D-Link DES-2212 User Manual

10/100Mbps

Ethernet/Fast Ethernet

Switch

Model DES-2212

User’s Guide

Rev. 02 (October, 1997)

6DES2212..02

Printed In Taiwan

RECYCLABLE

Wichtige Sicherheitshinweise

1. Bitte lesen Sie sich diese Hinweise sorgfältig durch.

2. Heben Sie diese Anleit ung für den spät ern Gebra uch auf.

3. Vor jedem Reinigen ist das Gerät vom Stromnetz zu trennen. Vervenden Sie keine Flüssig- oder Aerosolr einiger. Am besten dient ein angefeuchtetes Tuch zur Reinigung.

4. Um eine Beschädigung des Gerätes zu vermeide n sollten Sie nur Z ubehörteile verwenden, die vom Hersteller zugelassen sind.

5. Das Gerät is vo r Feuchtigkeit zu schützen.

6. Bei der Aufstellung des G erätes ist auf siche r n Stand zu achten. Ein Kippen oder Fallen könnte Verletzungen hervorrufen. Verw enden Sie nur sichere St andorte und beachten Sie die Aufstellhinweise des Herstellers.

7. Die Belüftungsöffnungen dienen zur Luftzirkulation d ie das Gerät vor Ü b erhitzung sc hützt. Sor gen Sie dafür, daß diese Öffnungen nicht abgedeck t werden.

8. Beachten Sie beim Anschluß an das Stromnetz die Anschlußwerte.

9. Die Netzanschlußsteckdose muß aus Gründen der elektrischen Sicherheit einen Schutzleiterkontakt haben.

10. Verlege n Sie die Ne tzanschlußleitung so , daß niemand darüber fallen ka nn. Es sollete auch nichts auf de r Leitung abgestellt werden.

11. Alle Hinweise und Warnungen die sich am Ge räten befind en sind zu beachten.

12. Wird das Gerät über einen lä ngeren Zeitraum nicht benutzt, so llt en Sie es vom Stromnetz t rennen. So mit wird im Falle einer Überspannung eine Be schädigung vermie d en.

13. Durch die Lüftungsöffnungen dürfen nie mals Gegenstände oder Flüssigke iten in das G erät gelangen. Dies könnte einen Brand bzw. Elektrischen Schlag auslösen.

14. Öffnen Sie niemals das Gerät. Das Gerät darf aus Gründen der elektrischen Sicherheit nur von authorisiertem Servicepersonal geöffnet werden.

15. Wenn folgend e Situationen auftreten ist das Gerät vom Stromnetz zu trennen und von einer qua lifizierten Servicestelle zu überprüfen:

a – Netzkabel oder Netzstecker sint beschädigt. b – Flüssigkeit ist in das Gerät eingedrungen. c – Das Gerät war Feuchtigkeit ausgesetzt. d – Wenn das Gerät nicht der Bed ienungsanleitung ensprechend funktionier t oder Sie mit Hilfe dieser

Anleitung keine Verbes serung erzielen. e – Das Gerät ist gefallen und/o der das Gehäuse ist beschädigt. f – Wenn das Gerät deutliche Anzeichen eines Defektes aufweist.

16. Bei Reparaturen d ü r fen nur Orginaler satzteile bzw. den Orgina lteilen entspreche nde Teile ve r wendet werden. Der Einsatz von ungee igneten Ersatzteilen kann eine we itere Bes chädigung hervor r ufen.

17. Wenden Sie sich mit allen Fragen die Service und Repartur betreffen an Ihren Servicepartner. Somit stellen Sie die Betriebssicherheit des Gerätes sicher.

WARRANTIES EXCLUSIVE

IF THE D-LINK PRODUCT DOES NOT OPERATE AS WARRANTED ABOVE, THE CUSTOMER'S SOLE REMEDY SHALL BE, AT D-LINK'S OPTION, REPAIR OR REPLACEMENT. THE FOREGOING WARRANTIES AND REMEDIES ARE EXCLUSIVE AND ARE IN LIEU OF ALL OTHER WARRANTIES, EXPRESSED OR IMPLIED, EITHER IN FACT OR BY OPERATION OF LAW, STATUTORY OR OTHERWISE, INCLUDING WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE. D-LINK NEITHER ASSUMES NOR AUTHORIZES ANY OTHER PERSON TO ASSUME FOR IT ANY OTHER LIABILITY IN CONNECTION WITH THE SALE, INSTALLATION MAINTENANCE OR USE OF D-LINK'S PRODUCTS D-LINK SHALL NOT BE LIABLE UNDER THIS WARRANTY IF ITS TESTING AND EXAMINATION DISCLOSE THAT THE ALLEGED DEFECT IN THE PRODUCT DOES NOT EXIST OR WAS CAUSED BY THE CUSTOMER'S OR ANY THIRD PERSON'S MISUSE, NEGLECT, IMPROPER INSTALLATION OR TESTING, UNAUTHORIZED ATTEMPTS TO REPAIR, OR ANY OTHER CAUSE BEYOND THE RANGE OF THE INTENDED USE, OR BY ACCIDENT, FIRE, LIGHTNING OR OTHER HAZARD.

LIMITATION OF LIABILITY

IN NO EVENT WILL D-LINK BE LIABLE FOR ANY DAMAGES, INCLUDING LOSS OF DATA, LOSS OF PROFITS, COST OF COVER OR OTHER INCIDENTAL, CONSEQUENTIAL OR INDIRECT DAMAGES ARISING OUT THE INSTALLATION, MAINTENANCE, USE, PERFORMANCE, FAILURE OR INTERRUPTION OF A D- LINK PRODUCT, HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY. THIS LIMITATION WILL APPLY EVEN IF D-LINK HAS BEEN ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. IF YOU PURCHASED A D-LINK PRODUCT IN THE UNITED STATES, SOME STATES DO NOT ALLOW THE LIMITATION OR EXCLUSION OF LIABILITY FOR INCIDENTAL OR CONSEQUENTIAL DAMAGES, SO THE ABOVE LIMITATION MAY NOT APPLY TO YOU.

Limited Warranty

Hardware:

D-Link warr ants its hardware products to be fre e from defects in workmans hip and materials, under normal use and service, for the following lengths of time from the date of purchase from D-Link or its Authorized Reseller:

Product Type Warranty Period Network adapters Lifetime Unmanaged and managed hubs (10Mbps) Lifetime * Unmanaged and managed hubs (100Mbps) One year Managed Switches Three years * Unmanaged switches Lifetime * Repeaters, MAUs , transceivers, media converters One year Concentrators One year Internetworking products One year * Power supply and fans in these devices One year Other hardware products One year Spare parts and spare kits 90 days

If a product does not operate as warranted during the applicable warranty period, D-Link shall, at its option and expense, (1) repair the defective product or part, (2) deliver to Customer an equivalent product or part to replace the defective item. All products that are replaced will become the property of D -Link. Rep lacement products may be new or reconditioned. Any replaced or repaired product or part has a ninety (90) day warranty or the remainder of the initial warranty period, w hichever is longer. D-Link shall not be responsible for any software, firmware, information, or memory data of Customer contained in, stored on, or int egrated with any prod ucts returned to D- Link p ursuant to any warranty. All products with lifetime warranty have a standard five- year war r anty. To qualify for lifetime warranty, the enclosed Product Registration Card must be completed and returned to D-Link within ninety (90) days of purchase. Warranty service may be obtained by contacting a D-Link office within the applicable warranty period for a Return Material Authorization (RMA) number. If a Registration Card has not been previously sent, proof of purchase, such as a copy of the dated purchase invoice, must be provided. Once an RMA number is issued, the defective product must be shipped back to D-Link prepaid, insured and wrapped in the original or similar shipping pa ckage to ensure that it will not be damaged during shipment. When ret ur ning the defective product to D-Link for service, the RMA number must be marked on the outside of the shipping package. Any product returned without an RMA number shall be rejected and sent back to the Customer, and D-Link reserves the right to have Customer bear the cost of sending back such products. A service charge may or may not be levied to Customer by D-Link. To find out if a service charge is levied or not, and the charged amount, read the RMA that is returned to Customer, or ask the D-Link office when an RMA is requested.

Software:

D-Link warrants t hat the software programs licensed from it will perform in substantial confo rmance to t h e applicable published program specifications for a period of ninety (90) days from the date of purchase from DLink or its Aut horized R eseller. D-Link war rants the ma gnetic media c ontaining soft ware aga inst failure du r ing the warranty period. No updates are provided. D-Link's sole obligation hereunder shall be to replace any defective software products with products which substantially conform to D-Link's applicable published specifications. Custo me r assumes r espons ibility for the selection of the ap propriate applications program and asso ciated r eference materials. D-Link mak es no wa r ranty that its software pr oducts will work in combination with any hardware or applications software products provided by third party, that the operation of the software produc ts will be uninterrupted or er ror free , or that all defects in the software prod uct will be corrected. For any third party products listed in the D-Link software product documentation or specifications as being compatible, D-Link will make reasonable e fforts to provide c ompatibility, except where t he non-compatibility is c aused b y "bug" or defect in the third party's product.

Warranty service for software products may be obtained by contacting a D-Link office within the warranty period. Where no Product Registration Card has been sent by Customer, proof of purchase, such as a copy of the dated purchased invoice, must be provided.

D-Link Offices to Contact for Warranty Service:

To obtain an RMA number for warranty service, contact the D-Link office nearest you. A list of contact addresses for D-Link’s international offices is found in the back of this User’s Guide. Your Warranty Registr ation Car d should also be sent to your regional D-Link office.

Trademarks

Copyright 1997 D-Link Corporation. Contents subject to change without prior notice. D-Link is a registered trademark of D-Link Corporation/D-Link Systems, Inc.

All other trademarks belong to their respective proprietors.

No part of this publication may be reproduced in any form or by any means or used to make any derivative such as translation, transformation, or adaptation without permission from D-Link Corporation/D-Link Systems Inc., as stipulated by the United States Copyright Act of 1976.

FCC Warning

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 generates, uses, and can radiate radio frequency energy and, if not installed and used in accordance with this user’s guide, may cause harmful interference to radio communications. Operation of this equipment in a residential area is likely to cause harmful interference in which case the user will be required to correct the interference at his own expense.

CE Mark Warning

This is a Class A product. In a domestic environment, this product may cause radio interference in which case the user may be required to take adequate measures.

ABLE OF

ONTENTS

BOUT THIS GUIDE

0 A

NTRODUCTION

1 I

DES-2212 Ethernet/Fast Ethernet Switch.................................................1

Ports ....................................................................................................................1

Switching ............................................................................................................2

Management........................................................................................................2

100Mbps Fast Ethernet Introduction.........................................................3

100BASE-TX Technology Overview.......................................................... 3

Cables and Connectors........................................................................................3

Topology.............................................................................................................4

Network...............................................................................................................4

Hubs....................................................................................................................5

Connectivity Rules..............................................................................................5

Ethernet Switching Introduction................................................................6

XTERNAL FEATURES

2 E

Front Panel................................................................................................ 7

LED Indicators..........................................................................................9

Rear Panel............................................................................................... 10

..........................................................

.................................................................1

.......................................................7

NSTALLATION

3 I

Unpacking the Switch.............................................................................. 13

Installing the Switch ................................................................................ 14

Location ............................................................................................................14

About This Guide

................................................................13

vii

Rack Mounting..................................................................................................14

Connecting Power ................................................................................... 15

Replacing the Fuse............................................................................................16

AKING NETWORK CONNECTIONS

4 M

...................................17

10BASE-T Connection.............................................................................17

100BASE-T Connection...........................................................................18

MII Connection........................................................................................ 19

SING THE CONSOLE INTERFACE

5 U

.....................................21

Connecting to the Switch.........................................................................21

Console Usage Conventions....................................................................22

First Time Connecting To The Switch ..................................................... 23

Steps to create a Super User or General User:...................................................24

Super and General User Privileges....................................................................24

Changing your Password...................................................................................28

Adding and Deleting Users...............................................................................29

Setting up the Switch................................................................................31

TCP/IP Settings.................................................................................................31

Out-of-band management and console settings.................................................33

Software Updates..............................................................................................34

SNMP Information and Console Timeout.........................................................35

SNMP Traps......................................................................................................37

SNMP Security (Community Names)...............................................................38

Switch Configuration...............................................................................38

Controlling Individual Ports..............................................................................39

Forwarding Configuration......................................................................40

Spanning Tree Protocol and Configuration ............................................ 42

Introduction to Spanning Tree Protocol Parameters..........................................43

Setting Spanning Tree Protocol Parameters......................................................45

Monitoring the Switch .............................................................................49

viii

About This Guide

Displaying Port Statistics..................................................................................49

Resetting the Switch................................................................................. 51

System Reset.....................................................................................................51

Factory Reset.....................................................................................................52

RODUCT SPECIFICATIONS

6 P

General.................................................................................................... 55

LED Indicators........................................................................................56

Environmental and Physical....................................................................56

ABLES AND CONNECTORS

7 C

10BASE-T/100BASE-TX Connectors.......................................................57

Crossover Cable......................................................................................59

MII Connector.........................................................................................59

RS-232 (DB9) Pin Specification.............................................................. 61

OOT CONFIGURATION FILE

8 B

..............................................55

.............................................57

............................................65

NDEX

9 I

About This Guide

............................................................................68

0 A

This manual explains how to set up and use the D-Link DES-2212 12-port Ethernet/Fast Ethernet switch. The contents include:

BOUT THIS

UIDE

♦ Chapter 1 Introduction ♦ Chapter 2 External Features

(including the front panel, LED indicators, and rear panel) of the DES2212 switching hub.

♦ Chapter 3 Installation ♦ Chapter 4 Making Network Connections

switch to network stations and to other parts of your network.

♦ Chapter 5 Using the Console Interface

console interface, which you can use to configure the hub with a terminal or

♦ Appendix A Product Specifications

the standards it meets, and certifications it has passed.

♦ Appendix B Cables and Connectors

the 10BASE-T, 100BASE-TX, MII (Media Independent Interface) and console connectors on the switch.

♦ Appendix C Boot Configuration File

downloadable configuration files with the switch.

For information about how to manage your DES-2212 using a network management system, see the appropriate

telnet

Introduces the features of the DES-2212.

Introduces the external features

Tells how to unpack and install the switch.

Tells how to connect the

Explains the use of the

connection.

Lists the switch’s specifications,

Gives pinout information for

Gives details on how to use

Management User’s Guide

About This Guide

1 I

This chapter introduces the D-Link DES-2212 switch, and the technologies that it uses to give you improved network performance and reliability.

NTRODUCTION

DES-2212 Ethernet/Fast Ethernet Switch

The DES-2212 is an Ethernet/Fast Ethernet switch for networks needing improved performance, the ability to interconnect between 10Mbps and 100Mbps Ethernet networks, and SNMP network management capability.

Ports

The DES-2212 has twelve ports, four NWay 10BASE-TX Ethernet/100BASE-TX Fast Ethernet ports, and eight 10BASE-T twistedpair Ethernet ports. Among the Fast Ethernet ports, one of the ports can also use an industry-standard MII connector, making it possible to interface to different types of 100BASE-X Fast Ethernet network media, such as 100BASE-FX fiber optic cable or 100BASE-T4 twisted pair.

Another of the 100BASE-TX ports can optionally serve as an uplink port, making it possible to connect the port to a Fast Ethernet hub without using a crossover cable.

All of the ports can operate in either half-duplex or full-duplex mode. Fullduplex operation, allowing the port to transmit and receive at the same time, can double overall network bandwidth in many applications.

Switching

The DES-2212 uses store-and-forward technology to bridge packets between ports. Forwarding and filtering occurs at full “wire speed,” 148,800 packets per second (pps) for Fast Ethernet, and 14,880 pps for Ethernet. It has 2MB of buffer memory for the 10Mbps ports, and 4MB for the 100Mbps ports.

The switch automatically learns Ethernet (MAC) addresses and stores them in a forwarding table. In addition, it also supports static filtering, allowing network administrators to define custom filters for network security or other purposes.

The switch supports the IEEE 802.1d Spanning Tree Protocol, allowing you to design your network with redundant bridge links.

Management

You can use any network management software supporting SNMP (the Simple Network Management Protocol) to manage the DES-2212, including D-Link’s Windows-based D-View management system. The DES-2212’s internal intelligent management agent supports several standard SNMP MIBs, along with its own proprietary management information base.

SNMP management can be done in-band, over the Ethernet or Fast Ethernet network, or out-of-band, over the DES-2212’s RS-232 console port, using SLIP (the Serial Line Internet Protocol).

In addition, you can manage the switch with an easy-to-use console interface, either directly over the RS-232 console port, or over the network using the

Telnet protocol.

The management agent’s software is stored in Flash ROM, allowing easy upgrade over the network.

Introduction

100Mbps Fast Ethernet Introduction

Computers today have become increasingly powerful, with the capability to accommodate very sophisticated uses such as multimedia applications, videoconferencing, and CAD/CAM. To utilize these technologically advanced applications more efficiently, there is also a growing demand for faster networks that can handle heavy network traffic .

Recognizing this need for greater bandwidth and lower latency, a variety of technologies such as FDDI, ATM, and 100Mbps Fast Ethernet have been adopted by many vendors. 100Mbps Fast Ethernet technology stands out as the most inexpensive and smoothest migration path for existing 10Mbps Ethernet users.

100Mbps Fast Ethernet is a relatively new standard specified by the IEEE

802.3 networking standards committee. It is an extension of the 10Mbps

Ethernet standard with the ability to transmit and receive data at 100Mbps, while maintaining the CSMA/CD Ethernet protocol. Since the 100Mbps Fast Ethernet is compatible with all other 10Mbps Ethernet environments, it provides a straightforward upgrade without wasting the company’s existing investment in hardware, software, and tr ained personnel.

100BASE-TX Technology Overview

This section briefly describes a few of the technical aspects of using a 100Mbps Ethernet network.

Cables and Connectors

Category 5 unshielded twisted-pair (UTP) cables are supported. Cat 5 UTP cable uses the same RJ-45 connector used with 10BASE-T, wired in exactly the same configuration. However, the punch-down blocks in the wiring

Introduction

closet must be Category 5 certified. Where these blocks do not meet the standard, an upgrade is necessary.

Topology

A Fast Ethernet workgroup is configured in a star topology and is built around a maximum of two repeaters. Each workgroup forms a separate LAN (also known as a segment or collision domain), and these workgroups can be easily interconnected thr ough switches, bridges, or routers to form one LAN large enough to encompass a high-rise building or campus environment. Recent innovations in LAN hub technology such as stackable hubs, coupled with the decreasing cost of switches, bridges, and routers, allow the design of low-cost, efficient Fast Ethernet workgroups and enterprise LANs.

The following factors strongly influence the architecture of Fast Ethernet networks:

♦ The EIA/TIA 568 Wiring Standard imposes a 100 meter limit on

horizontal runs of twisted-pair cables; that is, connections from the wiring closet to the end-station.

♦ Fast Ethernet’s increased operational speed reduces the maximum

distance between all elements of the LAN (see below).

♦ The EIA/TIA 568 Wiring Standard does not support the use of coaxial

cables for horizontal wiring.

Network

Network diameter, which is the distance between two end-stations in the same collision domain, is the primary difference between traditional Ethernet and Fast Ethernet. Due to the increased speed in Fast Ethernet and adherence to the EIA/TIA 568 wiring rules, the network diameter of a Fast Ethernet collision domain is limited to 205 meters; in contrast, the maximum 10BASE-T Ethernet collision domain diameter can be up to 2500 meters.

Introduction

Hubs

Unlike 10BASE-T hubs, which are all functionally identical, Fast Ethernet repeater hubs are divided into two distinct types: Class I and Class II. A Class I hub repeats all incoming signals on one port to the other ports by first translating them to digital signals and then retranslating them back to line signals. These translations are necessary when connecting various network media to the same collision domain, such as when combining two wire-pair 100BASE-TX media with four wire-pair 100BASE-T4 media. Only one Class I hub can exist within the same collision domain, thus this type of hub cannot be cascaded. A Class II repeater, on the other hand, immediately repeats all incoming line signals on one port to the other ports; no translations are performed. This type of hub connects identical media to the same collision domain; for example, TX to TX. At most, two Class II hubs can exist within the same collision domain. The cable used to cascade these hub s is called an inter-repeater link (IRL).

As mentioned earlier, stackable hubs can be used to increase the number of available nodes in a collision domain. An entire hub stack counts as a single repeater.

Connectivity Rules

Fast Ethernet networks should respect the following limitations: ♦ The maximum length of a twisted-pair segment (that is, distance

between a port in the hub to a single-address network device such as a PC, server, or LAN switch) is 100 meters.

♦ The maximum diameter in a collision domain is about 205 meters

using two Class II hubs and 200 meters using one Class I hub.

♦ Between any two end-stations in a collision domain, there may be up

to three segments and two Class II hubs or two segments and one Class I hub.

Introduction

Ethernet Switching Introduction

Another approach to pushing beyond the limits of Ethernet technology is the development of switching technology. A switch bridges Ethernet pa ckets at the lowest (MAC address) level between 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 (also called collision domains) 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 is automatically forwarded by the switch, without interfering with any other segments. This allows the total network capacity to be multiplied, while still maintaining the same network cabling and adapter cards.

For Fast 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 collision domains, making it possible to expand your Fast Ethernet network 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 10Mbps networks and new 100Mbps networks.

Switching LAN technology is a marked improvement over the previous generation of network brid ges, which were character ized by higher latenc ies. 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.

Introduction

2 E

This chapter explains the features visible on the front and rear panels of the DES-2212 Ethernet switch.

Front Panel

A front view of the DES-2212 Ethernet switch is shown below.

XTERNAL FEATURES

♦ LED Indicator Panel Gives status information about the switch

itself, as well as each of the switch ports. The LED indicator panel is described in detail in the next section.

♦ Console Port The diagnostic console port is a standard RS-232 DB-9

connector, which can be used to connect a terminal or terminal emulator to the switch, in order to configure or manage the hub . The port can also be used for out-of-band network management. See the Using the Console Interface chapter starting on page 21 for complete information about using the console port.

♦ 100Mbps Ports The 10/100Mbps ports (ports 1 through 4) are

NWay 10BASE-T/100BASE-TX MDI-X ports, suitable for connecting directly to Et herne t o r Fa st Ethe rnet hosts o r o the r ne twork equipment. The NWay feature allows the switch to automatically detect the speed of the network connection.

♦ 10Mbps Ports The 10Mbps ports (p orts 5 thro ugh 12) are 10BASE-

TX MDI-X ports, suitable for connecting directly to Ethernet hosts or other network equipment.

♦ Uplink Port The Uplink Port is identical to Port 1, except that it is an

MDI port instead of an MDI-X port. This means that you can use it to connect directly to a Fast Ethernet hub or switch without using a crossover cable.

Note that the Uplink Port and Port 1 are really the same port, which

means you can’t connect devices to both Port 1 and the Uplink Port at the same time.

External Features

LED Indicators

♦ Power Lights when the DES-2212 Ethernet switch is powered on. ♦ Console Lights when the DES-2212 console interface is in use. ♦ MII Lights when the switch’s MII port is being used to connect to a

transceiver. If there is an active connection on the MII port, then the Link/Act LED for port 2x will also light.

♦ 100M (Ports 1 through 4 ) Lights when the port is operating at

100Mbps. Ports 1 through 4 are NWay ports that can automatically detect whether 10BASE-T Ethernet or 100BASE-TX Fast Ethernet twisted-pair cable is connected.

♦ Link/Act (Ports 1 through 12) Lights green when the port is

connected to a powered-on Ethernet/Fast Ethernet station, and blinks off briefly when information is transmitted or received on the port.

♦ FDX/Col (Ports 1 through 12) Lights green when the port is

operating in full-duplex mode. Briefly blinks amber when a collision occurs on the Ethernet/Fast Ethernet segment.

♦ System Load Shows a bar graph giving an indication of the network

load, ranging from Low to High.

External Features

Rear Panel

♦ Cooling Fans Used to control the temperature within the switch’s

enclosure. When installing the switch, be sure not to block the fan openings or otherwise restrict airflow.

♦ MII Port Used for connecting Fast Ethernet transceivers, which can

be used for attaching other Fast Ethernet media such as 100BASE-FX (fiber optic) or 100BASE-T4 (4-wire twisted pair).

The MII port is shared with Port 2. If you are using the MII port, then the

10BASE-T/100BASE-TX port labeled 2x cannot be used.

♦ Power Connector Used for connecting the power cord.

External Features

♦ Power Switch Used to turn the switch on (1 position) or off (0

position).

External Features

3 I

This chapter explains how to unpack and install your DES-2212 Ethernet switch.

NSTALLATION

Unpacking the Switch

Open the shipping carton of your hub and carefully unpack the contents. The carton should contain the following items:

♦ One DES-2212 Ethernet/Fast Ethernet switch ♦ One AC power cord ♦ Four rubber fee t to be used for shock cushioning ♦ Eight screws and two mounting brackets ♦ This User's Guide

Inspect the switch and all accompanying items. If any item is damaged or missing, report the problem immediately to your dealer.

Installing the Switch

Location

The site where you install the switch may greatly affect its performance. When installing, consider the following factors:

♦ Install the switch in a cool and dry place. See Appendix A,

Specifications, for the acceptable temperature and humidity operating ranges.

♦ Install the switch in a site free from strong electromagnetic field

generators (such as motors), vibration, dust, and direct exposure to sunlight.

♦ Leave at least 10 cm of space at the front and rear of the switch for

ventilation.

♦ Install on a sturdy, level surface that can support at least the weight of

the switch, or in an EIA standard-size rack. For information on rack installation, see the next section, Rack Mounting.

When installing the switch on a level surface, ensure to attach the rubber feet at the bottom of the device. The rubber feet act as cushioning devices.

Rack Mounting

The switch can be mounted in an EIA standard 19-inch rack, which can be placed in a wiring closet with other equipment. Attach the mounting brackets on the hub’s front panel (one on each side), and secure them with the provided screws. Then, use screws provided with the equipment rack to mount the switch in the rack.

Installation

+ 60 hidden pages