D-Link DES-3208 User Manual

DES-3208

10/100 Fast Ethernet Switch

User’s Guide

Rev. 02 (January, 1998)

6DES3208..02

Printed In Taiwan

RECYCLABLE

Wichtige Sicherheitshinweise

1. Bitte lesen Sie sich diese Hinweis e s o rgfältig durc h.

2. Heben Sie diese Anleitung für den spätern Gebrauch auf.

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

4. Um eine Beschädigung des Gerätes zu vermeiden sollten Sie nur Zubehörteile verwenden, die vom
Hersteller zugelassen sind.

5. Das Gerät is vor Feuchtigkeit zu schützen.

6. Bei der Aufstellung des Gerätes ist auf sichern Stand zu achten. Ein Kippen oder Fallen könnte
Verletzungen hervorrufen. Verwenden Sie nur sichere Standorte und beachten Sie die Aufstellhinweise
des Herstellers.

7. Die Belüftungsöffnungen dienen zur Luftzirkulation die das Gerät vor Überhitzung schützt. Sorgen Sie
dafür, daß diese Öffnungen nicht abgedeckt werden.

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

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

10. Verlegen Sie die Netzanschlußleitung so, daß niemand darüber fallen kann. Es sollete auch nichts auf der
Leitung abgestellt werden.

11. Alle Hinweise und Warnungen die sich am Geräten befinden sind zu beachten.

12. Wird das Gerät über einen längeren Zeitraum nicht benutzt, so llten Sie es vom Stromne tz tre nnen. Somit
wird im Falle einer Überspannung eine Beschädigung vermieden.

13. Durch die Lüftungsöffnungen dürfen niemals Gegenstände oder Flüssigkeiten in das Gerät 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 folgende Situationen auftreten ist das Gerät vom Stromnetz zu trennen und von einer qualifizierten
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 Bedienungsanleitung ensprechend funktioniert oder Sie mit Hilfe dieser

Anleitung keine Verbesserung erzielen.
e – Das Gerät ist gefallen und/oder das Gehäuse ist beschädigt.
f – Wenn das Gerät deutliche Anzeichen eines Defe ktes a ufwe ist.

16. Bei Reparaturen dürfen nur Orginalersatzteile bzw. den Orginalteilen entsprechende Teile verwendet
werden. Der Einsatz von ungeeigneten Ersatzteilen kann eine weitere Beschädigung hervorrufen.

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 warrants its hardware products to be free from defects in workmanship and materials, under normal use
and service, for the following lengths of time from the date of purc ha s e from D-Link or its Authorize d
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. Replacement
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, whichever is longer.
D-Link shall not be responsible for any software, firmware, information, or memory data of Customer
contained in, stored on, or integrated with any products returned to D-Link pursuant to any warranty.
All products with lifetime warranty have a standard five-year warranty. 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 package to ensure that it will not be damaged during shipment. When returning 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 that the software programs license d from it will perform in substantial conformance to the
applicable published program specifications for a period of ninety (90) days from the date of purchase from D­Link or its Authorized Reseller. D-Link warrants the magnetic media containing software against failure
during 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. Customer assumes responsibility for the selection of the appropriate applications program and
associated reference materials. D-Link makes no warranty that its software products will work in combination
with any hardware or applications software products provided by third party, that the operation of the software
products will be uninterrupted or error free, or that all defects in the software product 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 efforts to provide compatibility, except where the non-compatibility is caused by
"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
Registration Card should also be sent to your regional D-Link office.

Trademarks

Copyright 1998 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.

Copyright Statement

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 exp ense.

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.

T

ABLE OF

0 ABOUT THIS GUIDE.............................................................................. V

C

ONTENTS

ERMS

T
O

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

F
S
F

2 UNPACKING AND SETUP......................................................................5

U
S
D
R
P

3 IDENTIFYING EXTERNAL COMPONENTS.....................................10

F
R
LED I

4 CONNECTING THE SWITCH..............................................................15

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

VERVIEW OF THIS USER’S GUIDE

AST ETHERNET TECHNOLOGY
WITCHING TECHNOLOGY
EATURES

Ports.......................................................................................................... 3

Performance features................................................................................ 3

Management..............................................................................................4

NPACKING

ETUP

ESKTOP OR SHELF INSTALLATION
ACK INSTALLATION
OWER ON

Power Failure........................................................................................... 9

RONT PANEL
EAR PANEL

.....................................................................................................3

..................................................................................................5

...........................................................................................................6

....................................................................................................8

.............................................................................................10

...............................................................................................11

NDICATORS

.............................................................................2

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

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

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

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

...............................................................6

V
V

TO SWITCH

PC

UB TO SWITCH

H

10Base-T Hub.........................................................................................17

100Base-TX Hub..................................................................................... 17

UB WITHOUT UPLINK

H

About This Guide

............................................................................................15

..........................................................................................16

(MDI-II)

PORT

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

i

Using straight cable................................................................................ 18

Using crossover cable............................................................................. 18

WITCH TO SWITCH (OTHER DEVICES

S

).........................................................18

Using straight cable................................................................................ 19

Using crossover cable............................................................................. 19

5 SWITCH MANAGEMENT ....................................................................20

OCAL CONSOLE MANAGAMENT

L

................................................................20

Console port (RS-232 DCE.....................................................................21

IP Addresses and SNMP Community Names..........................................21

Traps....................................................................................................... 22

MIBs........................................................................................................ 23

Packet Forwarding.................................................................................24

Aging Time..............................................................................................25

Spanning Tree Algorithm........................................................................ 25

STA Operation Levels.............................................................................26

On the Bridge Level.........................................................................................26

On the Port Level.............................................................................................27

User-Changeable Parameters.................................................................27

Illustration of STA................................................................................... 29

6 USING THE CONSOLE INTERFACE.................................................32

ONNECTING TO THE SWITCH

C

ONSOLE USAGE CONVENTIONS

C

IRST TIME CONNECTING TO THE SWITCH

F

.....................................................................32

.................................................................33

.................................................34

Steps to create a Super User or General User:......................................35

Super and General User Privileges........................................................35

LOGIN ON THE SWITCH CONSOLE BY REGISTERED USERS.......38

Changing Your Password....................................................................... 39

Adding and Deleting Users..................................................................... 40

ETTING UP THE SWITCH

S

.............................................................................42

TCP/IP Settings.......................................................................................42

Out-of-band management and console settings...................................... 44

Software Updates....................................................................................45

System Configuration Menu.................................................................... 46

SNMP M

ANAGEMENT SETTINGS

................................................................47

SNMP Trap Manager Configuration......................................................47

SNMP Manager Configuration...............................................................49

SNMP Security (Community Names)..............................................................49

ii

About This Guide

Port Configuration.................................................................................. 50

WITCH MONITORING

S

.................................................................................51

Displaying Port Statistics........................................................................51

PANNING TREE ALGORITHM PARAMETERS

S

...............................................53

Forwarding Table................................................................................... 54

Custom Filtering Table........................................................................... 55

Protocol Parameters...............................................................................58

STAP Port Parameters............................................................................59

ESETTING THE SWITCH

R

..............................................................................60

System Reset............................................................................................ 61

Factory Reset.......................................................................................... 61

7 TECHNICAL SPECIFICATIONS.........................................................63

8 RJ-45 PIN SPECIFICATION.................................................................66

9 MII CONNECTOR SPECIFICATIONS ............................................... 68

10 INDEX.....................................................................................................71

About This Guide

iii

10/100 Fast Ethernet Switch User’s Guide

0 A

This User’s guide tells you how to install your DES-3208, how to connect it
to your Fast Ethernet network, and how to set its configuration using the built

-in console interface.

BOUT THIS

G

UIDE

Terms

For simplicity, this documentation uses the terms “ Switch” (first letter upper
case) to refer to the DES-3208 10/100 Fast Ethernet Switch, and “ switch”
(first letter lower case) to refer to all Ethernet switches, includ ing the DES-

3208.

Overview of this User’s Guide

Chapter 1,

♦

Introduction

. Describes the switch and its features.

Chapter 2,

♦

installation of the switch.
Chapter 3,

♦

frontpanel, rear panel and LED indicators of the switch.
Chapter 4,

♦

DES-3208 to your Fast Ethernet network.

About This Guide

Unpacking and Setup

Identifying External Components

Connecting the Switch

. Helps you get started with the basic

. Tells how you can connect the

. Describes the

v

10/100 Fast Ethernet Switch User’s Guide

Chapter 5,

♦

Switch Management

. Talks about Local Console
Management via the RS-232 DCE console port and other aspects
about how to manage the Switch.

Chapter 6,

♦

Using the Console Interface

. Tells how to use the built-in
console interface to change, set and monitor Switch performance and
security.

Appendix A,

♦

Technical Specifications

. Lists the technical

specifications of the DES-3208.
Appendix B,

♦

RJ-45 Pin Specifications

. Shows the details and pin

assignments for the RJ-45 receptacle/ connector.
Appendix C,

♦

MII Port Specifications

.

vi

About This Guide

10/100 Fast Ethernet Switch User’s Guide

1

1 I

This section describes the features of the DES-3208, as well as giving some
background information about Ethernet/ Fast Ethernet switching technology.

NTRODUCTION

Fast Ethernet Technology

The growing importance of LAN s 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
the current 10Base-T technology. The non-disruptive and smooth evolution
nature, and the dominating potential market base, virtually guarantee cost
effective and high performance Fast Ethernet solutions in the years to come.

100Mbps Fast Ethernet is a new 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
CSMA/CD Ethernet protocol. Since the 100Mbps Fast Ethernet is
compatible with all other 10Mbps Ethernet environments, it provides a
straightforward upgrade and takes advantage of the company’s existing
investment in hardware, software, and personnel training.

Introduction

1

10/100 Fast Ethernet Switch User’s Guide

Switching Technology

Another approach to pushing beyond the limits of Ethernet technology is the
development 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
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.

segments

which don’t compete with each other for

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.

2

Introduction

10/100 Fast Ethernet Switch User’s Guide

Features

The DES-3208 Switch was designed for easy installation and high
performance in an environment where traffic on the network and the number
of users increase continuously.

The DES-3208 Switch features:

Ports

8 high performance N-way ports all operating at 10/100 Mbps for

♦

connection to servers and hubs. All ports can be auto-negotiated
between 10Mbps/ 100Mbps, Half-duplex or full duplex connections.

Uplink/ MDI-II (media dependent interface) port for uplink to

♦

another switch, hub or repeater.
RS-232 DCE console port for diagnosing the Switch via a connection

♦

to a PC and Console/ Out-of-band management.
MII (Media Independent Interface) flexible media connection port for

♦

connection to different physical layer devices (e.g. fiber )

Performance features

Store and forward switching scheme capability to support rate

♦

adaptation and protocol conversion.
Full and Half-duplex (for both 10Mbps and 100Mbps) to allow two

♦

communicating stations to transmit and receive at the same time.
Auto polarity detection for correction of incorrect polarity on the

♦

receive twisted pair at each port.

Introduction

3

10/100 Fast Ethernet Switch User’s Guide

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

♦

10Mbps speed.
Data forwarding rate 148,800 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 148,800

♦

pps per port at 100% of wire-speed for 100Mbps speed.
8K active MAC address entry table per device with self learning and

♦

table aging.
8 MB packet buffer per device.

♦

Supports broadcast storm rate filtering.

♦

Management

RS-232 console port for out-of-band network management via a PC.

♦

Spanning Tree Algorithm Protocol for creation of alternative backup

♦

paths and prevention of indefinite network loops.
D-View Network Management Program for standard SNMP-based

♦

management.
Fully configurable either in-band or out-of-band control via SNMP

♦

based software.
Flash memory for software up-grade. This can be done in-band via

♦

BOOTP/TFTP. D-View or out-of-band console can also initiate a
download request.

Built-in SNMP management: MIB-I (RFC 1156), MIB-II (RFC

♦

1213), Bridge MIB (RFC 1268) and D-Link proprietary MIB.

4

Introduction

10/100 Fast Ethernet Switch User’s Guide

2

2 U

This chapter provides unpacking and setup information for the Switch.

NPACKING AND

S

ETUP

Unpacking

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

One DES-3208 10/100 Fast Ethernet Switch

♦

Accessory pack: 2 mounting brackets and screws

♦

Four rubber feet with adhesive backing

♦

1 AC power cord

♦

This user’s guide with Registration Card

♦

Diskette containing management software

♦

If any item is found missing or damaged, please contact your local D-Link
Reseller for replacement.

Unpacking and Setup

5

10/100 Fast Ethernet Switch User’s Guide

Setup

The setup of the Switch can be performed using the following steps:

The surface must support at least 3 Kg.

♦

The power outlet should be within 1.82 meters (6 feet) of the device.

♦

Visually inspect the power cord and see that it is secured fully to th e

♦

AC power connector.
Make sure that there is proper heat dissipation from and adequate

♦

ventilation around the Switch. Do not place heavy objects on the
Switch.

Desktop or Shelf Installation

When installing the Switch on a desktop or shelf, the rubber feet included
with the device must be first attached. 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.

6

Unpacking and Setup

10/100 Fast Ethernet Switch User’s Guide

Figure 2-1. 10/100 Fast Ethernet Switch installed on a Desktop or

Shelf

Rack Installation

The DES-3208 can be mounted in an EIA standard size, 19-inch rack, which
can be placed in a wiring closet with other equipment. To install, attach the
mounting brackets on the switch’s front panel (one on each side) and secure
them with the screws provided.

Figure 2- 2A. A ttaching the mounting brackets to the 10/100 Fast

Ethernet Switch

Then, use the screws provided with the equipment rack to mount the Switch
in the rack.

Unpacking and Setup

7

10/100 Fast Ethernet Switch User’s Guide

Figure 2-2B. Installing the 10/100 Fast Ethernet Switch in an

equipment rack

Power on

The DES-3208 Switch can be used with AC power sources 100 - 240 VAC,
50 - 60 Hz. The power switch is located at the rear of the unit adjacent to the
AC power connector and the system fan. The Switch’s power supply will
adjust to the local power source automatically and may be turned on without
having any or all LAN segment cables connected.

After the power switch is turned on, the LED indicators should respond as
follows:

All LED indicators will momentarily blink . This blink ing of the LED

♦

indicators represents a reset of the system.

8

Unpacking and Setup

10/100 Fast Ethernet Switch User’s Guide

The FDX/Col LED indicators blink from

♦

The power LED indicator will light yellow while the switch loads

♦

onboard software and performs a self-test. After approximately 20
seconds, the LED will light green to indicate the switch is in a ready
state.

The console LED indicator will remain ON if there is a connection at

♦

the RS-232 port, otherwise this LED indicator is
The MII LED indicator will remain ON if there is a connection at the

♦

MII port, otherwise this LED indicator is
connection at the MII port, The MII LED, and the 100M and Link/Act
LED indicators for port 2x will remain ON, otherwise the Link/Act
LED indicators are OFF. The 100M LED indicator may remain ON
or OFF depending on the transmission speed.

The System Load LED indicators will momentarily b lin k.

♦

yellow to green

.

OFF

. If there is an active

OFF

.

Power Failure

As a precaution, the Switch should be turned
When power is resumed, turn the Switch ON. At all times, av oid leaving the
Switch ON after the occurrence of a power failure.

OFF

in case of power failure.

Unpacking and Setup

9

10/100 Fast Ethernet Switch User’s Guide

3

3 I

This chapter describes the front panel, rear panel and LED indicators of the
Switch

DENTIFYING

E

XTERNAL

C

OMPONENTS

Front Panel

The front panel of the Switch consists of 8 (10/100 Mbps) MDI-X ports, 1
uplink (MDI-II) port, a RS-232 communication port and LED indicators.

Figure 3-1. Front panel view of the DES-3208 Switch

8 high performance N-way (MDI-X) ports all operating at 10/100

♦

Mbps for connection to servers and hubs. All ports can be auto­negotiated between 10Mbps or 100Mbps.

10

Identifying External Components

10/100 Fast Ethernet Switch User’s Guide

Port 2x (Port number two) is a shared connection with the (Media

♦

Independent Interface) MII port in the back of the Switch. Note that,
whenever there is a connection at the MII port, port 2x is unavailable
for connection to other devices.

Uplink/ MDI-II (media dependent interface) port for uplink to

♦

another switch, hub or repeater.
RS-232 DCE console port for diagnosing the Switch via a connection

♦

to a PC and Local Console Management.
Comprehensive LED indicators that display the conditions of the

♦

Switch and status of the network. A description of these LED
indicators follow (see

LED Indicators

).

Rear Panel

The rear panel of the Switch consists of a power switch, an AC power
connector, system fans and MII port. The following shows the rear panel of
the Switch.

Figure 3-2. Rear panel view of the DES-3208

Power Switch.

♦

system, press the switch to the “ 1” position; to turn off, press the
switch to the “0” position.

Identifying External Components

This turns the Switch on and off. To turn on the

11

10/100 Fast Ethernet Switch User’s Guide

AC Power Connector.

♦

supports the power cord. Plug in the female connector of the
provided power cord into this connector, and the male into a power
outlet. Supported input voltages range from 100 ~ 240 VAC at 50 ~
60 Hz.

System Fan.

♦

also to dissipate heat. The sides of the system also provide heat vents
to serve the same purpose. Do not block these openings, and leave
adequate 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.

MII Connector.

♦

connector is a 40 pin connector for use with flexible media (e.g. fiber
cable).

This connector has a shared connection with port 2x, and when
connected, the MII connector takes operational precedence over port
2x.

If you are using a 100BASE-FX Transceiver, This connector is

◊

used for connection between two independent locations up to a
distance of

These fan are used to circulate air inside the Switch and

two kilometers

This is a three-pronged connector that

The MII (Media Independent Interface) interface

.

If you are using a 100BASE-TX Transceiver, this connector is

◊

used for connection between two independent location up to a
distance of

When you are connecting a 100BASE-FX or TX Transceiver to the
MII connector prior to making cable connections, make sure that the
100BASE-FX or TX Transceiver address setting is set to “ 2,” (See
the Transceiver manufacturer user’s guide for more information). The
pin specifications for this connector appear in

Note

: When making cable or transceiver connections

100 meters

.

Appendix C

to the MII inteface connector, make sure that

12

Identifying External Components

10/100 Fast Ethernet Switch User’s Guide

the the Switch is

turned off

after connecting
turn the Switch on. When disconnecting a
cable or transceiver from the MII interface
connector,

turn off

the Switch then disconnect

the cable or transceiver.

LED Indicators

The LED indicators of the Switch include Power, MII, Console, 100 M,
Link/Act FDX/Col and System Load. The following shows the LED
indicators for the Switch along with an explanation of each indicator.

Figure 3-3. The DES-3208 Switch LED indicators

Power

♦

♦

Identifying External Components

. After turning on the power, the Power indicator, on the front
panel, should light yellow to indicate the switch is loading onboard
software and performing a self-test. After approximately 20 seconds,
the green LED lights to indicate the ready state of the switch.

MII.

The MII (Media Independent Interface) is used for connection

between two independent locations up to a distance of two kilometers.

13

10/100 Fast Ethernet Switch User’s Guide

After the system’s initial check and power is on , this LED in dicator is

ON

(

) when a secured connection is established at the port,

green

otherwise it is

OFF

.

♦

Console.

This LED indicator is lit when the switch is being managed
via out-of-band/ local console management through the RS-232
console port using a straight-through serial cable. When a secured
connection is established, this LED ind icator is lit

. Otherwise, it

green

is OFF.

100 M

♦

. These LED indicators are illuminated (

) when a 100

green

Mbps device is connected to any of the 8 ports or uplink port. If a 10
Mbps device is connected to any of the 8 ports or uplink port, these
LED indicators are

Link/Act

♦

. These LED indicators are lighted up (

OFF

.

) when there is

green

a secure connection (or link) to a device at any of the ports. The LED
indicators blink (

) whenever there is reception or transmission

green

(i.e. Activity--Act) of data occurring at a port.

FDX/Col

♦

. This LED indicator is

when a respective port is in

green

full duplex (FDX) mode. Otherwise, it is OFF for half duplex (HDX)
operations. It blinks

when collisions are occurring on the

yellow

respective port.

System Load.

♦

Indicates the current traffic load on the Switch. The
system load bar provides a quick reference of the current traffic load
relative to the capacity. It is a measure of the number of packets
traversing within the device. Only valid packet and transmit packet
are counted. The first six LED indicators are
indicators are

yellow

.

; the last two LED

green

14

Identifying External Components