NETGEAR ETHERNET SWITCH SW108 Manual de usuario

M-SW108NA-0

June 1997

NETGEAR

, Inc.

A Bay Networks Company

48015 Warm Springs Blvd.

Fremont, CA 94539

USA

Installation Guide for

the Model SW108

Ethernet Switch

SW108.BK Page i Friday, June 27, 1997 10:48 AM

Trademarks

Bay Networks is a registered trademark of Bay Networks, Inc. NETGEAR is a trademark of Bay Networks, Inc.

Other brand and product names are registered trademarks or trademarks of their respective holders.

Statement of Conditions

In the interest of improving internal design, operational function, and/or reliability, NETGEAR reserves the right to

make changes to the products described in this document without notice.

NETGEAR does not assume any liability that may occur due to the use or application of the product(s) or circuit

layout(s) described herein.

Federal Communications Commission (FCC) Declaration of Conformity Statement

Note: This equipment has been tested and found to comply with the limits for a ClassA 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 generates, uses, and can radiate radio frequency

energy. If it is not installed and used in accordance with the instruction manual, it may cause harmful interference to

radio communications. Operation of this equipment in a residential area is likely to cause harmful interference, in which

case users will be required to take whatever measures may be necessary to correct the interference at their own expense.

EN 55 022 Statement

This is to certify that the NETGEAR Model SW108 switch is shielded against the generation of radio interference in

accordance with the application of Council Directive 89/336/EEC,Article 4a. Conformity is declared by the application

of EN 55 022 Class A (CISPR 22).

Bestätigung des Herstellers/Importeurs

Es wird hiermit bestätigt, daß das NETGEAR Model SW108 switch gemäß der im BMPT-AmtsblVfg 243/1991 undVfg

46/1992 aufgeführten Bestimmungen entstört ist. Das vorschriftsmäßige Betreiben einiger Geräte (z.B.Testsender) kann

jedoch gewissen Beschränkungen unterliegen. Lesen Sie dazu bitte die Anmerkungen in der Betriebsanleitung.

Das Bundesamt für Zulassungen in der Telekommunikation wurde davon unterrichtet, daß dieses Gerät auf den Markt

gebracht wurde und es ist berechtigt, die Serie auf die Erfüllung der Vorschriften hin zu überprüfen.

Warning:

This is a ClassA product. In a domestic environment, this product may cause radio interference, in

which case, the user may be required to take appropriate measures.

SW108.BK Page ii Friday, June 27, 1997 10:48 AM

iii

Voluntary Control Council for Interference (VCCI) Statement

This equipment is in the ﬁrst 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 Data Processing Equipment and

Electronic Ofﬁce Machines that are aimed at preventing radio interference in commercial and/or industrial areas.

Consequently, when this equipment is used in a residential area or in an adjacent area thereto, radio interference may be

caused to equipment such as radios and TV receivers.

Customer Support

For assistance with installing and conﬁguring your NETGEAR system or with post-installation questions or problems,

contact your point of purchase representative.

To contact customer support or to purchase additional copies of this document and publications for other NETGEAR

products, you can contact NETGEAR at the following numbers:

• Phone:

U.S./Canada: 1-800-211-2069

Japan: 0031-1-26133

Europe: (44) 171-571-5120

Australia: 1- 800-14-20-46

• Fax:

U.S./Canada: 510-498-2609

World WideWeb

NETGEAR maintains a World Wide Web Home Page that you can access at the universal resource locator (URL)

http://NETGEAR.baynetworks.com. A direct connection to the Internet and a Web browser such as Internet Explorer

or Netscape are required.

SW108.BK Page iii Friday, June 27, 1997 10:48 AM

SW108.BK Page iv Friday, June 27, 1997 10:48 AM

Contents v

Contents

Chapter 1

Introduction

Beneﬁts of Using Switching Technology .........................................................................1-1

Types of Ethernet Switches ............................................................................................1-2

Model SW108 Switch Overview .....................................................................................1-2

Features .........................................................................................................................1-3

Chapter 2

Physical Description

Front Panel .....................................................................................................................2-1

Ethernet Ports ..........................................................................................................2-2

Normal/Uplink Push Button ......................................................................................2-2

LEDs ........................................................................................................................2-3

Rear Panel ......................................................................................................................2-4

FDX and HDX Duplex Toggle Switches ...................................................................2-4

Chapter 3

Applications

Desktop Switching ..........................................................................................................3-2

Segment Switching .........................................................................................................3-3

Chapter 4

Installation

Preparing the Site ...........................................................................................................4-1

Package Contents ..........................................................................................................4-1

Installing the Switch on a Desktop ..................................................................................4-2

Connecting Devices to the Switch ..................................................................................4-2

Verifying Installation ........................................................................................................4-3

SW108.BK Page v Friday, June 27, 1997 10:48 AM

vi Contents

Chapter 5

Troubleshooting

Troubleshooting the Switch and the Network .................................................................5-1

Appendix A

Technical Speciﬁcations

General Speciﬁcations ................................................................................................... A-1

Appendix B

Connector Pin Assignments

RJ-45 Plug and vista RJ-45 Connector ......................................................................... B-1

Appendix C

Cabling Guidelines

Ethernet Technology ......................................................................................................C-1

Cable Speciﬁcations ......................................................................................................C-1

Twisted Pair Cables .......................................................................................................C-2

Index

SW108.BK Page vi Friday, June 27, 1997 10:48 AM

Figures vii

Figures

Figure 2-1. Front panel of the Model SW108 switch ..................................................2-1

Figure 2-2. The vista RJ-45 connector with built-in LEDs ..........................................2-2

Figure 2-3. Rear panel of the Model SW108 switch ...................................................2-4

Figure 3-1. Using the Model SW108 switch for desktop switching .............................3-2

Figure 3-2. Model SW108 switch used as a segment switch .....................................3-3

Figure B-1. RJ-45 plug and vista RJ-45 connector with built-in LEDs ....................... B-1

Figure C-1. Straight-through twisted pair cable .........................................................C-3

Figure C-2. Crossover twisted pair cable ...................................................................C-3

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viii Tables

Tables

Table 2-1. LED descriptions ......................................................................................2-3

Table 5-1. Troubleshooting ........................................................................................5-1

Table B-1. RJ-45 plug and vista RJ-45 connector pin assignments ......................... B-2

Table C-1. Electrical requirements of Category 3, 4, and 5 cables ..........................C-2

SW108.BK Page viii Friday, June 27, 1997 10:48 AM

Introduction 1-1

Chapter 1

Introduction

Congratulations on your purchase of the NETGEAR

™

Model SW108 8-port Ethernet Switch.

The Model SW108 switch segments Ethernet networks to relieve bandwidth congestion instantly,

without having to replace network wiring, interface cards, or software.

This guide describes how to install and use the switch. It includes physical conﬁguration

guidelines for connecting multiple 10 megabit per second (Mbps) hubs and for connecting

10 Mbps Ethernet stations, PCs, and servers.

Beneﬁts of Using SwitchingTechnology

Most of installed networks today are based on shared network technology. With this technology,

a number of users or groups of users share 10 Mbps, 100 Mbps, or other amounts of available

network bandwidth (network capacity). For example, with a total of 10 users, the average

bandwidth available to each user on a 10 Mbps network is calculated as 10/10 Mbps, or 1 Mbps

of bandwidth per user.

Ethernet switches signiﬁcantly increase network throughput by segmenting network trafﬁc. They

check trafﬁc coming in to each port to learn which network device is located on which segment.

Based on this information, switches forward cross-segment trafﬁc only to the appropriate segment.

The trafﬁc will not show up in the other segments since it is ﬁltered out. In this way, network

capacity is fully reserved for trafﬁc destined for that segment only, and other segments are not

saturated with unnecessary trafﬁc.

Ethernet switches provide private, dedicated, 10 Mbps capacity to each connected PC/server or

hub/workgroup segment, which is signiﬁcantly higher than in a shared environment. The higher

bandwidth enables applications such as multimedia, imaging, video, or high- performance

client-server functions among users who are spread out over the network.

SW108.BK Page 1 Friday, June 27, 1997 10:48 AM

Installation Guide for the Model SW108 Ethernet Switch

1-2 Introduction

This bandwidth improvement is accomplished very easily, with no change to the desktop (the

network interface cards or software, and network wiring). As a result, the performance upgrade

and the applications it enables are obtained very quickly and at a low cost.

Types of Ethernet Switches

Ethernet switches can be classiﬁed in different ways—as desktop switches or segment switches.

desktop switch

is designed to support one or a few PCs per port. It is generally used when

users need the full 10 Mbps network throughput to support the applications. Often, these switches

support only a single MAC (media access control) address per port, and are relatively inexpensive

compared to a segment switch.A

segment switch

, in contrast, is designed to support an entire

workgroup on each port, with each port having signiﬁcant memory buffering and supporting

thousands of MAC addresses.

Switches can also be classiﬁed by speed. As the name suggests, 10 Mbps switches support only

10 Mbps connections. Similarly, 100 Mbps switches support only 100 Mbps connections. Usually,

10/100 Mbps switches have primarily 10 Mbps ports with one or few 100 Mbps ports.Autosensing

10/100 Mbps switches support 10 Mbps or 100 Mbps connections on each port and are the most

versatile and adaptable switch type.

Model SW108 Switch Overview

The Model SW108 switch is a 10 Mbps switch that can be used as either a segment or a desktop

switch. Its design enables it to function as a segment switching, yet its pricing makes the switch

very affordable for use in desktop applications.

Up to 4 switching paths (8 paths in full-duplex mode) can be established at the same time, with

each path crossing two ports, performing switching that sends packets to the appropriate port

according to the destination address scanned from the packet header. This technique reduces the

latency of packet transmission to 75 microseconds (

s) or less. Compared to approximately 800

for a bridge or 1800

s for a router, the Model SW108 switch delivers a major improvement in the

network performance.

Because the Model SW108 switch is a device functioning on the MAC layer, the switch is protocol

independent and is compatible with IEEE802.3, IEEE802.3u, TCP/IP, NetWare, DECnet, and

XNS protocols.

SW108.BK Page 2 Friday, June 27, 1997 10:48 AM

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