D-Link DES-2108 User manual

DES-2108
8-port 10/100
Fast Ethernet Switch
User’s Guide

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.
VCCI Warning

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TABLE OF CONTENTS
About This Guide ................................................................................ 1
Terms ........................................................................................... 1
Overview of this User’s Guide .................................................... 1
Introduction.......................................................................................... 2
Fast Ethernet Technology ............................................................ 2
Switching Technology ................................................................. 2
Switch Description....................................................................... 3
Features........................................................................................ 4
Ports ............................................................................................. 5
Unpacking and Setup........................................................................... 6
Unpacking.................................................................................... 6
Setup ............................................................................................ 6
Installing the Switch on a Desktop .............................................. 7
Installing the Switch on a Rack ................................................... 8
Power on ...................................................................................... 9
Identifying External Components...................................................... 10
Front Panel Components............................................................ 10
Rear Panel .................................................................................. 11
LED Indicators........................................................................... 11
Power and CPU LEDs ............................................................... 12

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10/100M Fast Ethernet Ports Status LEDs ................................ 12
Introduction To Switch Management ................................................ 15
Management Options ................................................................. 15
Web Management Utility........................................................... 15
Web-based Management Interface............................................. 15
Command Line Interface (CLI) ................................................. 16
SNMP-Based Management........................................................ 16
Configuration The Switch.................................................................. 17
Web Management Utility........................................................... 17
Installing the Web Management Utility............................. 17
Discovery List.................................................................... 19
Monitor List ....................................................................... 19
Device Setting.................................................................... 21
Toolbar............................................................................... 23
Configuring the Switch using Web Browser ............................. 24
Login to Web Manager ...................................................... 25
Setup Menu ........................................................................ 27
Configuring Setup Setting.................................................. 28
VLAN Settings (Virtual Local Area Network).................. 29
Mirror Setting .................................................................... 32
Spanning Tree Setting........................................................ 33
SNMP Setting .................................................................... 35

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Static MAC ........................................................................ 40
IGMP Snooping Setting..................................................... 42
Storm Control..................................................................... 43
Device Status ..................................................................... 44
Statistic............................................................................... 45
System Setting ................................................................... 46
Trap Setting........................................................................ 47
Set Password ...................................................................... 48
Backup Setting................................................................... 48
Reset Setting ...................................................................... 49
System Reboot ................................................................... 49
Logout................................................................................ 50
Configuring the Switch using the CLI ....................................... 51
IP Address of the Switch.................................................... 51
Using the CLI via Telnet interface..................................... 52
Command Syntax............................................................... 53
Basic Switch Commands ................................................... 55
Basic IP Commands........................................................... 62
Switch Port Commands...................................................... 64
VLAN Commands ............................................................. 67
Port Mirroring Commands................................................. 75
Trap Commands................................................................. 78

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Spanning Tree Commands................................................. 84
SNMP Commands ............................................................. 90
IGMP Snooping Commands .............................................. 97
Static MAC Commands ................................................... 102
Technical Specifications .................................................................. 110
Warranty and Registration Information ........................................... 112

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ABOUT THIS GUIDE
This user’s guide tells you how to install your DES-2108, how to
connect it to your network.
Terms
For simplicity, this documentation uses the terms “Switch” (first letter
upper case) to refer to the DES-2108, and “switch” (first letter lower
case) to refer to all Ethernet switches, including the DES-2108.
Overview of this User’s Guide
Introduction Describes the Switch and its features.
Unpacking and
Setup Helps you get started with the basic
installation of the Switch.
Identifying
External
Components
Describes the front panel, rear panel, and
LED indicators of the Switch.
Configuration
the Switch Tell to how to configuration the
management functions of the Switch.
Technical
Specification Lists the technical specifications of the
Switch.

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INTRODUCTION
This section describes the features of the DES-2108, as well as giving
some background information about Fast Ethernet and Switching
technology.
Fast Ethernet Technology
The growing importance of LANs 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 10BASE-T technology.
100Mbps Fast Ethernet is a 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 Carrier Sense Multiple Access with Collision
Detection (CSMA/CD) Ethernet protocol.
Switching Technology
Another key development pushing the limits of Ethernet technology is
in the field 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 segments, which are not
competing with each other for network transmission capacity, and
therefore decreasing the load on each segment. The Switch acts as a
high-speed selective bridge between the individual segments. Traffic

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that needs to go from one segment to another (from one port to
another) is automatically forwarded by the Switch, without interfering
with any other segments (ports). This allows the total network
capacity to be multiplied, while still maintaining the same network
cabling and adapter cards. For Fast Ethernet or Gigabit 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, for
example, 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 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.
Switch Description
The DES-2108 is equipped with unshielded twisted-pair (UTP) cable
ports providing dedicated 10 or 100 Mbps bandwidth. The Switch has
8 UTP ports and Auto MDI-X/MDI-II convertible ports that can be
used for up-linking to another switch. These ports can be used for
connecting PCs, printers, servers, hubs, routers, switches and other
networking devices. The dual speed ports use standard twisted-pair
cabling and are ideal for segmenting networks into small, connected
sub-networks for superior performance. Each 10/100 port can support
up to 200 Mbps of throughput in full-duplex mode. This stand-alone
Switch enables the network to use some of the most demanding
multimedia and imaging applications concurrently with other user

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applications without creating bottlenecks. The built-in Light-
Management engine can be configure the Switch's settings for priority
queuing, VLANs, and port monitoring, and port speed.
Features
The DES-2108 was designed for easy installation and high
performance in an environment where traffic on the network and the
number of users increase continuously.
The Switch features include:
 IEEE 802.3 10BASE-T compliant.
 IEEE 802.3u 100BASE-TX compliant.
 IEEE 802.3x flow control in full duplex mode.
 IEEE 802.1Q VLAN & Port_based VLAN.
 IEEE 802.1D Spanning Tree.
 Port_based QoS.
 System Log Support.
 High performance switching engine performs forwarding and
filtering at full wire speed.
 Full- & Half- duplex operation for both of 10Mbps and
100Mbps and connections. Full duplex allows the switch port
to simultaneously transmit and receive data. It only works
with connections to full-duplex-capable end stations and
switches.
 Non-blocking store and forward switching scheme capability
to support rate adaptation and protocol conversion.
 Efficient self-learning and address recognition mechanism
enables forwarding rate at wire speed.
 Support port-based enable and disable.
 Address table: Supports up to 4K MAC addresses per device.

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 Supports a packet buffer of up to 256 Kbytes.
 IGMP Snooping support.
 SNMP support.
 Port Mirror support.
 MIB support for:
 RFC1213 MIB II.
 Private MIB.
 Provides parallel LED display for port status such as link/act,
speed, etc.
Ports
Eight (8) 10/100Mbps 100BASE-TX (Auto MDI-X/MDI-II) ports for
connecting to end stations, servers, hubs and other networking devices.
All UTP ports can auto-negotiate between 10Mbps and 100Mbps,
half-duplex and full duplex, and flow control.

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UNPACKING AND SETUP
This chapter provides unpacking and setup information for the Switch.
Unpacking
Open the shipping carton of the Switch and carefully unpack its
contents. The carton should contain the following items:
 One DES-2108 Fast Ethernet Switch
 Four rubber feet with adhesive backing
 One AC power cord
 Mounting kit (two brackets and screws)
 CD-ROM (This User’s Guide and Utility)
If any item is found missing or damaged, please contact your local
reseller for replacement.
Setup
The setup of the Switch can be performed using the following steps:
 Install the Switch on a sturdy, level surface that can support
at least 6.6 lb. (3 kg) of weight. Do not place heavy objects
on the Switch.
 The power outlet should be within 1.82 meters (6 feet) of the
device.
 Visually inspect the power cord and see that it is fully
secured to the AC power port.
 Make sure that there is proper heat dissipation from and
adequate ventilation around the Switch. Leave at least 10 cm
(4 inches) of space at the front and rear of the Switch for
ventilation

 Install the Switch in a fairly cool and dry place 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.
When installing the Switch on a level surface, attach the rubber feet to
the bottom of the device. The rubber feet cushion the Switch, protect
the casing from scratches and prevent it from scratching other
surfaces.
Installing the Switch on a Desktop
When installing the Switch on a desktop or shelf, the rubber feet
included with the Switch should first be attached. Attach these
cushioning feet on the bottom at each corner of the device. Allow
enough ventilation space between the Switch and any other objects in
the vicinity.
Figure 1. Installed on a Desktop
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Installing the Switch on a Rack
The Switch can be mounted in a standard 19" rack. Use the following
diagrams to guide you.
Figure 2. Fasten mounting brackets to Switch
Fasten the mounting brackets to the Switch using the screws provided.
With the brackets attached securely, you can mount the Switch in a
standard rack as shown in Figure 2-2 on the following page.
Mounting the Switch in a Standard 19" Rack:
Figure 3. Installing Switch in a rack
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Power on
The DES-2108 can be used with AC power sources 100 - 240 VAC,
50 - 60 Hz. The Switch’s power supply will adjust to the local power
source automatically.
Plug one end of the AC power cord into the power connector of the
Switch and the other end into the local power source outlet.
After the Switch is powered on, the LED indicators will momentarily
blink. This blinking of the LED indicators represents a reset of the
system

IDENTIFYING EXTERNAL COMPONENTS
This chapter describes the front panel, rear panel and LED indicators
of the Switch
Front Panel Components
The front panel of the Switch consists of eight (8) 10/100Mbps Fast
Ethernet ports, LED indicators and Reset button.
Figure 4. Front panel view
RJ-45: Eight 10/100Mbps Fast Ethernet ports.
LED Indicators: Comprehensive LED indicators that display the
conditions of the Switch and status of the network. A description of
these LED indicators follows (see LED Indicators).
Reset: The Reset button is to reset all the setting back to the factory
default.
Note: Be sure that you recorded the setting of your device, else all
the setting will be erased when pressing the “Reset” button.
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Rear Panel
The rear panel of the Switch contains an AC power connector.
Figure 5. Rear panel view
The AC power connector is a standard three-pronged connector that
supports the power cord. Plug-in the female connector of the provided
power cord into this socket, and the male side of the cord into a power
outlet. The Switch automatically adjusts its power setting to any
supply voltage in the range from 100 ~ 240 VAC at 50 ~ 60 Hz.
LED Indicators
The LED indicators of the Switch include Power, CPU and Port
Status LEDs. The following shows the LED indicators for the Switch
along with an explanation of each indicator.
Figure 6. LED indicators
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Power and CPU LEDs
Power
On :
This LED will light green after the Switch is powered on to
indicate the ready state of the device.
Off :
When the switch powered off or the power cord has improper
connection.
CPU
Blinking :
When the CPU is working, the CPU LED is blinking.
On/Off :
The CPU is not working.
10/100M Fast Ethernet Ports Status LEDs
Link/Act
On :
When the Link/Act LED lights on, the respective port is
successfully connected to an Ethernet network.
Blinking : When the Link/Act LED is blinking, the port is transmitting or
receiving data on the Ethernet network.
Off :
No link.
100M
On :
When the 100Mbps LED lights on, the respective port is
connected to a 100Mbps Fast Ethernet network.
Off :
When the respective port is connected to a 10Mbps Ethernet
network

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INTRODUCTION TO SWITCH MANAGEMENT
 Management Options
 Web Management Utility
 Web-based Management Interface
 Command Line Interface (CLI)
 SNMP-Based Management Managing
Management Options
This system may be managed in-band using TCP/IP Telnet protocol
and web-based management, accessible through a web browser.
Web Management Utility
With the Web Management Utility, you can easily discover all the
Web Management Switch, assign the IP Address, changing the
password and upgrading the new firmware.
Web-based Management Interface
After you have successfully installed the Switch, you can configure
the Switch, display statistics using a web browser, such as Netscape
Navigator (version 6.2 and higher) or Microsoft® Internet Explorer
(version 5.0).

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Command Line Interface (CLI)
The Switch supports a Command Line Interface (CLI) that allows the
user to connect to the Switch’s management agent using the TCP/IP
Telnet protocol.
SNMP-Based Management
You can manage the Switch with an SNMP-compatible console
program. The Switch supports SNMP version 1.0. The SNMP agent
decodes the incoming SNMP messages and responds to requests with
MIB objects stored in the database. The SNMP agent updates the MIB
objects to generate statistics and counters.