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