D-Link DES-810 User manual

DES-810
DES-818
10/100 Fast Ethernet Switch
User’s Guide
Rev. 02 (Aug., 1997)
6DES810...02
Printed In Taiwan
RECYCLABLE

Wichtige Sicherheitshinweise
1. Bitte lesen Sie sich diese Hinweise sorgfältig durch.
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, sollten Sie es vom Stromnetz trennen. 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 Defektes aufweist.
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
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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 purchase from D-Link or its Authorized
Reseller:
Product Type Warranty Period
Managed Switch Three years*
Unmanaged Switch Lifetime*
*Power supply and fans in these devices One year
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.

D-Link Offices to Contact for Warranty Service:
To mail your Registration Card, or to obtain an RMA number or warranty service, see the following addresses:
In North, Central and South America:
D-Link Systems Inc.
5 Musick, Irvine CA 92618
Tel. [phone] Fax. [phone]
In Europe and Israel
D-Link Europe
D-Link House, 6 Garland Road, Stanmore, London HA7 1DP, U.K.
Tel. [phone] Fax. [phone]
In the Middle East (except Israel), Asia, Oceania and Africa:
D-Link Corporation
2F No. 233-2, Pao Chiao Road, Hsin Tien, Taipei, Taiwan
Tel. [phone] Fax. [phone]

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.
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 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.

10/100 Fast Ethernet Switch User’s Guide
Preface vii
T
ABLE OF
C
ONTENTS
PREFACE .........................................................................ix
Usage/Scope ............................................................................................. ix
Purpose.....................................................................................................ix
Audience...................................................................................................ix
Manual Organization ................................................................................ x
1 OVERVIEW.......................................................................1
Introduction...............................................................................................1
100Mbps Fast Ethernet Introduction.........................................................2
100BASE-TX Technology Overview..........................................................2
Cables and Connectors........................................................................................2
Topology.............................................................................................................3
Network...............................................................................................................3
Hubs....................................................................................................................4
Connectivity Rules..............................................................................................4
Switching Technology................................................................................5
Benefits of Switching..........................................................................................5
10/100 Switching Technology ............................................................................6
Product Features.......................................................................................6
Packing List...............................................................................................7
Front Panel................................................................................................8
Ports ....................................................................................................................8
LED Indicators..................................................................................................10
Rear Panel...............................................................................................11

viii Preface
Duplex Mode Switch.........................................................................................12
2 INSTALLATION ................................................................13
Installation Site........................................................................................13
Installing on a Desktop or Shelf ..............................................................14
Connecting Power ...................................................................................15
Network Connections...............................................................................15
10/100Mbps Ports.............................................................................................15
10Mbps Ports ....................................................................................................16
Cable Types.......................................................................................................16
Setting the Duplex Mode..........................................................................17
Network Configuration Examples............................................................18
LAN Microsegmentation...................................................................................19
Fast Ethernet Server Connection.......................................................................19
A SPECIFICATIONS ............................................................21
BCONNECTOR PINOUTS....................................................23
RJ-45 Connectors....................................................................................23
1

10/100 Fast Ethernet Switch User’s Guide
Preface ix
P
REFACE
Congratulations on your purchase of the 10/100 Fast Ethernet Switch. This
device integrates 100Mbps Fast Ethernet and 10Mbps Ethernet network
capabilities in a highly flexible desktop package.
Usage/Scope
This manual discusses two 10/100 Fast Ethernet Switch models (ten port and
eighteen port). Where necessary, the text distinguishes between them,
otherwise all information provided is applicable to either model. Please note
that figures throughout the manual depict the ten port model.
Purpose
This manual discusses how to install and use the 10/100 Fast Ethernet
Switch.
Audience
This manual is intended for network administrators with:
• Background in LAN bridge concepts.
• Understanding of IEEE 802.3 Ethernet and 100BASE-TX Fast Ethernet
networking concepts.

xPreface
• Understanding of how to install local area networks (LANs).
Manual Organization
Chapter 1 Overview
Describes the product, its features, packing list, and the front and rear panels.
Chapter 2 Installation
Provides detailed instructions on installing the 10/100 Fast Ethernet Switch.
Chapter 2 includes information on installation, connecting power, network
connections, setting the communications mode, and provides some network
configuration examples.
Appendix A Specifications
Lists the technical specifications of the product.
Appendix B Connector Pinouts
Describes the connector pinouts of the 10/100 Fast Ethernet Switch ports.

10/100 Fast Ethernet Switch User’s Guide
Overview 1
1
2 O
VERVIEW
Introduction
The DES-810 and DES-818 Fast Ethernet Switches are ideal for network
managers who want to boost workgroup performance easily by micro-
segmenting a 10Mbps LAN while adding 100Mbps links. They are also
excellently suited to provide dedicated Fast Ethernet connections to key
network servers.
Each switch integrates 100Mbps Fast Ethernet with 10Mbps Ethernet
networks seamlessly. The speed migration design will bridge high bandwidth
Fast Ethernet network segments to traditional 10Mbps Ethernet network
segments quickly and simply.
The 10/100 Fast Ethernet Switch complies with IEEE802.3u, 100BASE-TX,
IEEE802.3 and 10BASE-T standards. The DES-818 model has 16 10Mbps
twisted-pair ports and two 10/100Mbps N-Way twisted-pair ports. The DES-
810 has eight 10Mbps twisted-pair ports and two 10/100Mbps N-Way
twisted-pair ports. The 10/100 Fast Ethernet Switch provides a store-and-
forward passing scheme. Filtering and forwarding rates for the switch run at
wire-speed, reducing latency within and across segments.
The 10/100 Fast Ethernet Switch provides an easy, affordable, high-
performance, seamless, and standard-based migration path to a 100BASE-TX

2 Overview
LAN while preserving your initial investment and use of 10Mbps Ethernet
LANs.
100Mbps Fast Ethernet Introduction
Computers today have become increasingly powerful, with the capability to
accommodate very sophisticated uses such as multimedia applications,
video-conferencing, 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 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 100Mbps Fast Ethernet is
compatible with all 10Mbps Ethernet environments, it provides a straight-
forward upgrade without wasting the company’s existing investment in
hardware, software, and trained personnel.
100BASE-TX Technology Overview
Cables and Connectors
Category 5 unshielded twisted-pair (UTP) cables are supported. UTP
category 5 cable uses the same RJ-45 connector used with 10BASE-T, wired

10/100 Fast Ethernet Switch User’s Guide
Overview 3
in the same configuration. Please note that the punch-down blocks in the
wiring closet must also be Category 5 certified. If 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 through 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.

4 Overview
Hubs
Unlike 10BASE-T hubs which are all functionally identical, Fast Ethernet
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 hubs 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
• 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 (or hub stacks) 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.

10/100 Fast Ethernet Switch User’s Guide
Overview 5
Switching Technology
Switching is fast becoming the industry standard for pushing the limits of
existing Ethernet networks. A switch bridges Ethernet packets between
Ethernet and Fast Ethernet LAN segments at the MAC address level of the
Ethernet protocol.
The difference between switched Ethernet (10Mbps, 100Mbps, or both) and
traditional Ethernet is analogous to the difference between a private phone
line and a party line. With switched Ethernet, each workgroup has a “private
line” so that transmitted packets don’t have to wait as long to gain access to
the network. When connected to a switched port, each Ethernet segment has
full “wire-speed” access, so a switch effectively divides a single Ethernet
LAN into bridged multiple LAN segments. Each segment can support a
workgroup or even provide a dedicated connection for a key workstation or
server. The result of dividing an Ethernet LAN into multiple segments is a
multiplication of internal bandwidth available to all stations on the LAN and
a reduction in latency rates during peak-use periods.
Benefits of Switching
Ethernet switching technology drastically increases the total bandwidth of a
LAN. It also provides configuration flexibility to local workgroups which
allows the network administrator to better control how network resources are
distributed against network load. Switching helps reduce the congestion
problems inherent in the contention-oriented CSMA/CD protocol, thereby
improving network response during high utilization periods.
Also, currently popular distributed client/server applications often require
higher bandwidth and tighter client-to-server integration. Legacy 10Mbps
Ethernet often is unable to provide a sufficiently sophisticated platform for
users to be able to take full advantage of such client/server applications.
Fast Ethernet switching not only satisfies both technical and business needs,
it also preserves the current investment in the huge 10BASE-T Ethernet

6 Overview
installed base. Compatibility with 10Mbps Ethernet ensures that users will
be able to migrate to Fast Ethernet at a pace appropriate to their installation
and needs.
10/100 Switching Technology
An integral extension of Fast Ethernet, 10/100 switching provides not
only a 100Mbps high-speed connection for carrying aggregated 10Mbps
traffic, it also handles the necessary conversion of MAC between
10BASE-T and 100BASE-TX. Combining Fast Ethernet and switching
technologies provides both bandwidth for local workgroups and a high-
speed link to carry local traffic elsewhere in the network.
Product Features
The 10/100 Fast Ethernet Switch has the following key features:
MODEL PORTS (RJ-45)
DES-818 16 10Mbps; Two 10/100Mbps; One Uplink
DES-810 Eight 10Mbps; Two 10/100Mbps; One Uplink
• Full-duplex and half-duplex capability on all ports with each user-
configurable through the Duplex Mode Switch on the rear panel.
• Shared memory architecture.
• Dynamic buffer allocation to balance the network load and prevent
packet loss due to congestion.
• 8K active MAC address entry table per device, self-learning and table
aging.
• Auto polarity correction for all twisted pair ports.

10/100 Fast Ethernet Switch User’s Guide
Overview 7
• High-speed uplink port for connecting to a higher tier switch or other
device.
• Flexibility of application: from segmentation of a large LAN to client-
server maximization to dedicated connections for high-priority single
users.
• Support for IEEE 802.3, 10BASE-2, 10BASE-T, IEEE 802.3u and
100BASE-TX standards.
• Εxtensive LED indicators to facilitate troubleshooting and monitoring of
the product’s operating status.
•
••
• Fast store-and-forward passing scheme provides low latency and high
data integrity.
•
••
• Compatibility with standard Ethernet applications, internetworking
systems and client-side adapters to minimize infrastructure changes and
costs.
Packing List
Unpack the 10/100 Fast Ethernet Switch shipping carton and check for the
listed items below. If any items are missing or damaged, notify your
authorized reseller immediately.
• The 10/100 Fast Ethernet Switch
• This User's Guide
• An AC Power Cord
• Adhesive-backed Rubber Feet

8 Overview
Front Panel
The 10/100 Fast Ethernet Switch front panel includes network connectors
and LED indicators for ease-of-use.
Figure 1 10/100 Fast Ethernet Switch Front Panel
Ports
The product comes with twisted-pair ports. These ports can be used to
connect to individual stations in need of faster access, to segment heavily
utilized LANs, and/or to provide higher bandwidth access to a key server in a
client-server environment.
10Mbps Ports
The 10Mbps twisted-pair ports are standard RJ-45 connectors for use with
unshielded or shielded twisted-pair (UTP/STP) wiring. The 10Mbps ports
operate at an user-selectable speed of 10Mbps for half-duplex mode or
20Mbps for full-duplex mode. In either mode, the twisted-pair ports can
operate over 100 meters of Category 3, 4, or 5 UTP or STP cable.
Possible uses for the 10Mbps switch ports:
• Segment an existing LAN to improve bandwidth utilization.

10/100 Fast Ethernet Switch User’s Guide
Overview 9
• Connect single users either to provide power users with greater access
and thus speed, or multiple users for high bandwidth access to a shared
network server.
• Uplink connections for lower-tier switches.
10/100Mbps Ports
The 10/100Mbps twisted-pair ports are standard RJ-45 connectors for use
with unshielded or shielded twisted-pair (UTP/STP) wiring. These ports are
auto-negotiating between 10Mbps and 100Mbps, which means that they
detect the speed of devices connected to them and auto-configure to run at
that speed. The 10/100Mbps ports also operate in half-duplex mode or full-
duplex mode at either speed. In either duplex mode, the twisted-pair ports
can operate over 100 meters of Category 5 UTP or STP cable.
Possible uses for the 10/100Mbps switch ports:
• Add Fast Ethernet segments to an existing 10Mbps LAN.
• Provide a dedicated Fast Ethernet connection for a shared LAN server in
a 10Mbps LAN.
• Uplink to a higher-tier hub or switch.
Table 1-1: Port and Cable Specifications
Port Connector Half/Full
Duplex Cable
10Mbps RJ-45 10/20Mbps 100m, Category 3,4, or
5 UTP; or STP
10/100Mbps RJ-45 10/20Mbps
100/200Mbps 100m, Category 5 UTP or STP

10 Overview
Note: Full-duplex mode can only be used for
connections to other switches or to network
stations. Connections to hubs must use half-
duplex mode only.
Uplink Port
The uplink port is used for higher-tier connections to more advanced
switches or other network devices. Please note that if you are using the
uplink port, you will be unable to use port one as these two ports are
logically linked.
Note: A crossover cable must be used when connecting
from the uplink of another switch or a hub to the
uplink port on the 10/100 Fast Ethernet Switch.
LED Indicators
The 10/100 Fast Ethernet Switch has extensive LED indicators to facilitate
monitoring and troubleshooting. They include a Power LED and Status LEDs
for all ports. The Status LEDs have indicators that report on Link, Duplex,
Activity, Collision and 100Mbps states.
Figure 2 LED Indicators