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DSL-2500U
User Manual
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D-Link DSL-2500U User Guide

Table of Contents
D-Link DSL-2500U User Manual
1
Table of Contents
Table of Contents
PACKAGE CONTENTS...................................................................................................... 3
SYSTEM REQUIREMENTS ................................................................................................3
FEATURES ...................................................................................................................... 4
HARDWARE OVERVIEW..................................................................................................6
Connections..............................................................................................................6
LEDs......................................................................................................................... 7
INSTALLATION .............................................................................................................8
BEFORE YOU BEGIN....................................................................................................... 8
INSTALLATION NOTES ....................................................................................................8
INFORMATION YOU WILL NEED FROM YOUR ADSL SERVICE PROVIDER....................10
INFORMATION YOU WILL NEED ABOUT DSL-2500U..................................................12
DEVICE INSTALLATION................................................................................................. 14
Power on Router.....................................................................................................14
Factory Reset Button ..............................................................................................15
Network Connections..............................................................................................15
CONFIGURATION.......................................................................................................16
WEB-BASED CONFIGURATION UTILITY ........................................................................16
DEVICE INFO...............................................................................................................17
SUMMARY.................................................................................................................... 18
WAN............................................................................................................................18
STATI ST IC S ...................................................................................................................19
ROUTE ......................................................................................................................... 21
ARP.............................................................................................................................21
DHCP..........................................................................................................................21
Static Route.............................................................................................................42
DIAGNOSTICS .............................................................................................................46
MANAGEMENT ........................................................................................................... 47
Services ..................................................................................................................50
IP Address .............................................................................................................. 51
Passwords...............................................................................................................51
TROUBLESHOOTING ................................................................................................ 53
NETWORKING BASICS ............................................................................................. 56
TECHNICAL SPECIFICATIONS...............................................................................58
QUICK SETUP ..............................................................................................................22
ADVANCED SETUP .....................................................................................................37
WAN............................................................................................................................37
LAN ............................................................................................................................39
QUALITY OF SERVICE ...................................................................................................40
Queue Config..........................................................................................................40
QoS Classification..................................................................................................41
ROUTING......................................................................................................................42
Default Gateway..................................................................................................... 42
D-Link DSL-2500U User Manual
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Section 1 - Product Overview
Package Contents
• DSL-2500U ADSL2+ Router
• Power Adapter
• CD-ROM with User Manual
• One twisted-pair telephone cable used for ADSL connection
• One straight-through Ethernet cable
• One Quick Installation Guide
• One Splitter
Note: Using a power supply with a different voltage rating than the one included
with the DSL-2500U will cause damage and void the warranty for this product.
System Requirements
• ADSL Internet service
• Computer with:
• 200MHz Processor
• 64MB Memory
• CD-ROM Drive
• Ethernet Adapter with TCP/IP Protocol Installed
• Internet Explorer v6 or later, FireFox v1.5
• Computer with Windows 2000, Windows XP, or Windows Vista
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Section 1 - Product Overview
11
Features
• PPP (Point-to-Point Protocol) Security – The DSL-2500U ADSL Router supports PAP (Password Authentication Protocol) and CHAP (Challenge Handshake Authentication Protocol) for PPP connections. The Router also supports MSCHAP.
• DHCP Support – Dynamic Host Configuration Protocol automatically and dynamically assigns all LAN IP settings to each host on your network. This eliminates the need to reconfigure every host whenever changes in network topology occur.
• Network Address Translation (NAT) – For small office environments, the DSL-2500U allows multiple users on the LAN to access the Internet concurrently through a single Internet account. This provides Internet access to everyone in the office for the price of a single user. NAT improves network security in effect by hiding the private network behind one global and visible IP address. NAT address mapping can also be used to link two IP domains via a LAN-to-LAN connection.
• TCP/IP (Transfer Control Protocol/Internet Protocol) – The DSL-2500U supports TCP/IP protocol, the language used for the Internet. It is compatible with access servers manufactured by major vendors.
• Static Routing – This allows you to select a data path to a particular network destination that will remain in the routing table and never “age out”. If you wish to define a specific route that will always be used for data traffic from your LAN to a specific destination within your LAN (for example to another router or a server) or outside your network (to an ISP defined default gateway for instance).
• Default Routing – This allows you to choose a default path for incoming data packets for which the destination address is unknown. This is particularly useful when/if the Router functions as the sole connection to the Internet.
• ATM (Asynchronous Transfer Mode) – The DSL-2500U supports Bridged Ethernet over ATM (RFC1483), IP over ATM (RFC1577), and PPP over ATM (RFC 2364).
• Precise ATM Traffic Shaping – Traffic shaping is a method of controlling the flow rate of ATM data cells. This function helps to establish the Quality of Service for ATM data transfer.
• G.hs (Auto-handshake) – This allows the Router to automatically choose either the G.lite or G.dmt ADSL connection standards.
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Section 1 - Product Overview
• High Performance – Very high rates of data transfer are possible with the Router. Up to 8 Mbps downstream bit rate using the G.dmt standard.
• Full Network Management – The DSL-2500U incorporates SNMP (Simple Network Management Protocol) support for web-based management and text-based network management via an RS-232 or Telnet connection.
• Telnet Connection – The Telnet enables a network manager to access the Router’s management software remotely.
• Easy Installation – The DSL-2500U uses a web-based graphical user interface program for convenient management access and easy set
up. Any common web browser software can be used to manage the Router.
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Section 1 - Product Overview
•
ADSL Port
Use the ADSL cable to connect to the your telephone line (RJ-11 port)
Hardware Overview
Connections
Reset Button
To manually reset, depress button with the power on for at least seven seconds
Ethernet Port
Use the Ethernet port to connect the Router to a computer or an Ethernet LAN
Power Button
Push in to power-on the Router. Push again to power-off the Router
Power Insert
Use the adapter shipped with the Router to connect to power source
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Section 1 - Product Overview
Power
A steady green light indicates the unit is powered on. When the device is powered off it remains dark. Lights steady green during power on self-test (POST) means the power connection works properly.
Hardware Overview
LEDs
DSL
A steady green light indicates a valid ADSL connection. This will light after the ADSL negotiation process has been settled. A blinking green light indicates activity on the WAN (ADSL)
Internet
A steady green light indicates a valid internet connection.
LAN
A solid green light indicates a valid link on startup. This light will blink when there is activity currently passing through the Ethernet port.
Status
A blinking green light indicates the system is operating normally. System failure is indicated by either a steady green or dark light.
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Section 2 – Installation
Installation
This section will walk you through the installation process. Placement of the Router is very important. Do not place the Router in an enclosed area such as a closet, cabinet, or in the attic or garage.
Before You Begin
Please read and make sure you understand all the prerequisites for proper installation of your new Router. Have all the necessary information and equipment on hand before beginning the installation.
Installation Notes
In order to establish a connection to the Internet it will be necessary to provide information to the Router that will be stored in its memory. For some users, only their account information (Username and Password) is required. For others, various parameters that control and define the Internet connection will be required. You can print out the two pages below and use the tables to list this information. This way you have a hard copy of all the information needed to setup the Router. If it is necessary to reconfigure the device, all the necessary information can be easily accessed. Be sure to keep this information safe and private.
Low Pass Filters
Since ADSL and telephone services share the same copper wiring to carry their respective signals, a filtering mechanism may be necessary to avoid mutual interference. A low pass filter device can be installed for each telephone that shares the line with the ADSL line. These filters are easy to install passive devices that connect to the ADSL device and/or telephone using standard telephone cable. Ask your service provider for more information about the use of low pass filters with your installation.
Operating Systems
The DSL-2500U uses an HTML-based web interface for setup and management. The web configuration manager may be accessed using any operating system capable of running web browser software, including Windows 98 SE, Windows ME, Windows 2000, Windows XP, and Windows Vista.
Web Browser
Any common web browser can be used to configure the Router using the web configuration management software. The program is designed to work best with more recently released browsers such as Opera, Microsoft Internet Explorer® version 6.0, Netscape Navigator® version 6.2.3, or
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Section 2 – Installation
later versions. The web browser must have JavaScript enabled. JavaScript is enabled by default on many browsers. Make sure JavaScript has not been disabled by other software (such as virus protection or web user security packages) that may be running on your computer.
Ethernet Port (NIC Adapter)
Any computer that uses the Router must be able to connect to it through the Ethernet port on the Router. This connection is an Ethernet connection and therefore requires that your computer be equipped with an Ethernet port as well. Most notebook computers are now sold with an Ethernet port already installed. Likewise, most fully assembled desktop computers come with an Ethernet NIC adapter as standard equipment. If your computer does not have an Ethernet port, you must install an Ethernet NIC adapter before you can use the Router. If you must install an adapter, follow the installation instructions that come with the Ethernet NIC adapter.
Additional Software
It may be necessary to install software on your computer that enables the computer to access the Internet. Additional software must be installed if you are using the device a simple bridge. For a bridged connection, the information needed to make and maintain the Internet connection is stored on another computer or gateway device, not in the Router itself.
If your ADSL service is delivered through a PPPoE or PPPoA connection, the information needed to establish and maintain the Internet connection can be stored in the Router. In this case, it is not necessary to install software on your computer. It may however be necessary to change some settings in the device, including account information used to identify and verify the connection.
All connections to the Internet require a unique global IP address. For bridged connections, the global IP settings must reside in a TCP/IP enabled device on the LAN side of the bridge, such as a PC, a server, a gateway device such as a router or similar firewall hardware. The IP address can be assigned in a number of ways. Your network service provider will give you instructions about any additional connection software or NIC configuration that may be required.
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Section 2 – Installation
Information you will need from your ADSL service
provider
Username
This is the Username used to log on to your ADSL service provider’s network. Your ADSL service provider uses this to identify your account.
Password
This is the Password used, in conjunction with the Username above, to log on to your ADSL service provider’s network. This is used to verify the identity of your account.
WAN Setting / Connection Type
These settings describe the method your ADSL service provider uses to transport data between the Internet and your computer. Most users will use the default settings. You may need to specify one of the following WAN Setting and Connection Type configurations (Connection Type settings listed in parenthesis):
• PPPoE/PPoA (PPPoE LLC, PPPoA LLC or PPPoA VC-Mux)
• Bridge Mode (1483 Bridged IP LLC or 1483 Bridged IP VC Mux)
• IPoA/MER (Static IP Address) (Bridged IP LLC, 1483 Bridged IP VC Mux, 1483 Routed IP LLC, 1483 Routed IP VC-Mux or IPoA)
• MER (Dynamic IP Address) (1483 Bridged IP LLC or 1483 Bridged IP VC-Mux)
Modulation Type
ADSL uses various standardized modulation techniques to transmit data over the allotted signal frequencies. Some users may need to change the type of modulation used for their service. The default DSL modulation (ADSL2+ Multi-Mode) used for the Router automatically detects all types of ADSL, ADSL2, and ADSL2+ modulation.
Security Protocol
This is the method your ADSL service provider will use to verify your Username and Password when you log on to their network. Your Router supports the PAP and CHAP protocols.
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Section 2 – Installation
VPI
Most users will not be required to change this setting. The Virtual Path Identifier (VPI) is used in conjunction with the Virtual Channel Identifier (VCI) to identify the data path between your ADSL service provider’s network and your computer. If you are setting up the Router for multiple virtual connections, you will need to configure the VPI and VCI as instructed by your ADSL service provider for the additional connections. This setting can be changed in the WAN Settings window of the web management interface.
VCI
Most users will not be required to change this setting. The Virtual Channel Identifier (VCI) used in conjunction with the VPI to identify the data path between your ADSL service provider’s network and your computer. If you are setting up the Router for multiple virtual connections, you will need to configure the VPI and VCI as instructed by your ADSL service provider for the additional connections. This setting can be changed in the WAN Settings window of the web management interface.
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Section 2 – Installation
Information you will need about DSL-2500U
Username
This is the Username needed to access the Router’s management interface. When you attempt to connect to the device through a web browser you will be prompted to enter this Username. The default Username for the Router is “admin.” The user cannot change this.
Password
This is the Password you will be prompted to enter when you access the Router’s management interface. The default Password is “admin.” The user may change this.
LAN IP addresses for the DSL-2500U
This is the IP address you will enter into the Address field of your web browser to access the Router’s configuration graphical user interface (GUI) using a web browser. The default IP address is 192.168.1.1. This may be changed to suit any IP address scheme the user desires. This address will be the base IP address used for DHCP service on the LAN when DHCP is enabled.
LAN Subnet Mask for the DSL-2500U
This is the subnet mask used by the DSL-2500U, and will be used throughout your LAN. The default subnet mask is 255.255.255.0. This can be changed later.
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Section 2 – Installation
Information you will need about your LAN or computer:
Ethernet NIC
If your computer has an Ethernet NIC, you can connect the DSL-2500U to this Ethernet port using an Ethernet cable. You can also use the Ethernet ports on the DSL-2500U to connect to other computer or Ethernet devices.
DHCP Client status
Your DSL-2500U ADSL Router is configured, by default, to be a DHCP server. This means that it can assign an IP address, subnet mask, and a default gateway address to computers on your LAN. The default range of IP addresses the DSL-2500U will assign are from 10.1.1.2 to 10.1.1.254. Your computer (or computers) needs to be configured to obtain an IP address automatically (that is, they need to be configured as DHCP clients.)
It is recommended that your collect and record this information here, or in some other secure place, in case you have to re-configure your ADSL connection in the future.
Once you have the above information, you are ready to setup and configure your DSL-2500U ADSL Router.
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Section 2 – Installation
Device Installation
The DSL-2500U connects two separate physical interfaces, an ADSL (WAN) and an Ethernet (LAN) interface. Place the Router in a location where it can be connected to the various devices as well as to a power source. The Router should not be located where it will be exposed to moisture or excessive heat. Make sure the cables and power cord are placed safely out of the way so they do not create a tripping hazard. As with any electrical appliance, observe common sense safety procedures.
The Router can be placed on a shelf or desktop, ideally you should be able to see the LED indicators on the front if you need to view them for troubleshooting.
Power on Router
The Router must be used with the power adapter included with the device.
1. Insert the AC Power Adapter cord into the power receptacle located on the rear panel of the Router and plug the adapter into a suitable nearby power source.
2. Depress the Power button into the on position. You should see the Power LED indicator light up and remain lit. The Status LED should light solid green and begin to blink after a few seconds.
3. If the Ethernet port is connected to a working device, check the Ethernet Link/Act LED indicators to make sure the connection is valid. The Router will attempt to establish the ADSL connection, if the ADSL line is connected and the Router is properly configured this should light up after several seconds. If this is the first time installing the device, some settings may need to be changed before the Router can establish a connection.
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Section 2 – Installation
Factory Reset Button
The Router may be reset to the original factory default settings by using a ballpoint or paperclip to gently push down the reset button in the following sequence:
1. Press and hold the reset button while the device is powered off.
2. Turn on the power.
3. Wait for 5~8 seconds and then release the reset button.
Remember that this will wipe out any settings stored in flash memory including user account information and LAN IP settings. The device settings will be restored to the factory default IP address 192.168.1.1 and the subnet mask is 255.255.255.0, the default management Username is “admin” and the default Password is “admin.”
Network Connections
Connect ADSL Line
Use the ADSL cable included with the Router to connect it to a telephone wall socket or receptacle. Plug one end of the cable into the ADSL port (RJ-11 receptacle) on the rear panel of the Router and insert the other end into the RJ-11 wall socket. If you are using a low pass filter device, follow the instructions included with the device or given to you by your service provider. The ADSL connection represents the WAN interface, the connection to the Internet. It is the physical link to the service provider’s network backbone and ultimately to the Internet.
Connect Router to Ethernet
The Router may be connected to a single computer or Ethernet device through the 10BASE-TX Ethernet port on the rear panel. Any connection to an Ethernet concentrating device such as a switch or hub must operate at a speed of 10/100 Mbps only. When connecting the Router to any Ethernet device that is capable of operating at speeds higher than 10Mbps, be sure that the device has auto-negotiation (NWay) enabled for the connecting port. Use standard twisted-pair cable with RJ-45 connectors. The RJ-45 port on the Router is a crossed port (MDI-X). Follow standard Ethernet guidelines when deciding what type of cable to use to make this connection. When connecting the Router directly to a PC or server use a normal straight-through cable. You should use a crossed cable when connecting the Router to a normal (MDI-X) port on a switch or hub. Use a normal straight-through cable when connecting it to an uplink (MDI-II) port on a hub or switch. The rules governing Ethernet cable lengths apply to the LAN to Router connection. Be sure that the cable connecting the LAN to the Router does not exceed 100 meters.
Hub or Switch to Router Connection
Connect the Router to an uplink port (MDI-II) on an Ethernet hub or switch with a straight-through cable. If you wish to reserve the uplink port on the switch or hub for another device, connect to any on the other MDI-X ports (1x, 2x, etc.) with a crossed cable.
Computer to Router Connection
You can connect the Router directly to a 10/100BASE-TX Ethernet adapter card (NIC) installed on a PC using the Ethernet cable provided. D-Link DSL-2500U User Manual
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Section 3 – Configuration
Configuration
This section will show you how to configure your new D-Link Router using the web-based configuration utility.
Web-based Configuration Utility
Connect to the Router
The default IP address for ADSL MODEM is: 192.168.1.1; The Subnet Mask is：255.255.255.0. Users can configure ADSL MODEM through an Internet browser. ADSL MODEM can be used as gateway and DNS server; users need to set the computer’s TCP/IP protocol as follow:
1. Set the computer IP address at same segment of ADSL MODEM, such as set the IP address of the network card to one of the “192.168.1.2”
～ “192.168.1.254”.
2. Set the computer’s gateway the same IP address as the ADSL Modem’s.
3. Set computer’s DNS server the same as ADSL Modem’s IP address or that of an effective DNS server.
To access the configuration utility, open a web-browser such as Internet Explorer and enter the IP address of the router (192.168.1.1).
Type “admin” for the User Name and “admin” in the Password field. If you get a Page Cannot be Displayed error, please refer to the Troubleshooting section for assistance.
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Section 3 – Configuration
Device Info
To access the Device Info window, click either the Device Info or Summary button in the Device Info directory. The following page opens:
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Section 3 – Configuration
Summary
This window displays the current status of your DSL connection, including the software version, LAN IP address, and DNS server address.
WAN
To access the WAN Info window, click the WAN button in the Device Info directory.
This window displays the current status of your WAN connection.
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