFICATIONS

The SEHI-22FL provides ST-type ports for 10BASE-FL Multimode Fiber Optic cabling. Figure 3-1 shows the network ports.

1112

Figure 3-1 SEHI-22FL Network Ports

3-4 SEHI User’s Guide

09162_04

Page 20

COM Port Requirements

3.3 COM PORT REQUIREMENTS

The RJ45 COM port supports access to a Local Management Console. The Console port supports a Digital Equipment Corporation, VT320 terminal or PC emulation of the VT320 terminal. Figure 3-2 shows the pinouts for the RJ45 COM port.

1 2 3 4 5 6 7 8

COM

1. Transmit Data

2. Data Carrier Detect

3. Data Set Ready

4. Receive Data

Figure 3-2 COM Port Pinouts

5. Signal Ground

6. Data Terminal Ready

7. Request To Send

8. Clear To Send

165201

3.4 TRANSCEIVER REQUIREMENTS

When connecting an external network segment through a transceiver to the SEHI with an EPIM-A, the following requirements must be met:

• The transceiver or Ethernet device to which the module is connected

must meet IEEE 802.3 standards, and/or Ethernet Version 1.0 or Version 2.0 standards.

• The Signal Quality Error (SQE) test function on the transceiver must

be disabled when it is connected to a repeater or to an Ethernet Version

1.0 device. In addition, some Version 2.0 equipment does not support the SQE test. Devices that do not support the SQE test interpret the SQE test pulse as a collision.

SEHI User’s Guide 3-5

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Chapter 3: Installation Requirements and Speciﬁcations

3.5 OPERATING SPECIFICATIONS

The operating speciﬁcations for the SEHI are described in this section. Cabletron Systems reserves the right to change these speciﬁcations at any time without notice.

System Speciﬁcations

Operating System Memory: 1.5 MB Internal Processor: Intel i960 operating at 16 MHz Ethernet Controller: National Semiconductor DP83916 Non-Volatile RAM: 32 KB with battery back-up EPROM: 64 KB FLASH MEMORY: 1 MB

Delay Time (Start of Packets) Speciﬁcations

Twisted Pair to EPIM-A: 1.10 ms Twisted Pair to Twisted Pair: 1.00 ms EPIM-A to Twisted Pair: 1.00 ms

Delay Times (JAM) Speciﬁcations

Twisted Pair to EPIM-A: 960 ns

Preamble Speciﬁcations

Input: Minimum of 40 bits required Output: 64 bits min. (last 2 bits are 1,1)

3-6 SEHI User’s Guide

Page 22

Power Supply Requirements

JAM Output Speciﬁcations

Collisions are propagated through the network using the J AM signal of an alternating pattern of 1’s and 0’s in accordance with 802.3 speciﬁcations for a repeater unit.

Fragment Extension Speciﬁcations

Fragments are extended to a minimum of 96 bits using the JAM [1,0].

Fault Protection Speciﬁcations

Each segment disconnects itself from the other segments if 32 consecutiv e collisions occur, or if the collision detector of a segment is on for longer than approximately 110 µs. This fault protection resets automatically after one packet is transmitted/received onto the fault protected segment without causing a collision.

3.6 POWER SUPPLY REQUIREMENTS

The SEHI has a universal power supply. The input power requirements are listed in Table 3-2.

Table 3-2 Power Requirements

Model Voltage Range Frequency Range

SEHI-22FL

100–125 Vac or 200–250 Vac

50/60 Hz

The power supply has two outputs of +5 Vdc and +12 Vdc. The maximum output power is 40 W and the minimum efﬁciency is 65% under all conditions of the line at full load. The minimum and maximum load currents from each output are listed in Table 3-3.

Table 3-3 Power Supply Output Speciﬁcations

Output Min. Load Max. Load Max Power

+5 Vdc 0.75 A 4 A 20 W +12 Vdc 0.00 A 2 A 24 W

SEHI User’s Guide 3-7

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Chapter 3: Installation Requirements and Speciﬁcations

3.7 ENVIRONMENTAL REQUIREMENTS

The environmental requirements for the SEHI are detailed in this section. 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)

3.8 AGENCY APPROVALS

The Safety, Immunity, and Emission approvals for the SEHI are detailed in this section.

3.8.1 Safety

This unit meets the safety requirements of UL 1950, CSA C22.2 No. 950, IEC 950, and EN 60950.

3.8.2 Immunity

This unit meets the immunity requirements of EN 50082-1 including IEC 801-2 (ESD), IEC 801-3 (Radiated Susceptibility), and IEC 801-4 (EFT/B).

3.8.3 Emission

This unit meets the emission requirements of FCC Part 15 Class A, EN 55022 Class A, and VCCI Class I.

3.9 PHYSICAL SPECIFICATIONS

This section details the physical speciﬁcations for the SEHI. Dimensions (H x W x D): (7.2 cm x 43.6 cm x 34.6 cm)

(2.8 in x 17.0 in x 13.5 in)

Weight (Unit): 3 kg (6.5 lb)

3-8 SEHI User’s Guide

Page 24

CHAPTER 4

INSTALLATION

This chapter outlines the procedure for attaching the SEHI to the network as a stackable or standalone device. Ensure that the network meets the guidelines and requirements outlined in Chapter 3, Installation Requirements and Specifications, before installing the SEHI.

Failure to follow installation instructions may result in an electrical shock hazard.

4.1 UNPACKING THE SEHI

Unpack the SEHI as follows:

1. Remove the shipping material covering the SEHI in the shipping box.

2. Carefully remove the SEHI from the shipping box and set it aside to

prevent damage.

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

Cabletron Systems Technical Support immediately.

4. Read the SEHI Release Notes included in the shipping box.

NOTE

SEHI User’s Guide 4-1

Cabletron Systems includes a 3-1/2" disk with the SEHI that contains a backup copy of the SEHI Flash Firmware Image File. Download the ﬁle to the SEHI if the existing image becomes corrupted.

Page 25

Chapter 4: Installation

4.2 PRE-INSTALLATION TEST

The SEHI is equipped with an NVRAM reset switch (Figure 4-1) located behind the grillwork on the side of the hub. Ensure that this switch is in the DOWN position by looking in through the grillwork on the right side of the hub. If the switch is UP, move it into the DOWN position with a non-metallic tool. Do not remove the chassis cover to perform this operation. Leaving the switch in the UP position results in user-installed parameters such as IP address and Community Names being cleared from NVRAM whenever the SEHI loses power and/or is reset. See Chapter 6, Section 6.4, for detailed instructions on setting the NVRAM switch.

Rear of Chassis

NVRAM Switch located behind grating

09162_05

Figure 4-1 NVRAM Switch Location

4.3 INSTALLING THE SEHI

The SEHI may be installed on a tabletop or shelf, or in a 19-inch rack, and conﬁgured as a standalone or stacked hub.

Refer to Section 4.3.1 for information concerning a tabletop or shelf installation. Section 4.3.2 describes the rackmount installation.

4-2 SEHI User’s Guide

Page 26

Installing the SEHI

4.3.1 Tabletop or Shelf Installation

This section provides guidelines for installation on a tabletop or shelf. Tabletop and shelf installations must be within reach of the network cabling and meet the requirements listed below:

• A single phase grounded power receptacle that meets the power supply

requirements listed in Chapter 3 under Power Supply Requirements must be located within seven feet of the location.

• In a shelf installation, the shelf must be able to support 30 pounds of

static weight for each device in the stack.

• Maintain a temperature of between 5°C (41°F) and 40°C (104°F) at

the site with ﬂuctuations of less than 10°C (18°F) per hour.

For a tabletop or shelf installation, locate the SEHI within seven feet of its power source and with an unrestricted free surface area as shown in Figure 4-2.

In order to allow for proper cooling, there must be a two-inch clearance on either side and the back of the unit.

CAUTION

21 IN.

SECURE

E 1

1112

789

EPIM 1

123

6 IN.

18 IN.

HubSTACK SEHI-22FL

RESET

10BASE-FL HUB

PWR CPU CLN

COM

WITH

LANVIEW

RCV

LNK

12 11 10 9 8 7 6 5 4 3 2 1

7 FT

0165203

Figure 4-2 Tabletop or Shelf Installation

If the installation requires that the SEHI is to be stacked, proceed to Section 4.3.3. Otherwise, continue by connecting power as described in Section 4.4.

SEHI User’s Guide 4-3

Page 27

Chapter 4: Installation

4.3.2 Rackmount Installation

To install the SEHI in a 19-inch rack, Cabletron Systems offers an accessory kit that includes rackmount brackets, mounting screws, and a strain-relief bracket for cable management. The accessory kit is not included with the SEHI, but can be purchased separately from Cabletron Systems using the part number SEHI-ACCY-KIT.

Rack mounting the SEHI involves the following:

• Attaching the strain-relief bracket

• Rack mounting the SEHI

• Stacking the SEHI when applicable

Attaching the Strain-Relief Bracket

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

1. Locate the strain-relief bracket and four 8-32 x 3/8 inch screws from the SEHI-ACCY-KIT package.

Do NOT attempt to attach the strain-relief with screws other than the 8-32 x 3/8-inch screws included with the SEHI accessory kit. Use of longer screws may damage the unit or cause electrical shock.

2. Attach the strain-relief bracket to the bottom of the SEHI (Figure 4-3).

Screws (4)

Strain-Relief Bracket

EPIM 1

1112

SECURE

WITH

LANVIEW

12 11 10 9 8 7 6 5 4 3 2 1

Figure 4-3 Attaching the Strain-Relief Bracket

4-4 SEHI User’s Guide

COM

RESET

CLN

LNK RCV

CPU PWR

SEHI-22FL HubSTACK

10BASE-FL HUB

0165204

Page 28

Installing the SEHI

Rack Mounting the SEHI

Refer to Figure 4-4 and proceed as follows to install the SEHI into a 19-inch rack.

1. Remove four cover screws (two from each side) located along the

front edges of each side of the SEHI.

Do not remove the cover from the SEHI. Do not remove any other screws from the unit.

2. Using the four 6-32 x 3/8-inch replacement flathead cover screws

provided in the SEHI-ACCY-KIT, attach the rack mounting brackets to each side of the SEHI.

Rack Mounting

Brackets (2)

HubSTACK SEHI-22FL

RESET

10BASE-FL HUB

PWR CPU CLN

COM

RCV LNK

12 11 10 9 8 7 6 5 4 3 2 1

WITH

LANVIEW

SECURE

E 1

Screws (4)

1112

EPIM 1

0165205

Figure 4-4 Installing the Rack Mounting Brackets

3. Ensure that the rack used will support the unit and that the rack will

remain stable with the unit installed in it. Support the SEH securely from underneath and align the brackets of the SEH chassis with the screw holes in the equipment rack as shown in Figure 4-5. Fasten the SEH to the equipment rack securely.

SEHI User’s Guide 4-5

Page 29

Chapter 4: Installation

The cooling fans at the rear panel of the SEHI must have adequate clearance (two inches on either side and in the rear)

CAUTION

for unrestricted air ﬂow. The temperature for the selected location must be maintained between 5°C and 40°C, and ﬂuctuate less than 10°C per hour.

19-Inch Rack

HubSTACK SEHI-22FL

RESET

10BASE-FL HUB

PWR CPU CLN

COM

RCV LNK

12 11 10 9 8 7 6 5 4 3 2 1

WITH

LANVIEW

SECURE

1112

E 1

EPIM 1

Screws (4)

0165206

Figure 4-5 Installing the SEHI in the Rack

If the installation requires stacking the SEHI, proceed to Section 4.3.3. Otherwise, continue by connecting power as described in Section 4.4.

4.3.3 Stacking the SEHI

The rear panel of the SEHI has an Interconnect Bus Out Port (male connector). Daisy chain units together using Cabletron Systems HubSTACK Interconnect cables. Table 4-1 describes each cable.

Table 4-1 HubSTACK Interconnect Cables

Part Number

9380110 12" HubSTACK Interconnect Cable SEH to SEH 9380111 18" HubSTACK Interconnect Cable SEHI to SEH

Description Application

4-6 SEHI User’s Guide

Page 30

Installing the SEHI

To stack the SEHI together with an SEH non-intelligent hub, proceed as follows:

1. Attach the SEHI HubSTACK Interconnect cable to the “OUT” port on

the rear panel of the SEHI as shown in Figure 4-6.

2. Attach the other end of the SEHI HubSTACK Interconnect cable to

the “IN” port on the rear panel of the SEH.

To stack SEH non-intelligent hubs together, proceed as follows:

1. Attach the SEH HubSTACK Interconnect cable to the “OUT” port on

the rear panel of the SEH as shown in Figure 4-6.

2. Attach the other end of the SEH HubSTACK Interconnect cable to the

“IN” port on the rear panel of the SEH next in the stack.

SEH HubSTACK Interconnect Cables

SEH-22FL 100BASE-FL HUB WITH LANVIEW®

SEH INTERCONNECT

OUT

SEH-22FL 100BASE-FL HUB WITH LANVIEW®

SEH INTERCONNECT

SEHI HubSTACK Interconnect Cable

OUT

SEH-22FL 100BASE-FL HUB WITH LANVIEW®

SEH INTERCONNECT

OUT

SEH-22FL 100BASE-FL HUB WITH LANVIEW®

SEH INTERCONNECT

OUT

SEHI-22FL 100BASE-FL HUB WITH LANVIEW®

SEH INTERCONNECT

OUT

165210

Figure 4-6 Stacking the SEHI

SEHI User’s Guide 4-7

Page 31

Chapter 4: Installation

If one end of a HubSTACK Interconnect cable is disconnected without disconnecting the other end attached to the hub, disconnect the cable from the OUT port as shown in Figure 4-7 to ensure that the HubSTACK Interconnect cable is terminated properly.

Disconnect SEH and SEHI

Interconnect Cables at the "OUT" Port

SEH-22FL

100BASE-FL HUB WITH LANVIEW®

SEH INTERCONNECT

SEH-22FL

SEHI-22FL

OUT

100BASE-FL HUB WITH LANVIEW®

SEH INTERCONNECT

OUT

100BASE-FL HUB WITH LANVIEW®

SEH INTERCONNECT

OUT

165211

Figure 4-7 Disconnecting the HubSTACK Interconnect Cable

Proceed to Section 4.4 to connect power.

4.4 CONNECTING THE SEHI TO THE POWER SOURCE

NOTE

Connect the SEHI to the power source as follows:

1. Plug the power cord into the back panel of the SEHI.

2. Plug the other end of the power cord into a grounded wall outlet.

3. Verify that the PWR LED is on, indicating that the SEHI is receiving

4-8 SEHI User’s Guide

The SEHI uses a universal power supply that operates between 100–125 Vac or 200–250 Vac, 50/60 Hz.

power. After the SEHI runs a self test, the CPU LED blinks green indicating normal operation. If the LED remains red, the processor is faulty, contact Cabletron Systems Technical Support.

Page 32

Adding/Replacing EPIMs

4.5 ADDING/REPLACING EPIMS

This section contains procedures on how to add or replace an Ethernet Port Interface Module (EPIM) to upgrade or change the capabilities of your SEHI. After installing a new EPIM, refer to the appropriate EPIM section in Appendix A to verify proper operation.

Observe all static precautions while handling EPIMs.

CAUTION

Perform the following steps to install an EPIM:

NOTE

prevent damage to the connector.

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

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

rear of the EPIM align correctly and firmly with the connector inside the SEHI. See Figure 4-8.

3. Tighten the mounting screw.

When removing an EPIM, pull the module out straight to

165202

EPIM-1

PWR

EPIM-A

Figure 4-8 Installing an EPIM

SEHI User’s Guide 4-9

Page 33

CHAPTER 5

CONNECTING TO THE NETWORK

This chapter outlines the procedure for connecting the SEHI to a network. Ensure that the network meets the guidelines and requirements outlined in Chapter 3, Installation Requirements and Specifications, before installing the SEHI.

5.1 CONNECTING THE SEHI TO THE NETWORK

The procedure for connecting network segments to the SEHI varies depending on the media and ports being connected. Refer to the following list and perform the procedure described in the subsections that apply to connecting the SEHI to a network:

• Connecting Network Ports Section 5.1.1

• Connecting a UTP segment to an EPIM-T Section 5.1.2

• Connecting a ﬁber segment to an EPIM-F1/F2/F3 Section 5.1.3

• Connecting a Thin Coaxial Segment to an EPIM-C Section 5.1.4

• Connecting an AUI cable to an EPIM-A Section 5.1.5

• Connecting an AUI Cable to an EPIM-X Section 5.1.6

5.1.1 Connecting Network Ports

The SEHI-22FL has ST style network ports. Read the following guidelines before connecting a ﬁber optic link segment to the SEHI:

• Insert the connector into the port with the alignment key on the

connector inserted into the alignment slot on the port. The connector is then turned clockwise to lock it down.

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

cabling: the Transmit (TX) and the Receive (RX). Connect the TX strand from the applicable port on the module to the receive port of a ﬁber optic Ethernet device at the other end of the segment. The RX strand of the applicable port on the module connects to the transmit port of the ﬁber optic Ethernet device.

SEHI User’s Guide 5-1

Page 34

Chapter 5: Connecting to the Network

• Label the ﬁber optic cable to indicate which ﬁber is receive and which is transmit. Cabletron Systems ﬁber optic cable is labeled so that one ﬁber is labeled 1, and the other ﬁber is labeled 2 at both ends of the cable. If the cable was not purchased from Cabletron Systems, label the cable as described above.

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 the ends causes problems in data transmissions. If the ends become contaminated, clean them with alcohol using a soft, clean, lint-free cloth.

Use the following steps to connect a ﬁber optic link segment to the SEHI:

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 RX port, on the SEHI. See Figure 5-1.

09032_09

Figure 5-1 SEHI-22FL Network Ports

5-2 SEHI User’s Guide

Page 35

Connecting the SEHI to the Network

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

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 for the appropriate port is on. If the LED is

off, perform the following steps until it is on: a. Check that the power is turned on for the device at the other end of

the link.

b. Verify proper crossover of fiber strands between the applicable

port on the SEHI 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 Chapter 3.

If a link is not established, contact Cabletron Systems Technical Support.

SEHI User’s Guide 5-3

Page 36

Chapter 5: Connecting to the Network

5.1.2 Connecting a UTP Segment to an EPIM-T

Before connecting a segment to the EPIM-T, check each end of the segment to determine if the wires cross over for proper connection. If the wires do not cross over, use the switch on the EPIM-T to internally cross over the RJ45 port. Figure 5-2 shows the pin assignment of the port according to the switch position.

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 5-2 EPIM-T Crossover Switch

5. NC

6. RX-

7. NC

8. NC

1490_14

To connect an EPIM-T to a twisted pair segment:

1. Connect the segment to the module by inserting the RJ45 connector on the segment into the RJ45 port on the module. See Figure 5-2.

2. Check that the EPIM LNK LED is on. If the LED is off, perform each of the following steps until it is on:

a. Check that the device at the end of the segment is powered up. b. Verify that the RJ45 connector on the twisted pair segment has the

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

specifications outlined in Chapter 3, Section 3.1.3. e. Check that the crossover switch is in the correct position.

5-4 SEHI User’s Guide

Page 37

Connecting the SEHI to the Network

If a link is not established, contact Cabletron Systems Technical Support.

5.1.3 Connecting a Fiber Segment to an EPIM-F1/F2/F3

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

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

to an EPIM-F1 with SMA ports, ensure that the half alignment sleeves

(shown in Figure 5-3) are in place on each connector. A full alignment

sleeve will damage the recei ve port. SMA 905 connectors do not need

alignment sleeves.

• Connect a segment with ST connectors to an EPIM-F2 or EPIM-F3 by

inserting the connector into the port with the alignment key on the

connector inserted into the alignment slot on the port. Turn the

connector clockwise 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 TX strand from

the applicable port on the module connects to the receive port of a ﬁber

optic Ethernet device at the other end of the segment. The RX strand

of the applicable port on the module connects to the transmit port of

the ﬁber optic Ethernet device.

• Label the ﬁber optic cable to indicate which ﬁber is receive and which

is transmit. Fiber optic cable purchased from Cabletron Systems is

labeled so that one ﬁber is labeled 1, and the other ﬁber is labeled 2 at

both ends of the cable. For cable not purchased from Cabletron

Systems, label the cable as described above.

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

SEHI User’s Guide 5-5

Contamination of the ends causes problems in data transmissions. If the ends become contaminated, clean them with alcohol using a soft, clean, lint free cloth.

Page 38

Chapter 5: Connecting to the Network

Connect a ﬁber optic link segment to an EPIM-F1, EPIM-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 RX port on the module. See Figure 5-3.

3. Attach the fiber labeled 2 to the applicable TX port 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 EPIM LNK LED is on. If the LED is off, perform the following steps until it is on:

a. Check that the power is on for the device at the end of the link. b. Verify that the fiber strands are properly crossed over 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 fiber optic network requirements.

If a link is not established, contact Cabletron Systems Technical Support.

5-6 SEHI User’s Guide

Page 39

F1/F2

SMA 905 Connectors

Connecting the SEHI to the Network

ST Connectors

F1/F2

SMA 906 Connectors w/

Half Alignment Sleeves

ST Connectors

1490_15

Figure 5-3 The EPIM-F1, EPIM-F2, and EPIM-F3

SEHI User’s Guide 5-7

Page 40

Chapter 5: Connecting to the Network

5.1.4 Connecting a Thin Coaxial Segment to an EPIM-C

To connect a thin coaxial segment to an EPIM-C:

1. Set the Internal Termination Switch, located to the right of the port and labeled TERM to one of the following:

• The On position (

•) if the thin coaxial segment connected directly

to the port is internally terminated at the port

• The Off position (o) if the thin coaxial segment is not internally

terminated at the port or externally terminated

2. If the Internal Termination switch is in the On position, connect the thin coaxial segment directly to the BNC port as shown in Figure 5-4.

3. If the Internal Termination switch is in the Off position, proceed with the following steps:

a. Attach a BNC T-connector to the BNC port on the module. b. Attach the thin coaxial segment to one of the female connectors on

the T-connector.

NOTE

Terminate each segment attached to the T-connector. If a segment is not attached to one of the female connections on the T-connector, place a terminator on that connection.

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

female connector on the T-connector.

For safety, ground only one end of a thin coaxial segment. Do NOT connect EPIM BNC ports to earth ground. Connecting a thin coaxial segment to earth ground at more than one point could produce dangerous ground currents.

5-8 SEHI User’s Guide

Page 41

Connecting the SEHI to the Network

When internal termination switch is set to Off ( ) follow these procedures:

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

thin coaxial segment to one female connector of T-connector.

Connect a terminated thin coaxial segment to other female connector of T-connector.

Figure 5-4 The EPIM-C

Attach thin coaxial segment directly to BNC connector when internal termination switch is set to On ( ).

5.1.5 Connecting an AUI Cable to an EPIM-A

1490_16

Ensure that the Signal Quality Error (SQE or “heartbeat”) test function is disabled on the external transceiver connected to

CAUTION

the SEHI. The SEHI will not operate and the network will be unusable if the transceiver has the SQE test function enabled. Refer to the applicable transceiver manual.

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

1. Attach an external transceiver to the network segment to be connected

to the AUI port. Refer to the applicable transceiver manual.

2. Attach an AUI cable no longer than 50 meters in length to the

transceiver connected to the network in step 1.

3. Connect the AUI cable to the EPIM-A. (See Figure 5-5.)

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

SEHI User’s Guide 5-9

Page 42

Chapter 5: Connecting to the Network

EPIM-1

1651_01

EPIM-A

PWR

165213

Figure 5-5 The EPIM-A

5. Check that the PWR LED on the EPIM-A is on. If the LED is not on, contact Cabletron Systems Technical Support.

6. If the PWR LED is on with the AUI cable disconnected, continue with the following checks:

a. Check the AUI connections for proper pinouts. The pinouts for the

transceiver connection are listed in Chapter 3. b. Check the cable for continuity. c. Reconnect the AUI cable to the SEHI and the device.

If the LED is still not on after reconnecting the segment, contact Cabletron Systems Technical Support.

5-10 SEHI User’s Guide

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Connecting the SEHI to the Network

5.1.6 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

Perform the following steps to connect an EPIM-X to a device not requiring SQE:

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

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

check the position of the SQE switch.

NOTE

If the SQE light remains on, even though the SQE switch is in the OFF position, contact Cabletron Systems Technical Support.

2. Attach one end of an AUI cable of up to 50 meters in length to the port

located on the EPIM-X (Figure 5-6) and connect the other end to the

intended node.

ON Position (Toward Back of EPIM)

OFF

OFF Position (Toward Front of EPIM)

1490_18

Figure 5-6 The EPIM-X

SEHI User’s Guide 5-11

Page 44

Chapter 5: Connecting to the Network

5.2 FINISHING THE INSTALLATION

The SEHI is now ready for operation. Before placing the network into service, test the installation thoroughly, making sure that all stations can be addressed and that the SEHI and all stations are indicating normal operation. Ensure that the networking software is conﬁgured properly to match the installed network. If there are any errors or abnormal operation, proceed to Chapter 6, Troubleshooting.

5-12 SEHI User’s Guide

Page 45

CHAPTER 6

TROUBLESHOOTING

This chapter contains instructions for using LANVIEW LEDs to troubleshoot physical layer network problems. It also describes how to reset the SEHI and how to reset the NVRAM switch.

6.1 INSTALLATION CHECKOUT

After connecting the SEHI to the network, verify that the packets pass between all Ethernet devices connected to the SEHI and any other de vices connected to the network. If there is a problem with any of the attached devices, check the link as follows:

1. Check that the LNK LED, if applicable, for the port is on. If the LED

is off, proceed with the following steps:

a. Check that the 10BASE-FL device at the other end of the ﬁber

optic segment is powered up and that the TX and RX ﬁbers are properly connected.

b. For twisted pair EPIMs such as the EPIM-T, verify that the

connector on the twisted pair segment has the proper pinouts. Refer to Chapter 3 for the pin assignments for twisted pair connectors.

For the SEHI 10BASE-FL ports and the EPIM-F1, EPIM-F2, or EPIM-F3 check that the TX and RX fibers are properly connected.

c. Check the cable for continuity. Several tools are available for this

test, depending on the media used.

d. Check that the twisted pair segments meet cable specifications for

dB loss as described in Chapter 3.

SEHI User’s Guide 6-1

Page 46

Chapter 6: Troubleshooting

2. If the remote station is ready and the LNK LED is on, but no data

passes through the port, one of the following two conditions may exist:

• Network management disabled the port.

• The port is segmented either because the collision detector was on

for more than 110 µs or the SEHI detected more than 32

consecutive collisions on the attached segment. The affected port

remains segmented until a good packet is transmitted/received

without collisions.

If the LNK LED is still off, contact Cabletron Systems Technical Support.

6.2 USING LANVIEW

The SEHI incorporates the Cabletron Systems LANVIEW status monitoring and diagnostics system. LANVIEW LEDs help diagnose problems such as power failure or cable fault. The SEHI uses the following LANVIEW LEDs:

• PWR, for power status

• CPU, for board status

• RCV (Receive), LNK (Link), and CLN (Collision) for Ethernet

status.

Figure 6-1 provides a quick reference chart of LED locations and deﬁnitions. This chapter also includes a detailed description of each LED.

6-2 SEHI User’s Guide

Page 47

Using LANVIEW

HubSTACK 10BASE-T HUB WITH LANVIEW SEHI-22FL

PWR

RESET

COM

LED NAME

PWR (Power)

CPU (Central Processing Unit)

CLN (Collision)

RCV (Receive)

LNK (Link)

Figure 6-1 LANVIEW LEDs

CPU CLN

LED COLOR

Off Green (Solid)

Off Green (Flashing) Green (Blinking) Red (Solid)

Red

Yellow (Flashing) Off

Green Off

SECURE

RCV LNK

12 11 10 9 8 7 6 5 4 3 2 1

DEFINITION

No power Power

CPU in BOOT process CPU initializing CPU functioning CPU not functioning

Collision

SEHI is receiving data No activity

Link established No link

E 1

165214

NOTE

Blinking indicates a steady LED pulse.

PWR

When this green LED is on, it indicates that the SEHI is receiving power. If this LED is off, it indicates a loss of input power. Check the input power source (circuit breaker, fuse, etc.). If the proper source power is present, the problem could be with the SEHI.

Flashing indicates an irregular LED pulse.

CPU

This LED alternates from red to green during power up. After the boot is complete, the LED blinks green. A blinking green LED indicates normal operation. A red LED indicates a faulty processor.

SEHI User’s Guide 6-3

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Chapter 6: Troubleshooting

CLN

This red LED indicates that a collision has occurred on one of the ports.

RCV

When a yellow RCV LED ﬂashes, it indicates that the SEHI is receiving data packets from the associated port segment. Each SEHI port has a corresponding RCV LED. The network RCV port LEDs are labeled 1-12 and the EPIM-1 RCV port LED is labeled E-1.

LNK

When a green LNK LED is on, it indicates an established link between the associated port and the device at the other end of the segment. The LNK LED remains on as long as a link is maintained. Each SEHI Network Port (ports 1–12) has a corresponding LNK LED.

6.3 USING THE RESET BUTTON

The SEHI incorporates a recessed RESET button. See Figure 6-1. The RESET button initializes the SEHI processor. This button does NOT initialize Non-Volatile Random Access Memory (NVRAM), the nonvolatile random access memory where the SEHI stores network management parameters.

To use the RESET button, use a pen or pencil to press the button. When this is done, the SEHI initializes itself.

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Setting the NVRAM Switch

6.4 SETTING THE NVRAM SWITCH

To prevent the possibility of electrical shock, do not remove the chassis cover to access the NVRAM switch, and use only a

non-metallic tool when moving the NVRAM switch.

The SEHI uses NVRAM (Non-Volatile Random Access Memory) to store user-entered parameters such as IP address and Community Names. To reset these parameters to the factory defaults, refer to Figure 6-2 and perform the following steps:

1. With the power ON and using a non-metallic tool, move the NVRAM

switch to the UP position.

2. Press the RESET switch located on the front panel.

3. Wait until the unit boots (approximately 12 seconds).

4. Return the NVRAM switch to the DOWN position.

Failure to return the NVRAM switch to the DOWN position results in loss of user-entered parameters upon power

CAUTION

shutdown and restart. The SEHI clears NVRAM if the unit is restarted with the switch in the UP position.

Rear of Chassis

NVRAM Switch located behind grating

165215

Figure 6-2 NVRAM Switch Location

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CHAPTER 7

LOCAL MANAGEMENT

This chapter explains how to set up a management terminal to access the SEHI Local Management. It also explains how to use the Local Management screens and commands.

Use Local Management to accomplish the following tasks:

• Assign an IP address and subnet mask.

• Select a default gateway.

• Control access to the SEHI through the community names established

in the Community Name Table.

• Designate which Network Management Workstations receive trap

messages from the device.

• Navigate through the Management Information Base (MIB) and

manage the objects within it from a remote location. Given the

appropriate security level, the MIB is accessible from the SEHI

through SNMP Tools. Local Management also allows the user to manage each non-intelligent

stackable hub attached to the SEHI, and provides a Statistics screen to view error, collision, and trafﬁc statistics for the entire stack, individual module, or individual port.

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Chapter 7: Local Management

7.1 LOCAL MANAGEMENT KEYBOARD CONVENTIONS

All key names appear in this manual as capital letters. For example, the enter (return) key appears as ENTER and the space bar appears as SPACE bar. Table 7-1 explains the keyboard conventions used in this manual as well as the key functions.

Table 7-1 Keyboard Conventions

Key Function

RETURN Key and ENTER Key These are selection keys that perform

the same Local Management function. For example, “Press ENTER” means press either ENTER or RETURN, unless this manual speciﬁcally instructs you otherwise.

SPACE bar and BACKSPACE Key These keys cycle through selections

in some Local Management ﬁelds. Use the SPACE bar to cycle forward through selections and use BACKSPACE to cycle backward through selections.

Arrow Keys These are navigation keys. Use the

UP-ARROW, DOWN-ARROW, LEFT-ARROW, and RIGHT-ARROW keys to move the screen cursor. For example, “Use the arrow keys” means to press whichever arrow key moves the cursor to the desired ﬁeld on the Local Management screen.

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Management Terminal Setup

7.2 MANAGEMENT TERMINAL SETUP

Use one of the following systems to access Local Management:

• A Digital Equipment Corporation VT series terminal

• A VT type terminal running emulation programs for the Digital Equipment Corporation VT series

• An IBM or compatible PC running a VT series emulation software package

Use a console cable to attach the management terminal to the SEHI. The console cable is not included with the SEHI, but can be purchased separately from Cabletron Systems as part number SEHI-ACCY-KIT.

The SEHI-ACCY-KIT package provides an RJ45 Cable Kit that includes the following:

• UTP console cable with RJ45 connectors on each end

• Adapters for DB9 or DB25 connections

• Instruction Sheet

The following sections explain ho w to attach the console cable and set up the management terminal. Refer to the RJ45 Cable Kit Instruction Sheet for adapter pinouts and additional information.

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Chapter 7: Local Management

Console Cable Conﬁguration

Use the RJ45 Cable Kit provided with the SEHI-ACCY-KIT package to attach the management terminal to the SEHI COM port as shown in Figure 7-1.

Connect the console cable to the SEHI as follows:

1. Attach the male RJ45 connector to the COM port of the SEHI.

2. Attach the female end (25-pin or 9-pin, as applicable) to the COM port on the terminal.

Console Cable

COM Port

Figure 7-1 Management Terminal Connection

HubSTACK 10BASE-T HUB WITH LANVIEW® SEHI-24

COM

COM RJ45 Port

EPIM-2

EPIM-1

Management Terminal

09162_17

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Management Terminal Setup

Management Terminal Setup Parameters

Table 7-2 lists the setup parameters for the local management terminal. If the terminal is a Digital Equipment Corporation VT320 terminal, press F3 to access the Setup Directory. If the Local Management terminal uses terminal emulation of the VT320, refer to the equipment user manual for setup procedures.

Table 7-2 Terminal Setup Parameters

Menu Function Selection

Columns 80 Columns

Display Setup:

General Setup:

Communications Setup:

Keyboard Setup:

Controls Interpret Controls Auto Wrap No Auto Wrap Test Cursor Cursor Mode 7 Bit Control Cursor Keys Normal Cursor Keys Transmit Transmit = 9600 Receive Receive = Transmit XOFF Any Option Bits, Parity 8 Bits, No Parity Stop Bit 1 Stop Bit Local Echo No Local Echo

Port Transmit Any Option

Auto Answerback No Auto Answerback Auto Repeat Any Option Keyclick Any Option Margin Bell Margin Bell Warning Bell Warning Bell Auto Answerback No Auto Answerback

DEC-423,

Data Leads Only

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Chapter 7: Local Management

7.3 ACCESSING LOCAL MANAGEMENT

After conﬁguring the local management terminal and properly attaching the cables to the SEHI, access the Local Management interface.

1. Power up the terminal. The password screen (Figure 7-2) appears.

SEHI LOCAL MANAGEMENT

Cabletron SEHI Revision X.XX.XX

Cabletron Systems Incorporated 35 Industrial Way, P.O. Box 5005

Rochester, NH 03867-0505 U.S.A.

(603) 332-9400

SEHI F/W Version: X.XX.XX Boot Prom Version: X.XX.XX SEHI Board Version: X.X

EnterUser Password:

1490_21

Figure 7-2 Password Screen

2. Enter the Password. The factory default password for Super-User access is “public” or press ENTER.

NOTE

The password is one of the community names speciﬁed in the Community Name Table. Access to certain Local Management capabilities depends on the degree of access accorded that community name. Refer to Section 7.5 for more details about community names.

3. Press ENTER.

• If the password entry is inv alid, the cursor returns to the beginning

of the password entry ﬁeld.

• If the password is valid, the associated access privilege appears

brieﬂy, then the SEHI Local Management Feature Selection screen shown in Figure 7-3 appears.

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The Feature Selection Screen

NOTE

Management session ends and the screen defaults to the Password screen.

If the terminal keyboard is not used for 15 minutes, the Local

SEHI LOCAL MANAGEMENT

Cabletron Systems Incorporated

P.O. Box 5005 Rochester, NH 03867-0505 U.S.A.

(603) 332-9400

FEATURE SELECTION

F6 COMMUNITY NAME TABLE

F7 IP ADDRESS ASSIGNMENT

F8 COMPONENT TRAP TABLE

F9 SNMP TOOL SUPPORT

DEVICE STATISTICS

EXIT LIM SERVICE

1490_22

Figure 7-3 Feature Selection Screen

7.4 THE FEATURE SELECTION SCREEN

The Feature Selection screen is the main menu screen for SEHI Local Management. There are ﬁve screen options in the Feature Selection screen: Community Name Table, IP Address Assignment, Component Trap Table, SNMP Tool Support, and Device Statistics. Use the arrow keys to highlight an option, then press ENTER (or press the corresponding Function Key). The selected screen appears.

To exit your Local Management session, use the arrow keys to highlight the EXIT LIM SERVICE command, then press ENTER.

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Chapter 7: Local Management

7.5 THE COMMUNITY NAME TABLE SCREEN

To access the Community Name Table screen from the Feature Selection screen, use the arrow keys to highlight the Community Name Table option, then press ENTER or F6. The Community Name Table screen shown in Figure 7-4 appears.

SEHI LOCAL MANAGEMENT

Cabletron SEHI Revision X.XX.XX

COMMUNITY NAME TABLE

COMMUNITY NAME ACCESS

PUBLIC

SAVE IP TABLE TRAP TABLE SNMP TOOLS RETURN

F6 F7 F8 F9

BASIC-READ

READ-ONLY

READ-WRITE

SUPER-USER

1490_23

Figure 7-4 Community Name Table Screen

Community names are set through the Community Name Table option. Community names are passwords to Local Management and are agents of security control to the SEHI. SEHI access is controlled by establishing up to four different levels of security authorization: Basic-Read, Read-Only, Read-Write, and Super-User.

With Super-User access, the user changes the existing passwords by changing the community names. Only the community name assigned Super-User access has full management privileges.

The following sections explain each ﬁeld on the Community Name Table screen and provides instructions on how to change them.

COMMUNITY NAME

Displays the user-deﬁned name through which a user can access Local Management for the SEHI. Any community name assigned here acts as a password to Local Management.

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The Community Name Table Screen

ACCESS

Indicates the access status accorded each community name. Possible conditions are as follows:

BASIC-READ This allows Read-Only access to Local

Management, but excludes read privileges to the Component Trap screen.

READ-ONLY This allows Read-Only access to Local

Management, but excludes access to security protected ﬁelds of the upper levels of authorization (Read-Write or Super-User).

READ-WRITE This allows the user to read and write to Local

Management ﬁelds, excluding IP Address, Subnet Mask, and Community Names.

SUPER-USER This access privilege gives the user read and

write access to Local Management. Super-User allows read and write access to all modiﬁable parameters including: Community Names, IP Addresses, Traps, and SNMP Objects.

Editing the Community Name Field

The password used to access Local Management at the Password screen must have Super-User privileges for the edits to take effect. If a password is entered with Basic-Read, Read-Only, or Read-Write privileges, Local Management displays the message “AUTHORIZATION PROHIBITS ACCESS”, and does not include editing capabilities.

To edit the Community Name ﬁeld:

1. Use the arrow keys to highlight the Community Name field adjacent

to the desired access level.

2. Enter the community name (maximum of 32 characters) into the field.

3. Press ENTER.

4. Repeat steps 1–3 for editing any of the other community names.

5. Use the arrow keys to highlight the SAVE command at the bottom of

the screen, then press ENTER or F6. The “SAVED OK” message appears indicating that the edits have been saved to memory.

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Chapter 7: Local Management

NOTE

the changes, a “NOT SAVED?” message is displayed. The edits are lost if the user exits without saving the changes.

6. To exit the screen, press the appropriate Function key or use the arrow keys to highlight the RETURN command.

7. Press ENTER. The Feature Selection screen appears.

7.6 THE CONFIGURATION SCREEN

T o access the Conﬁguration screen from the Feature Selection screen, use the arrow keys to highlight the IP Address Assignment option, then press ENTER or F7. The screen shown in Figure 7-5 appears.

SEHI LOCAL MANAGEMENT

Cabletron SEHI Revision X.XX.XX

CONFIGURATION

I/F IP Address SubNET Mask MAC Address

1 000.000.000.000 000.000.000.000 00-00-1d-05-dc-

The ﬁrst time a user attempts to exit the screen without saving

Serial Port 1 Application: CONSOLE Baud Rate: 9600 --ACTIVE-

Port Enable Override: OVERRIDE DISABLED

Default Gateway: 0.0.0.0

SAVE COMMUNITY NAMES TRAP TABLE SNMP TOOLS RETURN

F6 F7 F8 F9

1490_24

Figure 7-5 Conﬁguration Screen

Assign the IP Address, Subnet Mask, and Default Gateway through this screen. Use the Port Enable Override option to enable all device ports in the stack and override the Port Disable setting in the Statistics screen.

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The Conﬁguration Screen

The following sections explain each ﬁeld on the Conﬁguration screen.

I/F

The number of the interface corresponding to the channels over which packets with that IP Address pass. On the SEHI, this value is “1.”

IP Address

Displays the IP address of the SEHI.

SubNET Mask

Displays the subnet mask for the SEHI. A subnet mask is a 32-bit quantity which “masks out” the network bits of the IP address. Do this by setting the bits in the mask to 1 when the network treats the corresponding bits in the IP address as part of the network or subnetwork address, or to 0 if the corresponding bit identiﬁes the host.

MAC Address

Displays the physical address associated with the interface.

Default Gateway

Displays the default gateway for the SEHI. This ﬁeld is not deﬁned until an appropriate value is entered. The default gateway identiﬁes the default gateway device that forwards packets to other IP subnetworks.

Serial Port Application

Displays the port application setting as CONSOLE.

Baud Rate

Displays the Baud Rate setting of the device attached to the SEHI through the serial port. The setting for the serial port is 9600.

Port Enable Override

This command lets the user override the Disable Port settings in the Device Statistics screen to enable all ports in the stack.

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Chapter 7: Local Management

Setting the IP Address

Use the following steps to set the IP Address:

1. Use the arrow keys to highlight the IP Address field.

2. Enter the IP address into this field. The format for this entry is XXX.XXX.XXX.XXX, with values for XXX being from 0 to 255. The screen beeps if non-numerics or adjacent dots are entered. If the entry does not have three dots, it is rejected.

3. Press ENTER. The IP address appears and the natural subnet mask for the user is generated and also appears.

4. Use the arrow keys to highlight the SAVE option, then press ENTER or F6. The “SAVED OK” message appears indicating that the changes have been saved to memory.

NOTE

Setting the Subnet Mask

NOTE

The ﬁrst time an attempt is made to exit the screen without saving the changes, a “NOT SAVED?” message is displayed. The edits are lost if the user proceeds to exit without saving the changes.

Consult the Network Administrator prior to setting the Subnet Mask.

The subnet mask deﬁnes how the SEHI treats SNMP Trap IP destination addresses in its Trap Table.

• Set the subnet mask when workstations in the Trap Table reside on a different subnet (i.e., across a gateway or router), and these workstations are to receive SNMP traps.

• Use the subnet mask factory default setting of 0.0.0.0 when all trap designated workstations are on the SEHI subnet.

Use the following steps to set the subnet mask:

1. Use the arrow keys to highlight the SubNET Mask field.

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The Conﬁguration Screen

2. Enter the subnet mask into this field. The format for this entry is

XXX.XXX.XXX.XXX with values for XXX being from 0 to 255.

3. Press ENTER.

4. Use the arrow keys to highlight the SAVE option, then press ENTER

or F6. The “SAVED OK” message appears indicating that the changes have been saved to memory.

NOTE

Setting the Default Gateway

The ﬁrst time an attempt is made to exit the screen without saving the changes, a “NOT SAVED?” message is displayed. The edits are lost if the user proceeds to exit without saving the changes.

The Default Gateway ﬁeld allows the user to identify the router through which the SEHI will be forwarding IP packets.

Use the following steps to set the Default Gateway:

1. Use the arrow keys to highlight the Default Gateway field.

2. Enter the gateway default mask in this field. The format for this entry

is XXX.XXX.XXX.XXX with values for XXX being from 0 to 255.

3. Press ENTER. If the entry is accepted as a valid default gateway,

“OK” appears to the right of the field.

4. Use the arrow keys to highlight the SAVE option, then press ENTER

or F6. The “SAVED OK” message appears indicating that the changes have been saved to memory.

Using the Port Enable Override

Use the following steps to override the Disable Port settings and enable all ports in the stack:

1. Use the arrow keys to highlight the Port Enable Override field.

2. Press ENTER to toggle from the default setting of “OVERRIDE

DISABLED” to “OVERRIDE ENABLED.”

3. The adjacent ﬁeld displays “Y/N.” Enter Y to continue enabling all

ports, or N to discontinue the port enable override. The message “PORT ENABLED” appears after Y is entered.

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Chapter 7: Local Management

Exiting the Conﬁguration Screen

Use the following steps to exit the Conﬁguration screen and return to the Feature Selection screen:

1. Press the appropriate Function key. To return to the Feature Selection screen, use the arrow keys to highlight the RETURN command.

2. Press ENTER. The Feature Selection screen appears.

7.7 THE TRAP TABLE SCREEN

Access the Trap Table screen from the Features Selection screen using the arrow keys to highlight the Component Trap Table option, then press ENTER or F8. The screen shown in Figure 7-6 appears.

SEHI LOCAL MANAGEMENT

Cabletron SEHI Revision X.XX.XX

TRAP T ABLE

SNMP Community Name <CR> <CR> <CR> <CR> <CR> <CR> <CR> <CR>

SAVE COMMUNITY NAMES IP TABLE SNMP TOOLS RETURN F6 F7 F8 F9

Traps

N N N N N N N N

IP Address

0.0.0.0

1490_25

Figure 7-6 Trap Table Screen

The Trap Table deﬁnes the management stations that will receive SNMP Traps for alarm/event notiﬁcation. The following sections explain each ﬁeld on the Trap Table screen and instructions on how to change them.

SNMP Community Name

Displays the community name included in the trap message sent to the network management station with the associated IP address.

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The T rap Tab le Screen

Traps

Enables transmission of the traps to the network management station with the associated IP address.

IP Address

Indicates the IP address of the workstation receiving trap alarms from the SEHI.

Conﬁguring the Trap T able

Use the following steps to conﬁgure the Trap table:

1. Use the arrow keys to highlight the SNMP Community Name field,

then enter the community name.

2. Press ENTER.

3. Use the arrow keys to highlight the Traps field and enter Y (or y) to

send alarms from the SEHI to the workstation, or N (or n) to prevent alarms from being sent.

4. Press ENTER.

5. Use the arrow keys to highlight the appropriate IP Address field.

6. Enter the IP address of the workstation to send traps to in this field.

The format for this entry is XXX.XXX.XXX.XXX, with the value of XXX ranging from 0 to 255, and three dots, or else it returns to the beginning of the field.

7. Use the arrow keys to highlight the SAVE option, then press ENTER

or F6. The “SAVED OK” message appears indicating that the changes have been saved to memory.

Exiting the Trap T able Screen

Use the following steps to exit the Trap Table screen and return to the Feature Selection screen:

1. Press the appropriate Function key. To exit to the Feature Selection

screen, use the arrow keys to highlight the RETURN command.

2. Press ENTER. The Feature Selection screen appears.

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Chapter 7: Local Management

7.8 THE SNMP TOOLS SCREEN

This section describes how to use the SNMP Tools screen to access Management Information Bases (MIBs). Access to screen options depends on the access status accorded to the user’s community name. This section describes Super-User management capabilities.

SNMP Tools allows access to valuable MIB information. The user gets information about speciﬁc object identiﬁers (OIDs), edits the values of conﬁgurable OIDs, and requests the OID numerically sequential to the originally requested OID.

Other ways to view OIDs from the SNMP Tools screen include Walking, Stepping, and Cycling. Walk and Cycle let the user review se veral OIDs at a time.

To access the SNMP T ools screen from the Features Selection screen, use the arrow keys to highlight the SNMP Tools Support option, then press ENTER or F9. The SNMP Tools screen shown in Figure 7-7 appears.

SEHI LOCAL MANAGEMENT

Cabletron SEHI Revision X.XX.XX

SNMP TOOLS

SNMP COMMUNITY NAME: public

OID PREPEND: 1.3.6.1

GET SET GETNEXT WALK RECALL-OID STEP CYCLES REPEAT F6 F7 F8 F9

RETURN F10

1490_26

Figure 7-7 SNMP Tools Screen

The following sections describe SNMP Tools screen ﬁelds.

SNMP COMMUNITY NAME

Identiﬁes the community name used as a password to determine access level to the MIB component.

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The SNMP Tools Screen

OID PREPEND

Speciﬁes the number preﬁx common to all Object Identiﬁers (OIDs) found in the MIBs – 1.3.6.1 is the default preﬁx OID. This is a modiﬁable ﬁeld.

GET

Allows the user to retrieve MIB objects using SNMP protocol.

SET

Allows users with Read-Write and Super-User access to change modiﬁable MIB objects, using SNMP protocol.

GETNEXT

Displays the OID following the current OID.

WALK

Allows the user to scroll through a section of the MIB leaf by leaf, from a user-speciﬁed object identiﬁer. Leaves are the sections of the OID separated by periods. When a walk is initialized, the following categories for each walk entry, or step are displayed.

• Speciﬁed OID - gives the number tag for that OID.

• Size - identiﬁes the number of bytes required to store that object.

• Type - speciﬁes the variable type of the object (e.g., int = integer).

• Data - displays what the object identiﬁer represents.

RECALL-OID

Recalls, from memory, the last OID used.

STEP

Displays the MIB walk, step by step, giving the user time to view speciﬁc leaves in detail.

CYCLES

Allows the user to specify the number of GETNEXT requests to cycle through and how much time will elapse between each request.

REPEAT

Repeats the last Get command, allowing the user to monitor changes to a speciﬁc OID.

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Chapter 7: Local Management

Getting Individual OIDs

Use the following steps to “Get” individual OIDs:

1. Highlight GET, using the arrow keys, then press ENTER or F6. “<GET> OID (=|F9)” appears.

2. Use one of the following options to enter the OID:

• Using the keyboard to enter the OID minus the prepend (e.g., if the

prepend is 1.3.6.1, and 4.1.3 is entered, then the OID=1.3.6.1.4.1.3).

• Entering an “

=” and the OID sufﬁx (e.g., if =4.1.3 is entered, then

the OID=4.1.3). This allows the user to digress and not use the prepend.

• Pressing F9 to recall an OID already entered. The user can then

use the keyboard to modify the recalled OID as necessary.

3. Press ENTER. If there is no instance of that OID, the return code will specify “MIB_NO_INSTANCE”, otherwise, information about that OID data type, length, and value appear.

Getting the Next OID

Use the following steps to “Get” the next OID:

1. Highlight GETNEXT with the arrow keys, then press ENTER or F8. “<GETNEXT> OID (=|F9)” appears.

2. Enter the desired OID, or OID extension. (Press F9 to recall the last OID request. The recalled OID may then be modified as necessary.)

3. Press ENTER. If there is no instance of that OID, the return code will specify “MIB_NO_INSTANCE”, otherwise, information about that OID data type, length, and value appear.

Setting an OID

Use the following steps to “Set” the next OID:

1. Highlight SET by using the arrow keys, then press ENTER or F7. “<SET> OID (=|F9)” appears.

2. Enter the OID, minus the OID prepend. If the OID was previously entered, pressing F9 recalls that entry. The arrow keys may be used to modify the recalled OID if necessary.

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The SNMP Tools Screen

3. Press ENTER. If there is no instance of that OID, the return code will

specify “MIB_NO_INSTANCE”, otherwise “DATA TYPE:” appears.

4. Enter the data type for that OID. Possible choices are integer, string,

null, OID, IP address, counter, gauge, timeticks, and opaque.

5. Press ENTER. “DATA” appears.

6. Enter the value to correspond to the OID. If accepted, “<SET>

OPERATION CODE: XXXX <OK>” appears, otherwise an error message appears.

Viewing Multiple OIDs

View several OIDs at one time to scan a MIB for speciﬁc information. “WALK” scrolls through OIDs numerically sequential to the initial OID request. “STEP” scrolls the MIB Walk, one OID at a time. Cycling allows the user to specify how many GETNEXT commands to cycle through.

Walking Through OIDs

Use the following steps to “Walk” through OIDs:

1. Highlight WALK, using the arrow keys, then press ENTER.

“<INITIAL> OID (=|F9)” appears.

2. Enter the OID (minus the prepend) and press ENTER. The screen

begins walking through the sublayers of the MIB available from the specified OID. Each OID listed displays the specified OID, its size, its type, and the data it contains.

3. Press the SPACE bar to stop the walk, or wait for “***MIB WALK

COMPLETED***” to appear on the screen.

Stepping Through OIDs

Use the following steps to “Step” through OIDs (the user can step through only after a GETNEXT):

1. Highlight STEP, using the arrow keys, then press ENTER. “Specify

OID” appears.

2. Enter the OID (only the suffix is necessary) and press ENTER. The

Tools screen begins to scroll one OID at a time, through all of the sublayers of the MIB available for that OID.

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Chapter 7: Local Management

Cycling Through OIDs

Use the following steps to “Cycle” through OIDs:

1. Use the arrow keys to Highlight CYCLES, then press ENTER.

2. Enter the number of cycles desired to occur after “ENTER CYCLE COUNT:”, then press ENTER.

3. Enter how many seconds delay desired between get next requests after “ENTER CYCLE DELAY (secs):”, then press ENTER.

Exiting the SNMP Tools Screen

Use the following steps to exit the SNMP Tools screen:

1. Use the arrow keys to highlight the RETURN command.

2. Press ENTER. The Feature Selection screen appears.

7.9 THE DEVICE STATISTICS SCREEN

This section describes the features of the Device Statistics screen. The user can view error , collision, and traf ﬁc statistics for the stack, a selected module, or a selected port. The user can also enable and disable ports.

To access the Statistics screen from the Features Selection screen, use the arrow keys to highlight the Device Statistics option, then press ENTER. The Device Statistics screen shown in Figure 7-8 appears.

SEHI LOCAL MANAGEMENT

Cabletron SEHI Revision X.XX.XX

DEVICE STATISTICS

ST ACK T OTAL

BYTES RECEIVED: FRAMES RECEIVED:

ERRORS RECEIVED: COLLISIONS: OOW COLLISIONS: CRC ERRORS: ALIGNMENT ERRORS: RUNT PACKETS: GIANT PACKETS: PORT ADMIN. STATUS: PORT SEG. STATUS:

ENABLE PORT DISABLE PORT UPDATE -FREQ 3 Sec MODULE 1 PORT 1 RETURN

3792125 16547

0 0 0 0 0 0 0 0

MODULE: 1 67960

255

0 0 0 0 0 0 0 0

Figure 7-8 Device Statistics Screen

7-20 SEHI User’s Guide

PORT: 1

67960 255

0 0 0 0 0 0 0 0 ENABLE UNSEGMENTED

1490_27

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The Device Statistics Screen

The following sections describe Device Statistics screen ﬁelds:

BYTES RECEIVED

Displays the number of bytes received.

FRAMES RECEIVED

Displays the number of frames received.

ERRORS RECEIVED

Displays the number of errors received.

COLLISIONS

Displays the number of collisions received.

OOW COLLISIONS

Displays the number of Out Of Window collisions. OOW collisions are usually caused by the network being too long where the round trip propagation delay is greater than 51.2 µs (the collision domain is too large), a station somewhere on the network is violating Carrier Sense and transmitting at will, or a cable somewhere on the network failed during the transmission of the packet.

CRC ERRORS

Displays the number of packets with bad Cyclic Redundancy Checks (CRC) that have been received from the network. The CRC is a 4-byte ﬁeld in the data packet that ensures that the transmitted data that is received is the same as the data that was originally sent.

ALIGNMENT ERRORS

Displays the number of errors due to misaligned packets.

RUNT PACKETS

Displays the number of runt packets received from the network. A runt packet is less than the minimum Ethernet frame size of 64 bytes, not including preamble.

GIANT PACKETS

Displays the number of packets received whose size exceeded 1518 data bytes, not including preamble.

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Chapter 7: Local Management

PORT ADMIN. STATUS

Displays the administrative status of the port selected. The two possible status messages are Enable or Disable.

PORT SEG. STATUS

Displays the segmentation status of the port selected. The two possible status messages are Segmented or Unsegmented. The SEHI and SEH automatically partition problem segments, and reconnect non-problem segments to the network.

ENABLE PORT

This command lets the user enable the selected port.

DISABLE PORT

This command lets the user disable the selected port.

UPDATE-FREQ

This command lets the user select the time interval between Stack/Module/Port counter updates. Choose update intervals up to 99 seconds in increments of 3 seconds.

MODULE

This command lets the user view statistics for a selected module in the stack. The SEHI is Module 1 and each SEH in the stack follows in sequential order. Figure 7-9 shows each module number in the stack.

SEH - MODULE 5

SEH - MODULE 4

SEH - MODULE 3

SEH - MODULE 2

SEHI - MODULE 1

1490_28

Figure 7-9 Module Number Sequence

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The Device Statistics Screen

PORT

This command lets the user view port statistics for ports 1-26 of the selected module.

Selecting the Appropriate Module/Port

When the Device Statistics screen ﬁrst appears, statistics are displayed for Module 1 and Port 1. To view statistics for another module and port, use the Module x or Port x commands at the bottom of the screen.

To select a module or port:

1. Use the arrow keys to highlight the Module or Port command.

2. Press the SHIFT and

+ keys, or the SHIFT and - keys until the desired

module or port number appears.

3. Press ENTER. Statistics associated with the selected Module and Port

appear.

Using the ENABLE PORT Command

The ENABLE PORT command lets the user enable the selected port. The user must ﬁrst use the PORT command to select the desired port.

Use the following steps to set the ENABLE PORT command:

1. Use the arrow keys to highlight the ENABLE PORT command at the

bottom of the screen.

2. Press ENTER. The corresponding port is enabled and the Port Admin

Status field is updated.

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Chapter 7: Local Management

Using the DISABLE PORT Command

The DISABLE PORT command lets the user disable the port selected in the PORT command. The user must ﬁrst use the Port command to select the desired port.

To set the DISABLE PORT command:

1. Use the arrow keys to highlight the DISABLE PORT command at the bottom of the screen.

2. Press ENTER. The corresponding port is enabled and the Port Admin Status field is updated.

Exiting the Device Statistics Screen

Use the following steps to exit the Device Statistics screen and return to the Feature Selection screen:

1. Use the arrow keys to highlight the RETURN command at the bottom of the screen.

2. Press ENTER. The Feature Selection screen appears.

7-24 SEHI User’s Guide

Page 74

APPENDIX A

EPIM INFORMATION

A.1 EPIM SPECIFICATIONS

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

A.1.1 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 crossover status of the cable pairs. If the switch is on the over. If the switch is on the over. Figure A-1 shows the pinouts for the EPIM-T in both positions.

Position X (crossed over)

X side, the pairs are internally crossed

= side, the pairs are not internally crossed

1. RX+

2. RX-

3. TX+

4. NC

SEHI User’s Guide A-1

5. NC

6. TX-

7. NC

8. NC

Position = (not crossed over)

1. TX+

2. TX-

3. RX+

4. NC

5. NC

6. RX

7. NC

8. NC

Figure A-1 EPIM-T Pinouts

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Appendix A: EPIM Information

A.1.2 EPIM-F1 and EPIM-F2

The EPIM-F1 and EPIM-F2 shown in Figure A-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.

1490_30

Figure A-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

1490_31

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).

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EPIM Speciﬁcations

A.1.3 EPIM-F3

The EPIM-F3 (Figure A-3) supports Single Mode Fiber Optic cabling. It has an internal Cabletron Systems FOT-F Fiber Optic Transceiver and is equipped with ST Connectors. EPIM-F3 speciﬁcations are listed below.

1490_32

Figure A-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).

Parameter Typical Minimum Maximum

Transmitter Peak Wave Length 1300 nm 1270 nm 1330 nm

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

-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. If you are using an Average Power Meter, add 3 dBm to the measurement to compare the average power values to the values listed above (i.e., -33.5 dBm average + 3 dBm = -30.5 dBm peak).

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Appendix A: EPIM Information

A.1.4 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 A-4 shows the setting for the terminator switch.

TERM

EPIM-C

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

1490_34

Figure A-4 EPIM-C

Connector Type

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

Grounding

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

A-4 SEHI User’s Guide

For safety, ground only one end of a thin coaxial segment. Do NOT connect EPIM BNC ports to earth ground. Connecting a thin coaxial segment to earth ground at more than one point can produce dangerous ground currents.

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EPIM Speciﬁcations

A.1.5 EPIM-A and EPIM-X (AUI Port)

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 A-5 shows both modules.

1490_35

Figure A-5 The EPIM-A and EPIM-X

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

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APPENDIX B

IMAGE FILE DOWNLOAD USING OIDs

This appendix provides instructions for setting up a TFTP server and to download an image ﬁle to the SEHI by setting speciﬁc MIB OID strings. Set the OID strings with the SNMP Tools screen described in Chapter 7, Section 7.8.

NOTE

Download an image ﬁle to the SEHI with a remote management package such as SPECTRUM, SPECTRUM Element Manager, or the appropriate SPECTRUM Portable Management Application. Refer to the speciﬁc package documentation for image ﬁle download procedures.

The SEHI supports the Standard TFTP Download application. In this application the SEHI automatically goes ofﬂine during the image download. After the download, the SEHI programs FLASH, then reboots with the new image.

Before downloading the image to the SEHI, you must complete the following steps:

1. Decompress the image file on a DOS PC using the PKUNZIP utility

included with the image.

NOTE

The PKUNZIP utility requires a DOS PC. You must decompress the image ﬁle on the DOS PC before you load the image ﬁle onto the TFTP server.

2. Load the decompressed image file onto the TFTP server.

NOTE

SEHI User’s Guide B-1

For information on how to set up a workstation as a TFTP server, ref er to your speciﬁc workstation documentation. These instructions include limited information and guidelines for setting up a UNIX workstation to work as a TFTP server.

Page 80

Appendix B: Image File Download Using OIDs

B.1 SETTING UP A UNIX WORKSTATION AS A TFTP

SERVER

Due to variations between UNIX systems and individual conﬁgurations, this section provides only GUIDELINES for conﬁguring a UNIX workstation to perform an image ﬁle download. The instructions include command examples, where appropriate. Bold lettering in examples indicates operator entry.

If unsure about how to properly conﬁgure a UNIX workstation using these guidelines, contact the Systems Administrator.

CAUTION

To set up a UNIX workstation, proceed as follows:

1. Edit the /etc/ethers file by adding the SEHI MAC address, followed by a unique name (e.g., 00:00:1d:32:0c:1b sehi).

2. Edit the /etc/hosts file by adding the SEHI MAC address and follow it with the same unique name used in step 1 (e.g., 00:00:1d:32:0c:1b sehi).

3. If the workstation already has a /tftpboot directory, confirm the TFTP setup of the workstation as follows:

Request a process status and grep for TFTP (e.g., unix% ps-aux | grep tftp).

The following information represents a typical output:

user 161 7.7 1.2 32 184 p3 S 12:00 grep tftp

root 87 0.0 0.9 48 136 ? S 11:05 tftp -s

The term tftp -s , located at the end of the root string, indicates TFTP is active. If TFTP is NOT running, only the grep process appears.

4. If the workstation does NOT have a /tftpboot directory, than create one (e.g., unix% mkdir tftpboot).

5. Ensure that the /tftpboot directory is not owned (e.g., unix% chown nobody tftpboot).

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Standard TFTP Download

NOTE

The next step requires decompression of the zipped image ﬁle. If you do not have a UNIX unzip utility, access to a PC with PKUNZIP, or a way to FTP the decompressed image to your UNIX workstation, contact Cabletron Systems Technical Support.

6. Store the hex image file in the /tftpboot directory as sehi.hex.

7. Edit the /etc/inetd.conf file by removing anything prior to the tftpboot

daemon (e.g., the # sign) that comments-out the line.

8. Kill the inetd process (e.g., unix% kill -HUP ‘process ID number’),

and then restart the process (e.g., unix% inetd), to enable the revised inetd.conf file.

NOTE

The user must request a process status and grep for inetd to obtain the process ID number (refer to step 3).

B.2 STANDARD TFTP DOWNLOAD

Table B-1 provides a step-by-step procedure for downloading the ﬁrmware image ﬁle. This section provides speciﬁc MIB OIDs, MIB names, and the required setting for proper image ﬁle download. Refer to the speciﬁc MIB walking tool documentation for instructions on how to set MIB OID strings.

The Download OIDs for CabletronSystems products reside in Cabletron Systems enterprise MIBs (group 52). The speciﬁc OIDs necessary to perform an image ﬁle download reside in the common download group under ctDL (Cabletron Download). The full OID string to reach this group is

1.3.6.1.4.1.52.4.1.5.8.1. When performing the steps in Table B-1, keep the following in mind:

• Follow the steps in order.

• Enter the IP address of the TFTP server in standard dotted decimal

notation (e.g., 132.177.118.24).

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Appendix B: Image File Download Using OIDs

• Enter the FULL path to the image ﬁle in the ctDLTFTPRequest OID, including the name of the image ﬁle (e.g., c:/tftpboot/sehi.hex).

Table B-1 Standard TFTP Download Procedure

Step OID Name OID Number

1. ctDLForceOnBoot 1.3.6.1.4.1.52.4.1.5.8.1.1.0 integer 1

2. ctDLCommitRAMToFlash 1.3.6.1.4.1.52.4.1.5.8.1.2.0 integer 1

3. ctDLTFTPRequestHost 1.3.6.1.4.1.52.4.1.5.8.1.4.0

4. ctDL TFTPRequest 1.3.6.1.4.1.52.4.1.5.8.1.5.0

5. ctDLInitiateColdBoot 1.3.6.1.4.1.52.4.1.5.8.1.3.0 integer 1

Data Type

IP address

string (ASCII)

SNMP OID Data

Enter the IP address of the TFTP server.

Enter the path to the image ﬁle.

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INDEX

Numerics

10BASE-FL

attenuation 3-2 budget and propagation delay 3-2 cable requirements 3-2

10BASE-T

cable length 3-3 crosstalk 3-4 delay 3-3 impedance 3-3 insertion loss 3-3 jitter 3-3 noise 3-4 temperature 3-4 UTP and STP specifications 3-3

AUI cable 5-9, 5-11

Cable specifications 3-1

fiber optic 3-2 UTP and STP 3-3

Cables

HubSTACK Interconnect 2-4

COM Port 3-5

Default Gateway 7-13 Device Statistics screen 7-20 Dimensions 3-8

Environmental requirements 3-8 EPIM installation 4-9

EPIM specifications 2-4

EPIM-A and EPIM-X A-5 EPIM-C A-4 EPIM-F1/F2 A-2 EPIM-F3 A-3 EPIM-T A-1

FLASH EEPROMs 2-2 FLASH Firmware Image 4-1

Help

related manuals 1-3

HubSTACK

cable requirements 3-2

HubSTACK Interconnect cables 2-4

IP address 7-12

LANVIEW 6-2

LEDs 6-3

Local Management 7-1

accessing 7-6 community name table 7-8 configuration screen 7-10 console cable 7-4 device statistics 7-20 port ENABLE override 7-13 setting default gateway 7-13 setting IP address 7-12 setting subnet mask 7-12 SNMP tools 7-16 terminal requirements 7-3 terminal setup 7-5 trap table 7-14

SEHI User’s Guide Index-1

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Index

Network connection 5-1

AUI 5-9, 5-11 EPIM-A 5-9 EPIM-C 5-8 EPIM-F1/F2/F3 5-5 EPIM-T 5-4 EPIM-X 5-11 fiber optic segment 5-5 thin coaxial 5-8 Unshielded Twisted Pair 5-4

Network port specifications

SEHI-22FL 3-4

NVRAM

pre-installation checkout 4-2 setting 6-5

OIDs 7-16 Operating specifications 3-6

Port ENABLE override 7-13 Power supply requirements 3-7

Transceiver requirements 3-5 Trap Table screen 7-14 Troubleshooting 6-1

Rack mounting

accessory kit 2-4 Remote network management 2-3 Reset 6-4

Safety requirements 3-8 SEHI features 2-2 Size

dimensions 3-8 SNMP tools screen 7-16 Subnet mask 7-12

Index-2 SEHI User’s Guide

Page 85

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 SEHI-22FL User Manual

NOTICE

CONTENTS

INTRODUCTION

1.1 USING THIS MANUAL

1.2 DOCUMENT CONVENTIONS

1.3 GETTING HELP

1.4 RELATED MANUALS

SEHI FEATURES AND OPTIONS

2.1 SEHI OVERVIEW

2.2 SEHI FEATURES

2.3 STACKABLE CAPABILITIES

2.5 OPTIONAL FEATURES

3.1 CABLE SPECIFICATIONS

3.1.1 HubSTACK Interconnect Cable Requirements

3.1.2 10BASE-FL Fiber Optic Network Requirements

3.2 NETWORK PORT SPECIFICATIONS

3.3 COM PORT REQUIREMENTS

3.4 TRANSCEIVER REQUIREMENTS

3.5 OPERATING SPECIFICATIONS

3.6 POWER SUPPLY REQUIREMENTS

3.7 ENVIRONMENTAL REQUIREMENTS

3.8 AGENCY APPROVALS

3.8.1 Safety

3.8.2 Immunity

3.8.3 Emission

3.9 PHYSICAL SPECIFICATIONS

INSTALLATION

4.1 UNPACKING THE SEHI

4.2 PRE-INSTALLATION TEST

4.3 INSTALLING THE SEHI

4.3.1 Tabletop or Shelf Installation

4.3.2 Rackmount Installation

4.3.3 Stacking the SEHI

4.4 CONNECTING THE SEHI TO THE POWER SOURCE

4.5 ADDING/REPLACING EPIMS

CONNECTING TO THE NETWORK

5.1 CONNECTING THE SEHI TO THE NETWORK

5.1.1 Connecting Network Ports

5.1.2 Connecting a UTP Segment to an EPIM-T

5.1.5 Connecting an AUI Cable to an EPIM-A

5.1.6 Connecting an AUI Cable to an EPIM-X

5.2 FINISHING THE INSTALLATION

TROUBLESHOOTING

6.1 INSTALLATION CHECKOUT

6.2 USING LANVIEW

6.3 USING THE RESET BUTTON

6.4 SETTING THE NVRAM SWITCH

LOCAL MANAGEMENT

7.2 MANAGEMENT TERMINAL SETUP

7.3 ACCESSING LOCAL MANAGEMENT

7.4 THE FEATURE SELECTION SCREEN

7.5 THE COMMUNITY NAME TABLE SCREEN

7.6 THE CONFIGURATION SCREEN

7.7 THE TRAP TABLE SCREEN

7.8 THE SNMP TOOLS SCREEN

7.9 THE DEVICE STATISTICS SCREEN

EPIM INFORMATION

A.1 EPIM SPECIFICATIONS

A.1.1 EPIM-T

A.1.2 EPIM-F1 and EPIM-F2

A.1.3 EPIM-F3

A.1.4 EPIM-C

A.1.5 EPIM-A and EPIM-X (AUI Port)

IMAGE FILE DOWNLOAD USING OIDs

B.2 STANDARD TFTP DOWNLOAD

INDEX