D-Link DGS-1248T - Switch User manual

DGS-1248T
48-Port 10/100/1000 Mbps
with 4 Combo Mini GBIC
Gigabit Smart Switch
User Manual
V1.01

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TABLE OF CONTENTS
About This Guide.................................................................................1
Purpose ............................................................................................1
Terms/Usage....................................................................................1
Introduction..........................................................................................2
Gigabit Ethernet Technology...........................................................2
Fast Ethernet Technology................................................................3
Switching Technology.....................................................................3
Features............................................................................................4
Technical Specifications..................................................................5
Unpacking and Installation..................................................................9
Unpacking........................................................................................9
Installation .......................................................................................9
Rack Mounting...........................................................................10
Connecting Network Cable........................................................11
AC Power...................................................................................12
Identifying External Components......................................................13
Front Panel.....................................................................................13
Rear Panel......................................................................................14
Understanding LED Indicators ......................................................15
Power and System LEDs ...............................................................15
Configuration.....................................................................................18
Supported web browsers................................................................18
Installing the SmartConsole Utility................................................18

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SmartConsole Utility Features.......................................................19
Menu Toolbar.............................................................................19
Discovery List............................................................................21
Monitor List...............................................................................22
Device Setting............................................................................24
Web-based Utility..........................................................................26
Login..........................................................................................26
Tool Menu..................................................................................28
Setup Menu....................................................................................29
System > System Setting ...........................................................30
System > Trap Setting................................................................31
System > Port Setting.................................................................32
System > SNMP Setting ............................................................34
System > Password Access Control...........................................36
Configuration > 802.1Q VLAN.................................................36
Configuration > Trunking..........................................................39
Configuration > IGMP Snooping...............................................40
Configuration > 802.1D Spanning Tree.....................................44
Configuration > Port Mirroring..................................................46
QoS > 802.1p Default Priority...................................................47
Security > Safeguard Engine......................................................48
Security > Broadcast Storm Control..........................................48
Security > 802.1X Setting..........................................................48
Security > Mac Address Table > Static MAC............................51
Security > Mac Address Table > Dynamic Forwarding Table ..52

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Monitoring > Statistics...............................................................53

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ABOUT THIS GUIDE
Thank you and congratulations on your purchase of the DGS-1248T
48-Port 10/100/1000 Mbps with 4 Combo Mini GBIC Gigabit Smart
Switch. This device integrates 1000Mbps Gigabit Ethernet, 100Mbps
Fast Ethernet and 10Mbps Ethernet network capabilities in a highly
flexible package.
Purpose
This guide will show you how to install and use the configuration
functions of the DGS-1248T Web-Smart Switch step-by-step.
Terms/Usage
In this guide, the term “Switch” (first letter capitalized) refers to the
DGS-1248T Smart Switch, and “switch” (first letter lower case) refers
to other Ethernet switches. Some technologies refer to terms “switch”,
“bridge” and “switching hubs” interchangeably, and both are
commonly accepted for Ethernet switches.

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INTRODUCTION
This chapter will describe the features of the DGS-1248T and provide
some background information about Ethernet/Fast Ethernet/Gigabit
Ethernet switching technology.
Gigabit Ethernet Technology
Gigabit Ethernet is an extension of IEEE 802.3 Ethernet utilizing the
same packet structure, format, and support for CSMA/CD protocol,
full duplex, and management objects, but with a tenfold increase in
theoretical throughput of over 100-Mbps Fast Ethernet and a
hundredfold increase over 10-Mbps Ethernet. Since it is compatible
with all 10-Mbps and 100-Mbps Ethernet environments, Gigabit
Ethernet provides a straightforward upgrade without wasting existing
investments in hardware, software, or trained personnel.
The increased speed and extra bandwidth offered by Gigabit Ethernet
is essential to help solving network bottlenecks that frequently
develop as more advanced computer users and newer applications
continue to demand greater network resources. Upgrading key
components, such as backbone connections and servers to Gigabit
Ethernet technology can greatly improve network response times as
well as significantly speed up the traffic between subnets.
Gigabit Ethernet enables fast optical fiber connections to support
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
perform 10 times the number of operations in the same amount of time.

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In addition, the phenomenal bandwidth delivered by Gigabit Ethernet
is the most cost-effective method to take advantage of today and
tomorrow’s rapidly improving switching and routing internetworking
technologies. And with expected advances in the coming years in
silicon technology and digital signal processing that will enable
Gigabit Ethernet to eventually operate over unshielded twisted-pair
(UTP) cabling, outfitting your network with a powerful 1000-Mbps-
capable backbone/server connection which will create a flexible
foundation for the next generation of network technology products.
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
have been proposed to provide greater bandwidth and improve
client/server response times. Among them, 100BASE-T (Fast
Ethernet) provides a non-disruptive, smooth evolution from the
current 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 CSMA/CD Ethernet protocol. Since the 100Mbps
Fast Ethernet is compatible with all other 10Mbps Ethernet
environments, it provides a straightforward upgrade and utilizes
existing investments in hardware, software, and personnel training.
Switching Technology
Another approach to push beyond the limits of Ethernet technology is
the development of switching technology. A switch bridges Ethernet

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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 dividing a local area
network into different segments, which won’t compete with each other
for network transmission capacity.
The switch acts as a high-speed selective bridge between the
individual segments. The switch, without interfering with any other
segments, automatically forwards traffic that needs to go from one
segment to another. By doing this the total network capacity is
multiplied, while still maintaining the same network cabling and
adapter cards.
Features
♦Address Table: Supports up to 8K MAC address per device
♦Supports a packet buffer of up to 1024K Bytes
♦IGMP Snooping support
♦IEEE802.1D Spanning Tree
♦Support static Port Trunk
♦Port Mirroring support
♦IEEE802.1Q VLAN
♦IEEE802.1p Priority Queues
♦IEEE802.1X Port-based Access Control
♦Supports Broadcast Storm Control

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♦Supports Static MAC setting
♦D-Link Safeguard Engine support
♦Supports Simple Network Management Protocol(SNMP)
♦MIB support for: RFC1213 MIB II, Private MIB
♦Supports DHCP client
♦Supports Port setting for Speed, Duplex Mode
♦Easy configuration via Web Browser
♦Easy setting via SmartConsole Utility
♦Firmware backup and upload via Web GUI
♦System reboot via Web GUI
♦Provides parallel LED display for port status such as link/act,
speed, etc.
♦Reset configuration (h
♦IEEE802.3x flow control in full duplex mode
ardware and Web GUI)
Technical Specifications
Key Components / Performance
Switching Capacity 96Gbps
Max. Forwarding Rate
10M: 14,880 pps
100M: 148,809 pps
1G: 1,488,095 pps
Forwarding Mode Store and Forward
Packet Buffer memory 1024K Bytes

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SDRAM for CPU 8M Bytes
Flash Memory Prom 2M Bytes
Port Functions
LAN
- 48 x 10/100/1000BaseT ports
- Compliant with the following standards:
1. IEEE 802.3 compliance
2. IEEE 802.3u compliance
3. IEEE 802.3ab compliance
4. Support Full Duplex at 10/100Mbps and
1000Mbps only for SFP ports
Combo ports in the
front panel
- 4 SFP Combo Ports (port 45~48)
- SFP Transceivers Supported:
1. DEM-310GT (1000BASE-LX), up to
10km
2. DEM-311GT (1000BASE-SX), up to
550m
3. DEM-314GT (1000BASE-LH), up to
50km
4. DEM-315GT (1000BASE-ZX), up to
80km
5. DEM-312GT2 (1000BASE-SX), up to
2km
-WDM Transceivers Supported:
1. DEM-330T (TX-1550/RX-1310nm), up
to 10km, Single-Mode
2. DEM-330R (TX-1310/RX-1550nm), up
to 10km, Single-Mode
3. DEM-331T (TX-1550/RX-1310nm), up

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to 40km, Single-Mode
4. DEM-331R (TX-1310/RX-1550nm), up
to 40km, Single-Mode
-Compliant to the following standards:
1. IEEE 802.3z compliance
Chassis
Dimensions 19-inch, 1U Rack-mount size
440mm x 310mm x 44mm
Reset button on the
front panel A factory reset button x 1
Physical & Environment
AC input
100~240 VAC, 50/60Hz
Internal universal power supply
Operation
Temperature 0~40°C
Storage Temperature -10~70°C
Humidity Operation: 10%~90% RH
Storage: 5%~90% RH
Power consumption 99.7(watts)
Heat Dissipation 339.98(btu/hr)
MTBF 156505 (hours)

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Emission (EMI) and Safety Certifications
EMI-EMC Compliance: FCC Class A/ICES-003 Class A(FCC
Part 15B), CE Class A(EN55022/24), C-Tick ClassA(AS/NZS
CISPR 22) , VCCI Class A(VCCI-2005)
Safety Compliance: cUL(UL 60950-1), LVD(EN 60950-1)

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UNPACKING AND INSTALLATION
This chapter provides unpacking and installation information for the
Smart Switch.
Unpacking
Carefully unpack the contents of the Smart Switch from the box and
locate the following items:
One DGS-1248T Gigabit Smart Switch
One AC power cord, suitable for the local electrical power voltage
requirements
Four rubber feet to be used for shock cushioning
Screws and two mounting brackets
CD-Rom with the SmartConsole Utility application, which includes
the full User’s Manual
Quick Installation Guide
If any item is found missing or damaged, please contact the reseller
for replacement.
Installation
The site chosen for installation greatly affects the Web-Smart
Switch’s performance. When installing, consider the following points:
Install the Switch in a fairly cool and dry place. See Technical
Specifications for the acceptable temperature and humidity
operating ranges.

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Install the DGS-1248T in a site free from strong electromagnetic field
generators (such as motors), vibration, dust, and direct exposure to
sunlight.
Leave at least 10cm (about 4 inches) of space at the front and rear of
the switch for ventilation.
Install the DGS-1248T on a sturdy, level surface that can support its
weight, or in an EIA standard-size equipment rack. For information on
rack installation, see the next section, Rack Mounting.
When installing the Switch on a level surface, attach the rubber
pads (feet) to the bottom. The rubber feet cushion the switch and
helps protect the case from scratches.
.
Figure 1 – Attach the adhesive rubber pads to the bottom
Rack Mounting
The Switch can be mounted in an EIA standard-size, 19-inch rack or
chassis, which can be placed in a wiring closet with other equipment.
Attach the mounting brackets to both sides of the Switch (one on each
side), and secure them with the provided screws.

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Figure 2 – Attach the mounting brackets to the Switch
Use the screws provided with the equipment rack or chassis to mount
the Switch in the rack.
Figure 3 – Mount the Switch in the rack or chassis
Connecting Network Cable
The DGS-1248T has 48-Ports 10/100/1000Mbps that support
1000Mbps Gigabit Ethernet that can operate in Auto-negotiate

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mode, and 10Mbps Ethernet or 100Mbps Fast Ethernet modes that
run both in half and full duplex modes; it also has 4 Mini GBIC
Combo Ports. Each port on the DGS-1248T supports Auto-
MDI/MDI-X. Auto-MDI/MDI-X is a feature that eliminates the
need for worrying about using either a standard or crossover
cable—you can use either one—and allows any port to be an
uplink port.
AC Power
The DGS-1248T can be used with an AC power supply of 100~240V
AC, 50~60Hz. 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.

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IDENTIFYING EXTERNAL COMPONENTS
This chapter describes the front panel, rear panel, and LED indicators
of the Switch.
Front Panel
The figure below shows the front panel of the Switch.
Figure 4 – Front panel of the 48-port Web-Smart Switch
Reset button:
The Reset button resets all configuration settings back to the factory
default.
Note: Be sure to save or record any custom settings configured on
the Switch before pressing the reset button. Resetting the Switch
back to factory default settings will erase all custom configurations.
LED Indicator:
Comprehensive LED indicators display the status of the switch and
the network (see the Understanding LED Indicators section).
1000 BASE-T Twisted Pair Ports (Port 1~48)
The DGS-1248T is equipped with 48 gigabit twisted pair ports that
are auto negotiable 10/100/1000Mbps and also support auto

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MDI/MDIX crossover detection. All these 48 ports can operate in
half- and full- duplex modes for 10/100Mbps, and will be
automatically activated when a compatible terminal is identified.
10/100/1000 BASE-T / Mini GBIC Combo Ports (Option Port
45~48)
The Switch is also equipped with four combo 10/100/1000 Base-T /
Mini GBIC ports, supporting optional 1000BASE-SX/LX Mini
GBIC modules for fiber uplinks.
Note: When a port is set to “Forced Mode”, the Auto MDI/MDIX
will be disabled.
Rear Panel
Figure 5 – Rear panel of the Switch
AC Power Connector:
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 100-240V AC, and 50-60Hz.
A
C Power Connector

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Understanding LED Indicators
The front panel LEDs provides instant status feedback and simplifies
monitoring and troubleshooting tasks.
Figure 6 – LED indicators of the Switch
Power and System LEDs
Power LEDs
On When the Power LED light is on, the Switch is receiving
power.
Off When the Power LED light is off, the power cord is
improperly connected.
CPU LEDs ( Management Indicator)
Blinking When the CPU is working, the CPU LED is blinking.
Off The CPU is idle.
Ports 1 ~ 48 Status LEDs

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Link/Act
On When the Link/Act LED light is 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.
1000Mbps (Shown in Green)
On When the LED light is a solid green, the respective port
is connected to a 1000Mbps Gigabit Ethernet network.
Off No link.
10/100Mbps (Shown in Amber)
On When the LED light is solid amber, the respective port is
connected to a 1000Mbps Gigabit Ethernet network.
Off No link.