D-Link DES-1024D Manuale utente

D-Link DES-1024D

24-Port 10/100 Ethernet Switch

Manual

Rev. 080702

Building Networks for People

TABLE OF CONTENTS

About This Guide ......................................................... 1

PURPOSE ..........................................................................................1

TERMS/USAGE .................................................................................1

OVERVIEW OF THIS MANUAL.........................................................1

Introduction .................................................................. 2

FAST ETHERNET TECHNOLOGY.....................................................2

SWITCHING TECHNOLOGY.............................................................3

FEATURES ........................................................................................4

Unpacking and Setup.................................................... 5

UNPACKING .....................................................................................5

SETUP ...............................................................................................5

DESKTOP INSTALLATION................................................................5

RACK MOUNTING............................................................................6

Identifying External Components................................. 8

FRONT PANEL..................................................................................8

REAR PANEL....................................................................................9

Technical Specifications ............................................. 10

Technical Specifications ............................................. 11

Warranty and Registration .......................................... 12

ABOUT THIS GUIDE

Congratulations on your purchase of the DES-1024D 24-port

10/100Mbps Fast Ethernet Switch. This device integrates 100Mbps

Fast Ethernet and 10Mbps Ethernet network capabilities into one

highly flexible solution.

Purpose

This guide discusses how to install your DES-1024D.

Terms/Usage

In this guide, the term “Switch” (first letter upper case) refers to your 24-port

10/100Mbps Fast Ethernet Switch, and ”switch” (first letter lower case)

refers to other Ethernet switches.

Overview of this Manual

Introduction. Describes the Switch and its features.

Unpacking and Installation.Helps you get started with the basic installation

of the Switch.

Identifying External Components. Describes the front panel, rear panel and

LED indicators of the Switch.

Technical Specifications. Lists the technical (general, physical and

environmental, and performance) specifications of the Switch.

INTRODUCTION

This chapter describes the features of the DES-1024D and some background

information about Ethernet/Fast Ethernet switching technology.

Fast Ethernet Technology

Ethernet, along with its speedier counterpart Fast Ethernet, is the most

popular networking standard in use today. 100BaseT Fast Ethernet is an

extension of the 10BaseT Ethernet standard, designed to raise the data

transmission capacity of 10BaseT from 10Mbits/sec to 100Mbits/sec. An

important strategy incorporated by 100BaseT is its use of the Carrier Sense

Multiple Access with Collision Detection (CSMA/CD) protocol - which is

the same protocol that 10BaseT uses - because of its ability to work with

several different types of cable, including basic twisted-pair wiring. Both of

these features play an important role in network considerations, and they

make 100BaseT an attractive migration path for those networks based on

10BaseT. Since the 100Mbps Fast Ethernet is compatible with all other

10Mbps Ethernet environments, it provides a straightforward upgrade and

takes advantage of the existing investment in hardware, software, and

personnel training.

Switching Technology

Switching is a cost-effective way of increasing the total network capacity

available to users on a LAN. If an Ethernet network begins to display

symptoms of congestion, low throughput, slow response times, and high rates

of collision, installing a switch to a network can preserve much or all of the

existing network's cabling and workstation interface card infrastructure,

while still greatly enhancing the throughput for users. A switch is a viable

solution even if demanding applications, such as multimedia production and

video conferencing, are on the horizon. The most promising techniques, as

well as the best return on investment, could well consist of installing the right

mixture of Ethernet switches.

A switch increases capacity and decreases network loading by dividing a

local area network into different LAN segments. Dividing a LAN into

multiple segments is one of the most common ways of increasing available

bandwidth. If segmented correctly, most network traffic will remain within a

single segment, enjoying the full-line speed bandwidth of that segment.

Switches provide full-line speed and dedicated bandwidth for all connections.

This is in contrast to hubs, which use the traditional shared networking

topology, where the connected nodes contend for the same network

bandwidth. When two switching nodes are communicating, they are

connected with a dedicated channel between them, so there is no contention

for network bandwidth with other nodes. As a result, the switch reduces

considerably, the likelihood of traffic congestion.

For Ethernet networks, a switch is an effective way of eliminating the

problem of chaining hubs beyond the “two-repeater limit.” A switch can be

used to split parts of the network into different collision domains, making it

possible to expand your Ethernet network beyond the 205-meter network

diameter limit for 100BASE-TX networks. Switches supporting both

traditional 10Mbps Ethernet, 100Mbps Fast Ethernet, 1000Mbps Gigabit

Ethernet are also ideal for bridging between existing 10Mbps networks,

100Mbps networks, and new 1000Mbps networks.

Switching LAN technology is a marked improvement over the previous

generation of network hubs and bridges, which were characterized by higher

latencies. Routers have also been used to segment local area networks, but

the cost of a router, the setup and maintenance required, make routers

relatively impractical. Today switches are an ideal solution to most kinds of

local area network congestion problems.

Features

The DES-1024D is a high-performance switch designed specifically for

environments where traffic on the network and the number of users increase

continuously.

24-port 10/100BASE Ethernet Switch with RJ-45 connectors

Supports Auto-negotiation of speed and duplex modes for

each port

Supports Auto-MDI/MDI-X on each port, eliminating the

need for cross over cables or uplink ports

Wire-speed reception and transmission

Store-and-Forward switching method

Integrated address Look-Up Engine, supports 8K MAC

addresses

Supports 2.5Mbps RAM for data buffering

Front-panel diagnostic LEDs

Broadcast storm protection

IEEE 802.3x flow control for full-duplex

Back pressure flow control for half-duplex

UNPACKING AND SETUP

Unpacking

Open the shipping cartons of the DES-1024D and carefully unpack its

contents. The carton should contain the following items:

One DES-1024D 24-port 10/100Mbps Fast Ethernet Switch

One AC power cord

Four rubber feet to be used for shock cushioning

Screws and two mounting brackets

This manual

If any item is missing or damaged, please contact your local reseller for

replacement.

Setup

The setup of the DES-1024D can be performed by using the following steps:

1. The surface must support at least 11 lbs (5 kg).

2. The power outlet should be within 6 feet (1.42 meters) of the device.

3. Visually inspect the power cord and see that it is secured fully to the

AC power outlet.

4. Do not cover the ventilation holes on the sides of the Switch, and

make sure there is adequate ventilation around it.

5. Do not place heavy objects on the Switch.

Desktop Installation

When installing the DES-1024D on a desktop or shelf, the rubber feet

included with the device should be attached first, to minimize scratching or

scarring of the surface on which the Switch is placed. Attach these

cushioning feet on the bottom at each corner of the device. Allow enough

ventilation space between the device and the objects around it.

Fast Ethernet Switch installed on a Desktop or Shelf

Rack Mounting

The DES-1024D can be mounted in an EIA standard-size 19-inch rack, in a

wiring closet with other equipment. Attach the mounting brackets on each

side of the Switch’s front panel (as shown in the illustration below), and

secure them with the screws provided.

Attaching the mounting brackets to the Switch

Installing the Switch in an equipment rack

IDENTIFYING EXTERNAL COMPONENTS

Front Panel

The figure below shows the front panels of the switch.

24-port 10/100Mbps Fast Ethernet Switch

LED Indicator Panel

Refer to the next chapter for detailed information about each of the switch’s

LED indicators.

Power (PWR)

This green LED indicator illuminates when the switch is receiving power;

otherwise, it is off.

Link / Activity

This green LED indicator illuminates when the port is connected to a Fast

Ethernet or Ethernet station; the indicator blinks when transmitting or

receiving data.

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