Accton Technology CheetaHub Power-3012B Manuale utente

CheetaHub Power-3012B

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Installation Manual

CheetaHub Power-3012B

Ethernet Hub with

12 Dual-Speed RJ-45 Ports

and 1 MII Port

Two Internally Switched Repeaters for

10 Mbps and 100 Mbps Domains in One Package

No part of this document may be copied or reproduced in any form or by any means without the prior written

consent of Accton Technology Corporation.

Accton makes no warranties with respect to this documentation and disclaims any implied warranties of

merchantability, quality, or fitness for any particular purpose. The information in this document is subject to change

without notice. Accton reserves the right to make revisions to this publication without obligation to notify any person

or entity of any such changes.

International Headquarters

No. 1 Creation Road III,

Science-based Industrial Park

Hsinchu 300, Taiwan, R.O.C.

Phone: 886-3-5770-270

FAX: 886-3-5770-267

BBS: 886-3-5770-654

Internet: support@accton.com.tw

USA Headquarters

1962 Zanker Road

San Jose, CA 95112

Phone: 408-452-8900

FAX: 408-452-8988

BBS: 408-452-8828

FAST FAX: 408-452-8811

Accton and CheetaHub are trademarks or registered trademarks of Accton Technology Corporation. Other

trademarks or brand names mentioned herein are trademarks or registered trademarks of their respective

companies.

EH3012B

150611-101

E0997-R03

Package Contents i

Package Contents

Carefully unpack the contents of the package and verify them

against the checklist given below.

Package Checklist

æCheetaHub Power-3012B (Model No. EH3012B)

Ethernet hub with 12 dual-speed RJ-45 ports and 1 MII port

ætwo brackets for rack mounting

æfour rubber foot pads

æinstallation manual

æwarranty registration card

æAC power cord

Please inform your dealer immediately should there be any

wrong, missing, or damaged parts.

If possible, retain the carton, including the original packing

materials. Use them again to repack the unit in case there is a

need to return it for repair.

@To qualify for product updates and product warranty

registration, fill in the Owner Registration Card and return it

to Accton Technology Corporation.

Quick Installation iii

Quick Installation

The CheetaHub Power-3012B contains 12 RJ-45 ports for 10

Mbps or 100 Mbps Ethernet connection (detected by auto-

sensing). This dual-speed hub contains two internal repeater

buses – one for 10 Mbps traffic and another for 100 Mbps

traffic. Traffic passing between attached devices that operate at

the same speed is isolated within the appropriate repeater bus.

An internal Ethernet switch, consisting of a 10 Mbps and a 100

Mbps switching port, is used to link the repeater buses. Only

if traffic has to be passed between a 10 Mbps and a 100 Mbps

device, if the destination address is not found in the address

table, or broadcast traffic is sent, will data be forwarded to the

other internal repeater bus.

This hub provides an ideal bridge between 10 Mbps and 100

Mbps Ethernet networks, all for a price that’s comparable to a

standard Ethernet or Fast Ethernet hub. Moreover, the smart

design built into the display panel provides a friendly interface

that simplifies installation and network troubleshooting. If you

are already familiar with basic network operations, you should

be able to install this hub as described below:

1. Unpack the dual-speed CheetaHub.

2. Find a location close to the network devices you need to

connect, and within easy reach of an electrical outlet.

These hubs are suitable for

desktop or rack mounting

3. Mount the hub on a desktop or any other flat surface. If you

are installing multiple hubs, you can stack them on top of

each other (after attaching the foot pads), or install them in a

standard size EIA 19-inch rack (using the mounting brackets

supplied with the hub).

CheetaHub Power-3012B User’s Guide

iv Quick Installation

4. Connect PCs or other network devices to the RJ-45 ports.

Attach PCs or daisy-chain to

another device via the RJ-45 ports

Connect any devices that use standard network interface

cards to the RJ-45 (MDI-X) station ports (e.g., a workstation,

server, bridge or router). This hub uses auto-sensing to

dynamically set the required transmission speed at 10 Mbps

or 100 Mbps for the RJ-45 ports. To cascade to another hub

or switch, run straight-through twisted-pair cable from the

MDI port (10/100 Mbps) on this hub to any (MDI-X) station

port on the other device (or vice versa). If necessary, you

can also cascade to another hub or switch by running

crossover cable between MDI-X ports on the two devices.

Use the correct

twisted-pair cable

Use unshielded twisted-pair (UTP) or shielded twisted-pair

(STP) cable for RJ-45 connections: 100WCategory 3, 4 or 5

cable for 10 Mbps connections or 100WCategory 5 cable for

100 Mbps connections. Also be sure that the length of any

twisted-pair connection does not exceed 100 meters (328 feet).

Cascade limitations

When using the MDI port for 10 Mbps connections, note that

up to 4 hubs can be cascaded. However, when using the MDI

port for 100 Mbps connections or when using two MDI-X

ports connected with crossover cable for 100 Mbps

connections, only 2 hubs can be cascaded.

Limit total network span

When connecting devices to the dual-speed hub, note that the

total network span must be limited to:

Single Hub 200 meters of twisted-pair cable

Two-hub Chain 205 meters of twisted-pair cable (for Fast Ethernet links)

For example, if two PCs are connected to a hub, each using

100 meters (328 feet) of twisted-pair cable, then the total

network span of 200 meters (656 feet) is within the allowed

limits. However, if you cascade two Fast Ethernet hubs, and

connect a PC to each hub, each using 100 meters of cable, as

in the preceding example, then you can only use 5 meters (16

feet) of twisted-pair cable to link the two hubs together. The

only way to extend the cabling that connects the hubs is to

reduce the length of cable used to connect the PCs to the hubs.

CheetaHub Power-3012B User’s Guide

Quick Installation v

5. Connect other media types using the D-type MII port.

Attach to alternate media

types via the Class I MII port

You can also connect to other network devices using the

media independent interface (MII) on the back panel. You

can attach to 100BASE-TX (operating at 100 Mbps only),

100BASE-T4 or 100BASE-FX media types by plugging the

appropriate transceiver into the MII connector. This port can

be used to connect the hub to a collapsed backbone, or for

media conversion to a compatible network device. However,

note that the MII Port is Class I, and therefore cannot be

cascaded to another hub.

Limits on total network

span also apply to MII port

When connecting a switch or router to the MII port with

twisted-pair cable, the maximum network span is 200 meters

or 656 feet (i.e., 100 meters for the downlink from the switch

or router to the hub, and 100 meters from hub to workstation).

However, by attaching fiber-optic cable to the MII port on

the rear panel, the maximum network span can be extended

to 260 meters or 853 feet (i.e., 160 meters for the fiber optic

downlink from the hub to the switch or router, and 100

meters from hub to workstation).

6. These hubs can serve as a collapsed backbone for small

networks, or can be connected to a network interconnection

device via one of the RJ-45 ports or the MII port. (Refer to

Chapter 3 for sample applications.)

7. Verify network communications by ensuring that:

•you have made all the necessary connections

•you can access any connected resources

•the hub’s indicators are functioning properly

If you encounter any problems installing this dual-speed

CheetaHub, refer to Chapter 2 for a detailed description of

installation procedures, Chapter 3 for sample configurations, or

Appendix A for help in troubleshooting.

About this Guide vii

About this Guide

This guide is designed for the experienced network installer.

It describes how to install and operate Accton’s dual-speed

CheetaHub. After reading this manual, you should be able to

use the front display panel and configure options to manage all

your network connections.

This manual covers the following topics:

Chapter 1 - Product Overview

Brief description of Fast Ethernet technology, followed by a

description of this hub and a summary of its important features

and specifications.

Chapter 2 - Installing the System

Installing a dual-speed CheetaHub and making basic network

connections.

Chapter 3 - Setting up Network Connections

Shows sample network configurations for a local area network.

Appendices - Troubleshooting, cable assignments, and product specifications.

Contents

Contents ix

Chapter 1: Product Overview 1-1

Introduction to Fast Ethernet 1-1

Accton’s Dual-Speed CheetaHub System 1-1

Basic Features 1-2

Chapter 2: Installing the System 2-1

Pre-Installation Requirements 2-1

Hardware Installation 2-2

Stacking Hubs on a Flat Surface 2-2

Mounting Hubs in a Rack 2-3

Connecting the Hub System 2-4

Making a Connection via an MDI-X Station Port 2-4

Making a Connection via the Daisy-Chain Port 2-5

Restrictions on Cascade Length 2-6

Making a Connection via the MII Port 2-7

Providing Power to the Hub 2-8

Connecting to the Power Supply 2-8

Diagnostic Tests 2-8

Hot Remove 2-8

Fuse 2-9

Verifying Port Status 2-9

Verifying System Operation 2-10

Chapter 3: Configuring the Network 3-1

Stand-Alone Network 3-1

Cascading Hubs with the Daisy-Chain Port 3-2

Making an Uplink with Fiber Optic Cable 3-4

Appendix A: Troubleshooting A-1

Diagnosing Hub Indicators A-1

System Diagnostics A-2

Installation A-2

Configuration A-2

System Integrity A-3

CheetaHub Power-3012B User’s Guide

x Contents

Appendix B: Port and Cable Assignments B-1

RJ-45 Port B-1

MII Port B-2

Appendix C: Product Specifications C-1

Repeater Criteria C-1

Network Criteria C-1

Internal Switching Criteria C-2

Appendix D: Standards Compliance D-1

EMI Warning D-1

FCC Class B D-1

Voluntary Control Council for Interference (VCCI-B) D-2

EN55022 Declaration of Conformance D-2

Safety Compliance D-3

Underwriters Laboratories Compliance Statement D-3

Sicherheitshinweise D-4

Appendix E: Product Support Services E-1

Product Registration E-1

Problem Report E-1

Hardware Repair Service E-1

Bulletin Board Service (BBS) E-2

Interactive Fast Fax (U.S.A. Office) E-2

Technical Support E-3

Limited Warranty E-4

Customer Remedies E-4

Return Process E-5

Accton Offices E-6

Ordering Information E-6

Glossary

Index

Indice

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