D-Link DES-1048 User Guide

D-Link ™ DES-1048

Unmanaged 10/100Mbps Ethernet Switch

User’s Guide

Building Networks for People

RECYCLABLE

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Reproduction in any manner whatsoever without the written permission of D-Link Computer Corporation is strictly forbidden. Trademarks used in this text: D-Link and the D-Link logo are trademarks of D-Link Computer Corporation; Microsoft and Windows are

registered trademarks of Microsoft Corporation. Other trademarks and trade names may be used in this document to refer to either the entities claiming the marks and names or their products.

D-Link Computer Corporation disclaims any proprietary interest in trademarks and trade names other than its own. December 2005 P/N 651ES1048025G

CONTENTS

..................................................................................................................................................1 INTRODUCTION

......................................................................................................................................1 ETHERNET TECHNOLOGY

....................................................................................................................................1 SWITCHING TECHNOLOGY

...........................................................................................................................................2 SWITCH DESCRIPTION

...........................................................................................................................................................2 Features

.................................................................................................................................................................2 Ports

................................................................................................................................2 FRONT-PANEL COMPONENTS

.................................................................................................................................................2 LED Indicators

...................................................................................................................................3 REAR PANEL DESCRIPTION

.....................................................................................................................................4 SIDE PANEL DESCRIPTION

...................................................................................................................................................5 INSTALLATION

............................................................................................................................................5 PACKAGE CONTENTS

...........................................................................................................5 BEFORE YOU CONNECT TO THE NETWORK

.....................................................................................................6 INSTALLING THE SWITCH WITHOUT THE RACK

.....................................................................................................................6 INSTALLING THE SWITCH IN A RACK

............................................................................................................................................................7 POWER ON

..................................................................................................................................................7 Power Failure

...........................................................................................................................8 CONNECTING THE SWITCH

.........................................................................................................................................8 SWITCH TO END NODE

.................................................................................................................................8 SWITCH TO HUB OR SWITCH

............................................................................................9 CONNECTING TO NETWORK BACKBONE OR SERVER

.....................................................................................................................10 TECHNICAL SPECIFICATIONS

..........................................................................................................................................................11 GLOSSARY

D-Link DES-1048 Unmanaged Layer 2 Ethernet Switch

Preface

The DES-1048 User’s Guide is divided into sections that describe the system installation and operating instructions with examples.

Section 1, Introduction – A description of the physical features of the switch, including LED indicators, ports, and panel descriptions.

Section 2, Installation – A description of the physical installation of the switch as well as the packing list. Section 3, Connecting the Switch – A description of the physical installation of the switch including

connecting the switch to the network.

Appendix A, Technical Specifications – The technical specifications of the DES-1048. Glossary – Lists definitions for terms and acronyms used in this document.

Intended Readers

The DES-1048 User Guide contains information for setup and management and of the DES-1048 switch. This guide is intended for network managers familiar with network management concepts and terminology.

Notes, Notices, and Cautions

NOTE: A NOTE indicates important information that helps you make

better use of your device.

NOTICE: A NOTICE indicates either potential damage to hardware or loss of data and tells you how to avoid the problem.

CAUTION: A CAUTION indicates a potential for property damage, personal injury, or death.

D-Link DES-1048 Unmanaged Layer 2 Ethernet Switch

Safety Instructions

Use the following safety guidelines to ensure your own personal safety and to help protect your system from potential damage. Throughout this safety section, the caution icon ( ) is used to indicate cautions and precautions that you need to review and follow.

Safety Cautions

To reduce the risk of bodily injury, electrical shock, fire, and damage to the equipment, observe the following precautions.

Observe and follow service markings. Do not service any product except as explained in your system documentation. Opening or removing covers that are marked with the triangular symbol with a lightning bolt may expose you to electrical shock. Only a trained service technician should service components inside these compartments.

If any of the following conditions occur, unplug the product from the electrical outlet and replace the part or contact your trained service provider:

– The power cable, extension cable, or plug is damaged. – An object has fallen into the product. – The product has been exposed to water. – The product has been dropped or damaged. – The product does not operate correctly when you follow the ope rati n g in st ructi o ns.

• Keep your system away from radiators and heat sources. Also, do not block cooling vents.

• Do not spill food or liquids on your system components, and never operate the product in a wet

environment. If the system gets wet, see the appropriate section in your troubleshooting guide or contact your trained service provider.

• Do not push any objects into the openings of your system. Doing so can cause fire or electric shock by

shorting out interior components.

• Use the product only with approved equipment.

• Allow the product to cool before removing covers or touching internal components.

• Operate the product only from the type of external power source indicated on the electrical ratings label.

If you are not sure of the type of power source required, consu lt your service provider or local power company.

• To help avoid damaging your system, be sure the voltage selection switch (if provided) on the power

supply is set to match the power available at your location:

– 115 volts (V)/60 hertz (Hz) in most of North and South America and some Far Eastern countries such as South Korea and Taiwan

– 100 V/50 Hz in eastern Japan and 100 V/60 Hz in western Japan – 230 V/50 Hz in most of Europe, the Middle East, and the Far East

• Also be sure that attached devices are electrically rated to operate with the power available in your

location.

• Use only approved power cable(s). If you have not been provided w ith a pow er cable f or your system or

for any AC-powered option intended for your system, purch ase a power cable that is approved for use in your country. The power cable must be rated for the pro duct and for the voltage and cur rent marked on the product's electrical ratings label. The voltage and current ratin g of the cable should be greater th an the ratings marked on the product.

D-Link DES-1048 Unmanaged Layer 2 Ethernet Switch

Safety Instructions (continued)

• To help prevent electric shock, plug the system and peripheral power cables into properly grounded

electrical outlets. These cables are equipped with three-prong plugs to help ensure proper grounding. Do not use adapter plugs or remove the grounding prong from a cable. If you must use an extension cable, use a 3-wire cable with properly grounded plugs.

• Observe extension cable and power strip ratings. Make sure that the total ampere rating of all products

plugged into the extension cable or power strip does not exceed 80 percent of the ampere ratings limit for the extension cable or power strip.

• To help protect your system from sudden, transient increases and decreases in electrical power, use a

surge suppressor, line conditioner, or uninterruptible power supply (UPS).

• Position system cables and power cables carefully; route cables so that they cannot be stepped on or

tripped over. Be sure that nothing rests on any cables.

• Do not modify power cables or plugs. Consult a licensed electrician or your power company for site

modifications. Always follow your local/national wiring rules.

• When connecting or disconnecting power to hot-pluggable power supplies, if offered with your system,

observe the following guidelines: – Install the power supply before connecting the power cable to the power supply. – Unplug the power cable before removing the power supply. – If the system has multiple sources of power, disconnect power from the system by unplugging all power cables from the power supplies.

• Move products with care; ensure that all casters and/or stabilizers are firmly connected to the system.

Avoid sudden stops and uneven surfaces.

General Precautions for Rack-Mountable Products

Observe the following precautions for rack stability and safety. Also refer to the rack installation documentation accompanying the system and the rack for specific caution statements and procedures.

Systems are considered to be components in a rack. Thus, "component" refers to any system as well as to various peripherals or supporting hardware.

CAUTION: Installing systems in a rack without the front and side stabilizers installed could cause the rack to tip over, potentially resulting in b odily injury und er certain circumstances. Therefore, always install the stabilizers before installing components in the rack.

After installing system/components in a rack, never pull more than one component out of the rack on its slide assemblies at one time. The weight of more than one extended component could cause the rack to tip over and may result in serious injury.

• Before working on the rack, make sure that the stabilizers are secured to the rack, extended to the floor,

and that the full weight of the rack rests on the floor. Install front and side stabilizers on a single rack or

front stabilizers for joined multiple racks before working on the rack.

D-Link DES-1048 Unmanaged Layer 2 Ethernet Switch

Safety Instructions (continued)

Always load the rack from the bottom up, and load the heaviest item in the rack first. Make sure that the rack is level and stable before extending a component from the rack. Use caution when pressing the component rail release latches and sliding a component into or out of a rack; the

slide rails can pinch your fingers. After a component is inserted into the rack, carefully extend the rail into a locking position, and then slide the

component into the rack. Do not overload the AC supply branch circuit that provides power to the rack. Th e total rack load should not

exceed 80 percent of the branch circuit rating. Ensure that proper airflow is provided to components in the rack. Do not step on or stand on any component when servicing other components in a rack.

NOTE: A qualified el ectrician must perform all connections to DC power and to

safety grounds. All electrical wiring must comply with applicable local or national codes and practices.

CAUTION: Never defeat the ground conductor or operate the equipment in the absence of a suitably installed ground conductor. Contact t he appro priate electric al inspection authority or an electrician if you are unc ertain that suitable grounding i s available.

CAUTION: The system chassis must be positively grounded to the rack cabinet frame. Do not attempt to connect power to the system until grounding cables are connected. Completed power and safety ground wiring must be inspected by a qualified electrical inspector. An energy hazard will exist if the safety ground cable is omitted or disconnected.

Protecting Against Electrostatic Discharge

Static electricity can harm delicate components inside your system. To prevent static damage, discharge static electricity from your body before you touch any of the electronic components, such as the microprocessor. You can do so by periodically touching an unpainted metal surface on the chassis.

You can also take the following steps to prevent damage from electrostatic discharge (ESD):

1. When unpacking a static-sensitive component from its shipping carton, do not remove the component

from the antistatic packing material until you are ready to install the component in your system. Just before unwrapping the antistatic packaging, be sure to discharge static electricity from your body.

2. When transporting a sensitive component, first place it in an antistatic container or packaging.

3. Handle all sensitive components in a static-safe area. If possible, use antistatic floor pads and

workbench pads and an antistatic grounding strap.

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D-Link DES-1048 Unmanaged Layer 2 Ethernet Switch

SECTION 1

Introduction

Ethernet Technology Switch Description Features Ports Front-Panel Components Side Panel Description Rear Panel Description

Ethernet Technology

Fast Ethernet Technology

The growing importance of LANs and the increasing complexity of desktop computing applications are fueling the need for high performance networks. A number of high-speed LAN technologies are proposed to provide greater bandwidth and improve client/server response times. Among them, Fast Ethernet, or 100BASE-T, provides a non-disruptive, smooth evolution from 10BASE-T technology.

100Mbps Fast Ethernet is a standard specified by the IEEE 802.3 LAN committee. It is an extension of the 10Mbps Ethernet standard with the ability to transmit and receive data at 100Mbps, while maintaining the Carrier Sense Multiple Access with Collision Detection (CSMA/CD) Ethernet protocol.

Switching Technology

Another key development pushing the limits of Ethernet technology is in the field of switching technology. A switch bridges Ethernet packets at the MAC address level of the Ethernet protocol transmitting among connected Ethernet or Fast Ethernet LAN segments.

Switching is a cost-effective way of increasing the total network capacity available to users on a local area network. A switch increases capacity and decreases network loading by making it possible for a local area network to be divided into different segments which don’t compete with each other for network transmission capacity, giving a decreased load on each.

The switch acts as a high-speed selective bridge between the individual segments. Traffic that needs to go from one segment to another (from one port to another) is au tomatically forwarded by the switch, without interf ering with any other segments (ports). This allows the total network capacity to be multiplied, while still maintain ing the same network cabling and adapter cards.

For Fast Ethernet or Gigabit Ethernet networks, a switch is an effective way of eliminating problems of chaining hubs beyond the “two-repeater limit.” A switch can be used to split parts of the network into different co llision domains, for example, making it possible to expand your Fast Ethernet netwo rk beyond the 205-meter network diameter limit for 100BASE-TX networks. Switches supporting both traditional 10Mbps Ethernet and 100Mbps Fast Ethernet are also ideal for bridging between existing 10M bp s net w o rks and ne w 10 0M b ps net w o r ks.

Switching LAN technology is a marked improvement over the previous generation of network bridges, which were characterized by higher latencies. Routers have also been used to segment local area networks, but the cost of a router and the setup and maintenance required make routers relatively impractical. Today’s switches are an ideal solution to most kinds of local area network congestion problems.

D-Link DES-1048 Unmanaged Layer 2 Ethernet Switch

Switch Description

The DES-1048 Switch module is equipped with forty-eight ports providing dedicated 10 or 100 Mbps bandwidth. These ports can be used for connecting PCs, servers, and hubs. The forty-eight dual speed ports use standard twisted pair cabling and are ideal for segmenting networks into small, connected subnets. Each port can support up to 200 Mbps of throughput in full-duplex mode.

Features

• Forty-eight 10/100 Mbps ports for connections to other LAN switches and hubs, or directly to power

users

• IEEE 802.3 compliant 10BASE-T

• IEEE 802.3u compliant 100BASE-TX

• Full and half-duplex for both 10Mbps and 100Mbps connections. Full duplex allows the switch port to

simultaneously transmit and receive data, and only works with connections to full-duplex capable end

stations and switches. Connections to a hub must take place at half-duplex

• Store and forward switching scheme capability to support rate adaptation and protocol conversion

• Data forwarding rate 14,880 pps per port at 100% of wire-speed for 10Mbps speed

• Data forwarding rate 148,810 pps per port at 100% of wire-speed for 100Mbps speed

• Data filtering rate eliminates all error packets, runts, etc. at 14,880 pps per port at 100% of wire-speed

for 10Mbps speed

• Data filtering rate eliminates all error packets, runts, etc. at 148,810 pps per port at 100% of wire-speed

for 100Mbps speed

• Layer 2 switching based on MAC address

• Address handling: auto-learning, auto-aging

• MAC Address table: Support addresses up to 8K

• A packet buffer size of 3.2 M-bit per device (embedded)

• Auto-negotiation (NWay) between 10Mbps/100Mbps, half-duplex or full duplex for 10/100BASE-T

ports.

Ports

• Forty-eight high-performance NWay Fast Ethernet ports, all of which operate at 10/100 Mbps for

connections to end stations, servers, and hubs. All ports can auto-negotiate between 10Mbps or

100Mbps and full or half duplex.

Front-Panel Components

The front panel of the Switch consists of LED indicators, 48 (10/100 Mbps) Fast Ethernet ports.

Figure 1-1. Front Panel View of the switch

Comprehensive LED indicators display the status of the switch and the network.

LED Indicators

The LED indicators of the Switch include Power and Link/Act. The following shows the LED indicators for the Switch along with an explanation of each indicator.

D-Link DES-1048 Unmanaged Layer 2 Ethernet Switch

Figure 1-2. LED Indicators

This indicator on the front panel should be lit during the Power-On Self Test (POST).

Power

Link/Act

It will light green approximately 2 seconds after the switch is powered on to indicate the ready state of the device.

Each on-board port has a corresponding indicator. This will light steady green for a valid link and blink whenever there is reception or transmission (i.e. Activity--Act) of data occurring at a port.

Rear Panel Description

The rear panel of the switch contains a system fan and an AC power connector.

Figure 1-3. Rear panel view of the Switch

The system fan is used to dissipate heat. The AC power connector is a standard three-pronged connector that supports the power cord. Plug-in the female connector of the provided power cord into this socket, and the male side of the cord into a power outlet. The switch automatically adjusts its power settin g to any supply voltage in the range from 100 ~ 240 VAC at 50 ~ 60 Hz.

D-Link DES-1048 Unmanaged Layer 2 Ethernet Switch

Side Panel Description

The sides of the system provide heat vents that help to dissipate heat. Do not block these openings, and leave at least 6 inches of space at the rear and sides of the switch for proper ventilation. Be reminded that without proper heat dissipation and air circulation, system components might overheat, which could lead to system failure.

Figure 1-4. Side Panels (the left-hand panel is pictured on top)

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