D-Link 1016T - DGS Switch User manual

D-Link®DGS-1016T
DGS-1024T
16/24-Port 10/100/1000Mbps
Gigabit Ethernet Switch
Manual
Building Networks for People
RECYCLABLE
(July 2009)

D-Link DGS-1016T/DGS-1024TUnmanaged GigabitEthernetSwitch
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Informationin this document is subject to change without notice.
© 2009 D-LinkCorporation. All rights reserved.
Reproduction in any manner whatsoever without the written permission ofD-Link Corporation is strictly
forbidden.
Trademarks used in this text: D-Link and the D-LINK logo are trademarks of D-Link Corporation;
Microsoft andWindows areregistered trademarks ofMicrosoft Corporation.
Other trademarks and tradenames may be used in this document to refer to eithertheentities claiming the
marks and names or their products. D-Link Corporation disclaims any proprietary interest in trademarks
and trade names otherthan its own.
FCC Warning
This equipment has been tested and found to comply with thelimits for a Class A digital device,pursuant
to Part 15 of the FCC Rules. These limits are designed to provide reasonable protection against harmful
interferencewhen theequipment is operated in acommercial environment. This equipment generates,uses,
and can radiateradio frequency energy and, ifnot installed and used in accordancewith 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
interferenceat his own expense.
CEMark Warning
This is aClass A product. In a domestic environment, this product may cause radio interference in which
casetheusermay be required to takeadequatemeasures.
Warnung!
Dies ist ein Produkt der Klasse A. ImWohnbereich kann dieses Produkt Funkstoerungen verursachen. In
diesemFall kann vomBenutzerverlangt werden,angemesseneMassnahmen zu ergreifen.
Pre caución!
Este es un producto de Clase A. En un entorno doméstico, puede causar interferencias de radio, en cuyo
case,puede requerirse al usuario para queadoptelas medidas adecuadas.
Attention!
Ceci est un produit de classe A. Dans un environnement domestique, ce produit pourrait causer des
interférences radio,auquel cas l`utilisateur devrait prendreles mesures adéquates.
Attenzione!
Il presente prodotto appartiene alla classe A. Se utilizzato in ambiente domestico il prodotto può causare
interferenze radio,nel cui caso èpossibilechel`utente debba assumereprovvedimenti adeguati.
VCCI Warning

CONTENTS
PREFACE IV
NO TES ,NO TIC ES ,AND CAUTIONS...................................................................IV
SAFETY INSTRUCTIONS.......................................................................................V
Safety Cautions..............................................................................................v
General Precautions for Rack-Mountable Products............................vii
Protecting Against Electrostatic Discharge............................................ix
INTRODUCTION 10
SW ITCH DESC RIPTIO N .......................................................................................10
Switch Features...........................................................................................11
Gigabit Ethernet Technology....................................................................12
802.1P and QoS..........................................................................................13
D-LINK GR EEN ETH ERNET TECHNOLOGY...................................................14
FRONT-PANEL CO MPONENTS ...........................................................................16
LED Indicators............................................................................................16
Cable diagnostics........................................................................................17
POW ER INPUTONREAR PANEL.......................................................................19
INSTALLATION 20
Package Contents.......................................................................................20
BEFO RE YOU CONNEC T TO THE NETWO RK..................................................21
Mounting the Switch on a Rack................................................................22
Attaching the Rubber Feet.........................................................................23
Provide forAdequate Ventilation.............................................................23
POW ER ON............................................................................................................24
Power Failure..............................................................................................24
CONNECTING THE SWITCH 25
Connect to End Node..................................................................................26
Connect to Hub or Switch.........................................................................27
Connect to Network Backbone or Server................................................28
TECHNICALSPECIFICATIONS 29
GLOSSARY 31

D-Link DGS-1016T/DGS-1024TUnmanaged GigabitEthernetSwitch
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Preface
The DGS-1016T/DGS-1024T Manual is divided into sections that describe the system
installation and operatinginstructions with examples.
Section 1, Introduction - A description of the physical features of the Switch,
includingLED indicators, ports and panel descriptions.
Section 2, Installation – A description of the physical installation of the Switch,
mounting the Switch in a equipment rack and poweringonthe Switch.
Section 3, Connecting the Switch – A description of how to connect your Switch to
an end node, hub, another switch or backbone server.
Appendix Technical Specifications - The technical specifications of the
DGS-1016T/DGS-1024T.
.
Notes, Notices, and Cautions
NOTE: A NOTE indicates important information
that helps you make better use of your device.
NOTICE: A NOTICE indicates either potential
damage to hardware or loss of data and tells you
how to avoid the problem.
CAUTION: A CAUTION indicates the potential for
property damage, personal injury or death.

D-Link DGS-1016T/DGS-1024TUnmanaged GigabitEthernetSwitch
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Safety Instructions
Use the following safety guidelines to ensure your own personal safety and to help protect your system
from potential damage. Throughout this safety section,thecaution icon ( )is used to indicatecautions
and precautions that you need to review and follow.
Safety Cautions
To reduce the risk of bodily injury, electrical shock, fire, and damage to the equipment,
observesthefollowingprecautions.
Observeand followservicemarkings. Do not serviceanyproduct except as explainedin your
system documentation. Opening or removing covers that are marked with the triangular
symbol with a lightning bolt may expose you to an electrical shock. Only atrained service
technician should service components inside thesecompartments.
If any of the following conditions occur, unplug the product from the electrical outlet and
replacethe part or contact your trained serviceprovider:
– The power cable, extension cable, or plug is damaged.
– An object has fallen into the product.
– The product has been exposedto water.
– The product has been dropped or damaged.
–The product does not operate correctly when you follow the operating
instructions.
•Keep your system away from radiators and heat sources. Also, do not block cooling
vents.
•Do not place any deviceon topof Switch, orplace the Switchon topof any device or
object that will block the free flow of air through the ventilation slots on the sides, top,
and bottom of the Switch’s case.
•Keep your hand away from top and bottom of device that generates a significant
amount of heat.
•Do not spill food or liquids on your system components, and never operate the product
in a wet environment. If the syst em gets wet, see the appropriate section in your
troubleshooting guide or contact your trained service provider.
•Donot push any objects into theopenings of your system. Doing so can cause a fireor
an electric shock by shorting out interior components.
•Use the product only with approved equipment.
•Allowthe product to cool before removing covers or touching internal components.

D-Link DGS-1016T/DGS-1024TUnmanaged GigabitEthernetSwitch
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Safety Instructions (continued)
•Operate the product only from the type of external power source indicated on the
electrical ratings label. If you are not sure of the type of power source required, consult
yourserviceprovider orlocalpowercompany.
•To help avoid damaging your system, be sure the voltage selection Switch (if provided)
onthepowersupply is set tomatch thepoweravailableat your location:
– 115 volts (V)/60 hertz (Hz) in most of North and South America and some Far
Eastern countriessuch as South Korea andTaiwan
– 100 V/50 Hz in eastern Japan and 100 V/60 Hz in western Japan.
– 230 V/50 Hz inmost ofEurope,theMiddle East, andthe Far East.
•Also be sure that attached devices are electrically rated to operate with the power
available in your location.
•Use only approvedpower cable(s). If you have not been provided with a power cable
for your system or for any AC-powered option intended for your system, purchase a
power cablethat is approved for use in your country. Thepower cablemust beratedfor
the product and for the voltage and current marked on the product's electrical ratings
label. The voltage and current rating of the cable should be greater than the ratings
markedon theproduct.
•To help prevent an electric shock, plug the system and peripheral power cables into
properly grounded electrical outlets. These cables are equipped with three-prong plugs
to help ensure proper grounding. Do not use adapter plugs or remove the grounding
prongfrom a cable. If youmust use an extension cable, use a 3-wire cable with properly
grounded plugs.
•Observe extension cable and power strip ratings. Make sure that thetotalampere rating
of all products plugged into the extension cable or power strip does not exceed 80
percent of theampereratings limit fortheextension cableorpowerstrip.
•To help protect your system from sudden, transient increasesand decreases in electrical
power, use a surge suppressor, line conditioner, or uninterruptible power supply (UPS).
•Position system cables and power cables carefully; route cables so that they cannot be
stepped on or tripped over. Be surethat nothing rests on any cables.
•Do not modify power cables or plugs. Consult a licensed electrician or your power
company for site modifications. Always follow your local/national wiringrules.
•When connecting or disconnecting power to hot-pluggable power supplies, if offered
withyour system,observethefollowing guidelines:
– Installthepowersupply beforeconnectingthepower cableto thepower supply.
– Unplug the power cable before removingthe power supply.
– Ifthe system hasmultiple sources of power, disconnect power from the system
by unplugging all power cables from the power supplies.

D-Link DGS-1016T/DGS-1024TUnmanaged GigabitEthernetSwitch
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Safety Instructions (continued)
•Move products with care; ensure that all casters and/or stabilizers are firmly connected
to the system.Avoid sudden stopsand uneven surfaces.
General Precautions for
Rack-Mountable Products
•Observethe following precautions for rack stability and safety. Also refer to the rack
installation documentation accompanying the system and the rack for specific caution
statements and procedures.
•Systems are considered to be components in a rack. Thus, "component" refers to any
systemas well astovarious peripheralsor supporting hardware.
CAUTION:
Installingsystems in a rackwithoutthe frontand
side stabilizers installed could cause the rack to tip over,
potentially resulting in
bodily injury under certain
circumstances. Therefore, always install the stabilizers
before installing components in the rack.
After installing system/components in a rack, never pull
more than one component out of the rack on its slide
assemblies at one
time. The weight of more than one
extended component could cause the rack to tip over and
mayresultinserious injury.
•Before working on the rack, make sure that the stabilizers are secured to the rack,
extended to the floor, and that the full weight of the rack rests on the floor.Install front
and side stabilizers on a single rack or front stabilizers for joined multiple racks before
working on therack.

D-Link DGS-1016T/DGS-1024TUnmanaged GigabitEthernetSwitch
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Safety Instructions (continued)
•Always load the rack from the bottom up, and load the heaviest item in the rack first.
•Make surethat the rack is level and stable before extending a component fromthe rack.
•Use caution when pressing the component rail release latches and sliding a component
intoorout ofa rack;the sliderailscanpinchyourfingers.
•After a component is inserted into the rack, carefully extend the rail into a locking
position,andthen slidethecomponent into therack.
•Do not overloadthe AC supply branch circuit that provides powerto the rack.Thetotal
rack load should not exceed 80 percent of the branch circuit rating.
•Ensurethat proper airflow is provided to components in the rack.
•Do not step on or standon any component when servicing other components in a rack.
CAUTION:
Never defeat the ground conductor or operate
the
equipment in the absence of a suitably installed ground
conductor. Contact the appropriate electrical inspection
authority or an electrician if you are uncertain that suitable
grounding is available.
CAUTION: The system chassis mustbe positivelygrounded
to the rack cabinet frame. Do not attempt to connect power
to the system until grounding cables are connected.
Completed power and safety ground wiring must be
inspected by a qualified electrical inspector. An energy
hazard will exist if the safety gro
und cable is omitted or
disconnected.

D-Link DGS-1016T/DGS-1024TUnmanaged GigabitEthernetSwitch
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Protecting Against Electrostatic Discharge
Static electricity can harm delicate components inside your system.To prevent static damage,
discharge static electricity from your body beforeyoutouch any of the electronic components,
such as the microprocessor. You can do so by periodically touching an unpainted metal
surface on thechassis.
You can alsotake thefollowing stepsto prevent damage from electrostatic discharge (ESD):
1. When unpacking a static-sensitive component from its shipping carton, do not
remove the component from the antistatic packing material until youare ready to
installthecomponent in your system. Just before unwrappingtheantistatic
packaging, be sureto discharge static electricity from your body.
2. When transporting a sensitive component,first place it in an antistatic containeror
packaging.
3. Handle all sensitive components in a static-safe area. If possible, use antistatic
floor pads, workbench pads, and an antistatic grounding strap.

10
SECTION 1
Introduction
Switch Description
Switch Features
D-Link Green Ethernet Technology
Ports
Front-Panel Components
LED Indicators
Power Input on Rear Panel
Switch Description
The 16-port DGS-1016T and 24-port DGS-1024T Switches provide dedicated
10, 100 or 1000 Mbps Ethernet bandwidth on each port. The ports will
automatically detect the speed, duplex and MDI/MDIX status of the device it
is connecting to,and adjust these settings accordingly.The Switch ports can be
used to network computers, printers, servers, routers, other switches or any
device equipped with an Ethernet port. For best performance, use Category 5
orbetterEthernet cabling.
This stand-alone Switch is very easy to set up, there is no network
management required. Just power on the Switch and connect the cables. Keep
in mind however that the standard rules of Ethernet regarding cable length
apply to this and all Ethernet devices. The length ofan Ethernet cable fromone
device to another cannot exceed 100 meters (or 300feet).

11
Switch Features
The DGS-1016T 16-Port and DGS-1024T 24-port Switches do not require any
management. Both Switches are designed for easy installation, flexibility and
high performance. Connect devices to the Switch as the scale and volume of
network traffic increases.
•Sixteen (DGS-1016T) ortwenty-four (DGS-1024T)
10/100/1000Mbps Ethernet ports
•Cable diagnostics function at Switch boot up
•D-Link Green Ethernet Technology
•Auto-Negotiation for10/100/1000Mbps and duplex mode
•Auto-MDI/MDI-X foreach port
•Supports Full/Half-duplextransfer mode for 10and 100Mbps
•Supports Full-duplextransfer mode for 1000Mbps
•Fullwire speed reception and transmission
•Store-and-Forward Switching method
•Supports 8Kabsolute MACaddresses
•Supports 512KB RAM for data buffering
•Easy to read diagnostic LEDs
•IEEE 802.3x flowcontrol for Full-duplex
•Back pressure flowcontrol for Half-duplex
•IEEE 802.1p QoSsupport (4 Queues,Strict Mode)
•Jumbo Frame support (9600Bytes)

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Gigabit EthernetTechnology
Gigabit Ethernet is an extension of IEEE 802.3 Ethernet utilizing the same
packet structure, format, and support for CSMA/CD protocol, full duplex, flow
control, and management objects, but with a tenfold increase in theoretical
throughput over 100-Mbps Fast Ethernet and a hundredfold increase over
10-Mbps Ethernet. Since it is compatible with all 10-Mbps and 100-M bp s
Ethernet environments, Gigabit Ethernet provides a straightforward upgrade
without wasting a company’s existing investment in hardware, software and
trained personnel.
The increased speed and extra bandwidth offered by Gigabit Ethernet is
essential to coping with the network bottlenecks that frequently develop as
computers and their bus speeds get faster and more users use applications that
generate more traffic. Upgrading key components, such as your backbone and
servers to Gigabit Ethernet can greatly improve network response times as well
as significantly speed up the traffic between your subnets.
Gigabit Ethernet supports video conferencing, complex imaging and similar
data-intensive applications. Likewise, since data transfers occur 10 times faster
than Fast Ethernet, servers outfitted with Gigabit Ethernet NIC’s are able to
perform10times the numberofoperations in the same amount oftime.

13
802.1P and QoS
The DGS-1024T and DGS-1016T Switches support 802.1p priority queuing
Quality of Service. The implementation of QoS (Quality of Service) and
benefits ofusing 802.1p priority queuing are described here.
Advantages of QoS
QoS is an implementation of the IEEE 802.1p standard that allows network
administrators a method of reserving bandwidth for important functions that
require a large bandwidth or have a high priority, such as VoIP (voice-over
Internet Protocol), web browsing applications,file serverapplications orvideo
conferencing. Not only can a larger bandwidth be created, but other less
critical traffic can be limited, so bandwidth can be saved. The Switch has
separate hardware queues on every physical port to which packets from
various applications are mapped to and assigned a priority. The illustration
below shows how 802.1P priority queuing is implemented on the Switch. The
eight IEEE 802.1P priority levels defined by the standard are mapped to the
fourclass queues used in the Switch.
Mapping QoS on the Switch
The picture above shows the default priority setting forthe Switch. Class-3 has
the highest priority of the four priority queues on the Switch. In order to
implement QoS, the user is required to instruct the Switch to examine the

14
header of a packet to see if it has the proper identifying tag tagged. Then the
user may forward these tagged packets to designated queues on the Switch
where they willbe emptied,based on priority.
Untagged packets will be treated as priority 0 (i.e. class 1).
Understanding QoS
The Switch has fourpriority queues.These priority queues are labeled as 3, the
high queue to 0, the lowest queue. The eight priority tags, specified in IEEE
802.1p are mapped to the Switch's priority tags as follows:
•Priority 0 is assigned to the Switch's Q1 queue.
•Priority 1 is assigned to the Switch's Q0 queue.
•Priority 2 is assigned to the Switch's Q0 queue.
•Priority 3 is assigned to the Switch's Q1 queue.
•Priority 4 is assigned to the Switch's Q2 queue.
•Priority 5 is assigned to the Switch's Q2 queue.
•Priority 6 is assigned to the Switch's Q3 queue.
•Priority 7 is assigned to the Switch's Q3 queue.
The Switch uses strict priority for Scheduling. Strict priority-based scheduling,
any packets residing in the higherpriority queues are transmitted first.
D-Link Green Ethernet Technology
D-Link Green Ethernet implements specialpower-saving features underspeed
at 1000Mbps that detect cable length and link status and adjust powerusage
accordingly.
Green Ethernet Technology saves energy in two specific ways:
Method 1: If there is no link on a port,such as when there is no computer
connected to the port orthe connected computeris powered off, Green
Ethernet Technology will entera "sleep mode",drastically reducing power
used forthat port.

15
Method 2: D-Link Green Ethernet detects the length of connected Ethernet
cable and adjusts power usage accordingly without affecting performance.
This way,a port connected to a 10m cable only uses as much poweras it needs,
instead ofusing full power, which is only needed for 100m cables.

16
Front-Panel Components
Note: The Switch illustrations used for this manual depict only the model
DGS-1016TSwitch.
On the front panelofthe Switch you will see the following.
•LEDstatus indicators
•16 Auto-Negotiating 10/100/1000Mbps ports on the DGS-1016T
•24 Auto-Negotiating 10/100/1000Mbps ports on the DGS-1024T
Front Panel View of the Switches
LED Indicators
The LED indicators of the Switch include a Power status indicator, one
Link/Act indicator for each port as well as one speed 100/1000Mbps indicator
for each port. When the Switch is powered on or restarted, it initiates a
diagnostic function as part of the boot up process. The speed indicators are
also used to display cable diagnostics information when the Switch boots up.
LED Indicators

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Cable Diagnostics
Upon booting up the Switch, a Cable Diagnostics is used to detect two
problems that may prevent successful connection. This feature operates only
on ports that are connected to 1000Mbps devices. If there are problems on a
port connected to a Gigabit Ethernet device (1000Mbps), try restarting the
Switch and watch the speed (100/1000Mbps) LED indicators to determine is
the problem is a fault in the cable or connecting hardware. For ports operating
at 10 or 100Mbps, the LED indicators can be used for less specific
troubleshooting.
The faults detected by the cable diagnostics for 1000Mbps operation are as
follows:
•Open circuit - a lack of continuity between the pins at each end of the
Ethernet cable or a disconnected cable.
•Short circuit - two or more conductors short-circuited.
During the diagnostic, each port is scanned to determine if the Ethernet cable
and connectors is in good working order. During the diagnostic process the
speed LED for each port blinks green in sequential order. This port scan takes
about 3 seconds. If a cable fault is detected, the corresponding port’s speed
LED will light amber for 5 seconds. The Switch is then reset for normal
operation. It takes about 2 seconds for the Switch to reset. The entire Cable
diagnostics process takes about 10 seconds from the time the Switch is
powered on.
The table below summarizes Cable diagnostics information.
NOTE: the cable diagnostics function does not
detect the length of Ethernet cabling. Remember
that the length of cabling between two Ethernet
devices may not exceed 100 meters (or 300 feet).

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LED Indicator Description
Power This lights green while the Switch is
receiving power.
Link/Act A steady green light indicates the
corresponding port is connected and a valid
link is established. This will blink green
when there is activity on the port.
100Mbps/1000Mbps The speed indicator will light green if the
corresponding port is connected and
operating at 1000Mbps. An amber light
indicates the port is operating at 100Mbps.
If the port is connected (as indicated by the
Link/Act indicator) and the speed indicator
does not light, the port is operating at
10Mbps.
Cable Diagnostics
(during boot up only) Open or short circuit −100/1000Mbps LED
blinks amber for 5 seconds

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Rear panel view of the Switch
Power Input on Rear Panel
The powercable connection is located on the rear panelofthe Switch.
Switch power input is provided by and internal universal power supply
(100-240VAC : 12V/3.3A).
The AC power connector is a standard three-pronged connector that
supports the power cord. Please see the Power On section below for
instructions on howto properly connect the Switch to a powersource.

20
SECTION 2
Installation
Package Contents
Before You Connect to the Network
Installing the Switch
Power On
Package Contents
Open the shipping carton of the Switch and carefully unpack its contents. The
carton should contain the following items:
•One DGS-1016T 16-Port/DGS-1024T 24-Port
10/100/1000BASE-T Gigabit Ethernet Switch
•Fourrubberfeet with adhesive backing
•One power Cord
•Mounting ears forrack-mounting
•CD-ROM with product documentation
If any item is found missing or damaged, please contact your local D-Link
reseller for replacement.