AresGate 2560/2561
AresGate 2560/2561
AresGate 2560/2561AresGate 2560/2561
802.11b ADSL Wireless LAN Router
802.11b ADSL Wireless LAN Router
802.11b ADSL Wireless LAN Router802.11b ADSL Wireless LAN Router
Software User’s Guide
Software User’s Guide
Software User’s GuideSoftware User’s Guide
Ver si o n 2 .0
June 2002
ARESCOM, INC.
3541 Gateway Blvd.
Fremont, CA 94538
USA
http://www.arescom.com
COPYRIGHT & TRADEMARKS
Copyright © 2002 ARESCOM, INC. All rights reserved. ARESCOM, ARESCOM CDS are trademarks of ARESCOM, INC.
Microsoft and Windows 95/98/2000/NT/Me are registered trademarks of Microsoft Corporation. Pentium is a registered trademark of Intel Corporation. All other trademarks and registered trademarks belong to their respective companies.
ARESCOM, Inc. has the right to make revisions and to change the contents of this document without any obligation to provide
prior notice of such revisions and changes.
ARESCOM has the right to make improvements or changes in the product(s) and/or software(s) described in this documentation. All specifications are subject to changes without notice.
No part of this documentation or software may be reproduced or distributed in any form without prior written permission from
ARESCOM, INC.
Table of Contents
CHAPTER 1 OVERVIEW
1.1 Introduction .........................................................................................................................1
1.2 Features ...............................................................................................................................1
1.3 Package Includes .................................................................................................................1
1.4 Minimum System Requirements ........................................................................................1
1.5 Management Interface Options ...........................................................................................2
1.5.1 HTML Interface (Web-based) ............................................................................. 2
1.5.2 SNMP (Simple Network Management Protocol) ................................................ 2
1.6 Network Scenario ...............................................................................................................3
CHAPTER 2 HARDWARE INSTALLATION
2.1 Front Panel Information ......................................................................................................5
2.2 Back Panel Information ......................................................................................................6
2.3 Location & Placement ........................................................................................................6
2.4 Setup Instructions ...............................................................................................................7
CHAPTER 3 BEFORE YOU START
CHAPTER 4 SOFTWARE CONFIGURATION
4.1 Open Your Browser ..........................................................................................................11
4.2 Basic - SETUP ..................................................................................................................12
4.3 Basic - WIRELESS ...........................................................................................................14
4.4 Basic - AUTHENTICATION ...........................................................................................16
4.5 Basic - DHCP ....................................................................................................................18
4.5.1 Reserved IP Table ............................................................................................. 19
4.6 Basic - USER STATUS ....................................................................................................20
4.6.1 Current Log-on User Status ............................................................................. 20
4.7 Basic - STATUS ...............................................................................................................21
4.8 Advanced - ADMINISTRATION ....................................................................................23
4.8.1 Administration ..................................................................................................23
4.9 Advanced - IP ROUTING ................................................................................................25
4.9.1 Current IP Routing Table ................................................................................. 25
4.9.2 Add Route ......................................................................................................... 25
4.9.3 Delete Route ..................................................................................................... 25
4.10 Advanced - SNMP ............................................................................................................26
4.10.1 Current SNMP Table ........................................................................................26
4.10.2 Add SNMP Entry ..............................................................................................27
4.10.3 Delete SNMP Entry ..........................................................................................27
4.11 Advanced - UPGRADE ....................................................................................................28
AG2500Series Software User’s Guide June 2002 iii
Table of Contents
CHAPTER 5 TROUBLESHOOTING
5.1 FAQ ..................................................................................................................................29
APPENDIX A TECHNICAL SPECIFICATIONS
A.1 Hardware Specifications ...................................................................................................31
A.2 Software Features .............................................................................................................33
APPENDIX B SNMP SPECIFICATIONS
B.1 Standard Bridge MIB ........................................................................................................37
B.2 Private MIB Implememtation ...........................................................................................38
B.2.1 Terminalogy ......................................................................................................38
B.2.2 MIB Description ...............................................................................................39
APPENDIX C CABLE AND CONNECTORS
C.1 Connector Specifications ..................................................................................................45
C.1.1 10/100 Ports ..................................................................................................... 45
C.2 Cable Specification ...........................................................................................................45
C.2.1 RJ-45 ................................................................................................................. 45
APPENDIX D GLOSSARY
iv AG2500Series Software User’s Guide
CHAPTER 1: OVERVIEW
1.1 Introduction
The AresGate 2500 Series (AG2560/AG2561) Wireless ADSL Router is the perfect
networking solution to address the specific needs of enterprise wireless application
environments, such as airports, hotels, libraries, class rooms, cafés and other semipublic areas. With the built-in ADSL WAN interface, AresGate offers shared highspeed Internet connection rates of up to 8Mbps downstream and up to 800Kbps
upstream to your entire LAN network. Through an IEEE 802.11b wireless module,
AresGate delivers robust enterprise-level, secure wireless network access, which utilizes IEEE 802.1x protocol to perform user-based access control. Furthermore, to
simplify installation and reduce the total cost of ownership, AresGate 2500 Series
support inline power over Ethernet, thus eliminating the need for all power supply
cabling once and for all.
1.2 Features
• IEEE 802.1X Port-based Network Access Control.
• MAC and EAP/MD5 authentication.
• RADIUS server for accounting and user authentication purposes.
• ADSL standard compliance: T1.413, G.DMT and G.Lite.
• RIP 1, RIP2, NAT/PAT.
• ATM: AAL5, multiple protocol over AAL5, ATM Forum UNI3.1/4.0 PVC, up to 8
AAL5 PVC.
• PPP, PPP over AAL5 and PPPoE.
• DHCP server, DHCP client and DHCP relay.
• High performance 11Mbps data transfer rate.
• Interoperability with all IEEE 802.11b- compliant equipment.
• Up to 128-bit WEP (Wired Equivalent Privacy) encryption.
• Configurable web page for new user's registration.
• Inline power feature through RJ-45 Ethernet LAN port (optional).
1.3 Package Includes
• ARESCOM AresGate 2560/2561 Wireless Gateway (x 1).
• Power adapter and cord set (x 1).
• RJ-45 to RJ-45 straight-through Ethernet cable (x 1).
• RJ-11 to RJ-11 telephone cable (x 1).
• External wireless LAN antenna (x 1).
• ARESCOM Software CD (x 1).
• AresGate 2560/2561 Quick Setup (x 1).
1.4 Minimum System Requirements
• ADSL line.
• Microsoft Windows 98 or later version.
• 166 MHz Pentium or equivalent processor.
• 16 MB RAM or more.
• 170 MB available free hard disk space before installation.
• Available 10BaseT Ethernet on the main computer
• CD-ROM Drive
AG2500Series Software User’s Guide June, 2002 1
Management Interface Options
1.5 Management Interface Options
Access the AresGate management system through two simple management interface options:
1.5.1 HTML Interface (Web-based)
Through the built-in web-based GUI (Graphic User Interface), you can change the AresGate's settings,
upgrade its firmware, and monitor other wireless clients on the network. To use this management system, please follow the steps below:
Step 1. Open your web browser.
Step 2. Enter the AresGate's IP address (default: 192.168.10.1) in the browser Location field (Netscape Navi-
gator) or Address field (Internet Explorer).
Step 3. Press Enter to connect.
1.5.2 SNMP (Simple Network Management Protocol)
You can also use a SNMP management application to monitor and configure AresGate. The unit supports the following MIBs (Management Information Base) and protocols:
MIBs
• Standard MIB II (RFC 1213)
• Wireless LAN MIB (IEEE 802dot11)
•Private MIB
Protocols
• SNMP V1
• SNMP V2
NOTE: Please refer to Appendix B for more detailed SNMP information.
2 June, 2002 AG2500Series Software User ’s Guide
Network Scenario
1.6 Network Scenario
Figure 1.1 Single AresGate Device Network Scenario
AresGate provides a connection point to the wireless clients and the wired LAN (Figure 1.1). The
WAN port indicates an ADSL interface connection to the DSLAM (Digital Subscriber Line Access
Multiplier) in a central office over an existing phone line. The LAN port indicates an Ethernet interface
connection to a Local Area Network.
Authentication Processing
AresGate authenticates all the clients who are associated with it. Wireless users who wish to pass the
authentication must provide the correct username and password or a valid MAC address stored in a
Remote Authentication Dial-In User Service (RADIUS) server to access the Internet. Wireless users
who failed the authentication process are still permitted to access a pre-configured web page in the
access point for new user registration. Wired users on the LAN network are allowed to access the Internet directly without the authentication process.
Accounting Processing
AresGate sends an accounting message to a RADIUS server periodically during the session, and terminates the user if the session_time limit is reached. The session_time is configurable at the RADIUS
server, and AresGate receives the session_time value when authentication succeeds. User can configure idle_time timers, re-authentication option through RADIUS as well. When the session is terminated, AresGate sends the statistics to the RADIUS server, including session_time, packets, bytes, etc.
AG2500Series Software User’s Guide June, 2002 3
Network Scenario
Figure 1.2 illustrates AresGate wireless application in a semi-public area in conjunction with ARESCOM’s MTU DSL broadband platform, the ARESCOM CDS 6000 DSL Service System.
Figure 1.2 Multiple AresGate Devices Network Scenario
Roaming
When a wireless client moves from one coverage area to another, AresGate automatically performs client roaming within the same subnet and the service provided to the client is continuous and seamless.
4 June, 2002 AG2500Series Software User ’s Guide
CHAPTER 2: HARDWARE INSTALLATION
This chapter describes the front/back panel layout and installation procedure for AresGate.
2.1 Front Panel Information
Figure 2.1 AG2500 Front Panel
PWR (Power)
A PWR LED is ON when power is supplied to the AresGate.
DIAG (Diagnostic)
The DIAG LED indicates the AresGate is in a self-diagnostic mode during boot-up.
Once the AresGate boots up successfully, the LED will turn off. If there is a software
malfunction or a problem with the device, the LED will remain on.
WA N
LAN
WLAN
The WAN LED displays the 10BaseT DSL LINE port connection status between the
AG2000 and a DSL line. The WAN LED flashes during the initialization of the DSL
line. When DSL synchronization is achieved, it remains solid on.
The LAN LED displays the 10BaseT Ethernet connection between the AG2000 and
an Ethernet network. The LAN LED is solid on when a valid Ethernet link is established. The LED flashes when data is flowing from/to this Ethernet port.
The WLAN LED flashes very slow when there is no activity on this wireless port.
The LED flashes quickly when data is flowing from/to this port.
AG2500Series Software User’s Guide June, 2002 5
2.2 Back Panel Information
Figure 2.2 AG2500 Back Panel
PHONE
The PHONE port allows you to connect to an external telephone set.
DSL LINE
The DSL port is where you connect the AresGate to a telephone outlet.
POWER (13.5V AC/1A)
The POWER port is where you connect the 13.5V AC power adapter.
Back Panel Information
RESET
Push this reset button to power-cycle the AresGate device.
LAN
The LAN port connects the AresGate to a PC, hub or switch on your wired LAN network.
Antenna Connector
The included external antenna needs to be securely attached to the antenna connector located on the far
right side of the back panel.
2.3 Location & Placement
• For maximum wireless coverage, locate an installation spot where there is a minimum number of
walls, ceilings or other objects that will block the radio transmission between the AresGate and the
wireless clients.
• Choose an installation location that is away from direct sunlight.
• It is important to place the AresGate device in the center of all the wireless clients.
• Place AresGate on a predetermined surface, so you can see the back panel for convenient cable connection.
6 June, 2002 AG2500Series Software User ’s Guide
Setup Instructions
2.4 Setup Instructions
Before you start the setup process, make sure you follow the instructions below:
Step 1. Disconnect the broadband service. Make sure your DSL broadband connection is shut down properly.
Step 2. Turn off the power. Make sure the DSL modem and AresGate equipment are all turned off.
Step 3. Connecting the external antenna.
Tightly attach the included external antenna to the antenna connector on the back
panel (For maximum range, make sure the antenna is perpendicular to the
ground).
Step 4. Connecting to the LAN port.
Connect the RJ-45 to RJ-45 Ethernet cable (included) from the wired Ethernet LAN
(such as a PC, hub or switch) to the LAN port on the back of the AresGate.
Step 5. Connecting to the DSL LINE port.
Connect the RJ-11 to RJ-11 telephone cable (included) to AresGate’s DSL LINE port
and the other end of the telephone cable to the telephone wall outlet, on which the DSL
service is activated.
Step 6. Connecting to the POWER port.
Connect the AC power adapter to AresGate’s POWER port. Connect
the AC plug from the power adapter into a wall outlet or power strip.
AG2500Series Software User’s Guide June, 2002 7
Setup Instructions
8 June, 2002 AG2500Series Software User ’s Guide
CHAPTER 3: BEFORE YOU START
AresGate offers a platform-independent, HTML-based GUI (graphical user interface)
to simplify the setup and configuration of your AresGate device by using web
browser. All PCs on your LAN network need to be set up properly in order to communicate with the AresGate device. Please carefully read and follow the instructions
below before you start configuring your AG2000:
1. Set up the wireless device:
If you have a wireless device installed on your computer and want to use it to connect
to the AG2000, set its channel number to 6, SSID to AG2500, and operating mode to
Infrastructure.
NOTE: The SSID is case-sensitive.
2. Set up an IP address for your PC:
Since AresGate can automatically assign IP address, subnet mask, and gateway IP
address to your network PCs through its DHCP server, we highly recommend that
you configure your TCP/IP Properties to Obtain an IP address automatically. Select
the proper network adapter, either an Ethernet or a Wireless Adapter, that you are
using to connect to the AresGate.
NOTE: You CANNOT connect a PC to AresGate through an Ethernet networking card and a
wireless device installed in your PC at the same time
Follow the instructions below to complete the setup:
For Windows 95/98/ME users:
Step 1. Click Start -> Settings -> Control Panel.
Step 2. Double-click Network.
Step 3. Double-click TCP/IP -> XXXX Ethernet/Wireless Adapters (“XXXX” is the maker
of your Ethernet card).
Step 4. Select the radio button next to Obtain an IP address automatically.
Step 5. Click the Gateway tab and remove all previously installed gateways and click OK.
Step 6. Click OK again.
Step 7. Restart your computer.
For Windows 2000/XP users:
Step 1. Right-click the My Network Places icon in the desktop.
Step 2. Click Properties.
Step 3. Right-click Local Area Connection.
Step 4. Click Properties.
Step 5. Double-click Internet Protocol (TCP/IP).
Step 6. Select the radio button next to Obtain an IP address automatically and click OK.
Step 7. Click OK again.
AG2500Series Software User’s Guide June, 2002 9
3. Verify your PC’s IP address:
It MUST be 192.168.10.X (where X is in the range of 2-254). To verify your PC’s IP address, please
follow the instructions below:
For Windows 95/98/ME users:
Step 1. Click Start -> Run.
Step 2. Enter winipcfg and click OK to prompt the IP Configuration window.
Step 3. Select the correct Ethernet or Wireless networking adapter in the white dropdown box.
Step 4. If the IP address displayed in the IP Address box is not 192.168.10.X. (where X is in the range of 2-
254), you need to click Release All -> Renew All buttons to have the correct IP address assigned from
your AG2000 to your PC.
For Windows 2000/XP users:
Step 1. Click Start -> Run.
Step 2. Enter command and click OK to prompt the Windows DOS window.
Step 3. Enter ipconfig and click OK. Windows will display the Windows IP Configuration information.
Step 4. If the IP address displayed in the IP Address field is not 192.168.10.X. (where X is in the range of 2-
254), you need to enter ipconfig /release and then ipconfig /renew commands to receive a correct IP
address from the AG2000.
4. Verify your PC’s Internet Properties setting if you were previously using an analog
modem.
Please follow the steps below:
Step 1. Click Start, point to Settings, and then click Control Panel.
Step 2. Double-click Internet Options, and then click the Connections tab.
Step 3. Click Never dial a connection, click Apply, and then click OK.
10 June, 2002 AG2500Series Software User’s Guide
CHAPTER 4: SOFTWARE CONFIGURATION
4.1 Open Your Browser
Follow the steps below to open your web browser:
Step 1. Launch a web browser (i.e. Internet Explorer or Netscape Navigator) from your com-
puter.
Enter the default URL http://192.168.10.1 and press Enter.
Figure 4.1 Opening an Internet Web Browser
The Web browser may take a minute or two to log on to your AresGate for first time
access. (Pressing the Enter key or clicking the Go button twice may speed up the log-
on process).
AresGate’s web GUI is divided into two sections: Basic and Advanced.
The Basic section allows you to configure basic setup features and view the status of
the AresGate. It contains the following GUI pages:
•SETUP
• WIRELESS
• AUTHENTICATION
•DHCP
•USER STATUS
•STATUS
The Advanced section allows users to have greater control over the AresGate device.
It contains the following pages:
• ADMINISTRATION
•PORT MAPPING
• IP ROUTING
•SNMP
•UPGRADE
AG2500Series Software User’s Guide June, 2002 11
4.2 Basic - SETUP
Figure 4.1 SETUP Page
Basic - SETUP
Consult your ISP and use the SETUP page to configure AresGate’s ATMPVC WAN interface.
Encapsulation: Allows you to choose the following encapsulation types at the ATM interface:
a. Not in Use
b. SNAP/IP
c. PPPoA VC MUX
d. PPPoA LLC
e. PPPoE
f. SNAP/Bridge
g. Bridge Routing
VPI: A virtual path is a semi-permanent connection between endpoints in an ATM
network and may support one or more virtual channels. In Private Virtual
Circuit (PVC) mode, the Virtual Path Identifier (VPI), which is a header
subfield, is assigned manually when ADSL Bridge is used. Different VPI
values allow the endpoints to discriminate between different virtual
connections between ATM nodes.
The minimum and maximum values of the VPI are 0 and 255, respectively. At
default, VPI is set to 0.
VCI: Each connection in an ATM network is characterized by a Virtual Channel
Identifier (VCI). This is a header subfield that is assigned manually when
ADSL Bridge is used. A VCI has only local significance on the link between
ATM nodes. When the connection is released, the VCI value on the involved
links will be released and can be reused by other connections.
The minimum and maximum values of the VCI are 32 and 4095, respectively.
At default, VCI is set to 0.
PPP User Name: The name of the Internet account provided by your ISP.
PPP Password: The password you use to access your ISP account.
OAM F5 Timer: The Operations and Maintenance (OAM) F5 Timer feature transmits
loopback cells to the remote peer according to the specified period. Note that
the local peer will always respond to a loopback cell that is transmitted by the
remote peer. If the OAM F5 timer is set to 0, then no loopback cell will be sent
to the remote peer.
12 June, 2002 AG2500Series Software User’s Guide
Basic - SETUP
NAT: Network Address Translation allows the AresGate to perform IP-sharing,
Remote IP: The IP address of the remote server provided by your ISP.
WAN IP: AresGate’s WAN IP address provided by your ISP.
Subnet Mask: AresGate’s subnet mask provided by your ISP.
When you are ready, click Submit to save the configuration to your AresGate device. If you do wish to
save configuration, click Cancel.
which means multiple PCs on your LAN with private IP addresses can share
Internet access using one public IP address.
AG2500Series Software User’s Guide June, 2002 13
4.3 Basic - WIRELESS
Basic - WIRELESS
Figure 4.2 WIRELESS Page
The WIRELESS page provides the configuration parameters for AresGate's wireless feature. It contains the following settings:
SSID (Service Set ID)
The SSID is an unique identifier that AresGate and wireless clients use to associate with each other.
The SSID can be any alphanumeric entry up to 32 characters long and is case sensitive. The default
SSID is AG2500.
Radio Transfer Speed
The radio transfer speed is the data rate that AresGate uses to connect to a wireless client. You can
choose the wireless data transfer rate of the AresGate ranging from 1, 2, 5.5 to 11M bps. AresGate will
always attempt the selected speed to link to wireless clients. If a link cannot be established because of
interference or other obstacles, AresGate gears down the speed to the next lowest rate until a link is
successfully established. The default radio transfer speed is 11M bps.
14 June, 2002 AG2500Series Software User’s Guide
Basic - WIRELESS
Wireless Channel Number
A wireless channel number is a specific frequency band at which AresGate communicates with a client. You can select one of the 11 channels from the drop-down menu for the AresGate to use. However,
if you enable the Auto-Channeling feature, the channel you selected here will be ignored by the system. Instead, it will be replaced by the channel number that the system selected.
Auto-Channeling
When you turn on the Auto-Channeling feature, AresGate automatically scans the surrounding radio
signals, selects the least interference and lowest traffic channel to use, and displays this selected channel in the above Wireless Channel Number. The default setting of this feature is Off.
NOTE: Turning on the Auto-Channeling feature may cut off the wireless connection between AresGate and
your PC. Click Re-Scan in the Wireless Configuration Utility program installed in your PC to re-estab-
lish the wireless connection.
WEP (Wired Equivalent Privacy)
The Wired Equivalent Privacy (WEP) is used to protect wireless communication from eavesdrop-
ping. Since WEP uses a secret key shared between the communicators, if you enable the WEP feature,
entering the WEP key values below is required.
Default WEP Key
AresGate supports 40-bit and 128-bit WEP keys. For 40-bit WEP encryption, you need to enter 10
hexadecimal digits in one of the key fields below. For 128-bit WEP encryption, you need to enter 26
hexadecimal digits in one of the key fields below. Although there are four key fields you can set up for
AresGate, you can choose only one at a time from the Default WEP Key drop-down menu. The WEP
key is not case-sensitive. The default key field is 1.
1. Enter either 40-bit WEP keys as 10 HEX digits or 128-bit WEP keys as 26 Hex digits
here.
2. Enter either 40-bit WEP keys as 10 HEX digits or 128-bit WEP keys as 26 Hex digits
here.
3. Enter either 40-bit WEP keys as 10 HEX digits or 128-bit WEP keys as 26 Hex digits
here.
4. Enter either 40-bit WEP keys as 10 HEX digits or 128-bit WEP keys as 26 Hex digits
here.
Click Save to save the values to your AresGate. If you do not wish to save the configuration, simply
click Cancel.
AG2500Series Software User’s Guide June, 2002 15
4.4 Basic - AUTHENTICATION
Basic - AUTHENTICATION
Figure 4.3 AUTHENTICATION Page
The AUTHENTICATION page allows you to configure AresGate to establish communication with a
RADIUS server for the purpose of user authentication and accounting. If the user passes the authentication, then the user is allowed access to the network and service that AresGate provides. It performs both
MAC address and EAP (Extensible Authentication Protocol) authentication automatically for all the
associated wireless clients. MAC address authentication is based on user's MAC address of his/her
wireless device for authenticating while EAP authentication is based on the username and password.
16 June, 2002 AG2500Series Software User’s Guide
Basic - AUTHENTICATION
MAC address authentication is performed first. If the MAC address is not in the RADIUS server or
local SOHO profile, then EAP authentication is performed. The user is REQUIRED to input the username and password for authentication purpose.
There are three options for you to choose:
If you select No Authentication, AresGate will not perform the authentication process.
If you select Authentication by Radius, AresGate will perform the authentication process through an
external RADIUS (Remote Authentication Dial-In User Service) server. Please follow the steps below
to set up the RADIUS server:
Step 1. Enter the maximum number of users allowed to access the AresGate in the Max users (0-64) field.
Step 2. Enter the IP address of the authentication server in the IP Address field of the Authentication Server
section.
Step 3. Enter the port number of the authentication server in the Port field. The default port number is 1812.
Step 4. Enter the shared secret key used by the authentication server in the Secret Key field.
Step 5. Repeat Steps 1 - 4 for the Accounting Server section. The default port number of the accounting
server is 1813.
If you select Authentication by local SOHO profile, then enter the username, password, Max Session
Time (min), and Max Idle Time (sec). Even though no back-end server is needed, however, the maximum number of clients allowed is now reduced to 12 only.
When you are ready, click Submit to save the values to your AresGate. If you do not wish to save the
configuration, simply click Cancel.
AG2500Series Software User’s Guide June, 2002 17
4.5 Basic - DHCP
Basic - DHCP
Figure 4.4 DHCP Page
The DHCP page allows you configure the DHCP feature and assign or reserve IP addresses. At default,
the DHCP feature is set to On. There are three options for you to choose:
If you select Relay On, then you have activated AresGate’s DHCP relay feature. It is necessary for you
to configure a DHCP server’s IP address in the DHCP Server field to allow DHCP packets to forward
properly.
If you select Server Off, then you have de-activated AresGate’s DHCP server feature.
If you select Server On, then you have activated AresGate’s DHCP server feature for automatic assignment of IP addresses, subnet mask, gateway IP address, and DNS to the DHCP clients. Please follow
the steps below for a complete DHCP setup:
Step 1. Enter the LAN IP address of the AresGate in the IP Address field under LAN Settings. The default
LAN IP address is 192.168.10.1.
Step 2. Enter the subnet mask of the AresGate in the Subnet Mask field under LAN Settings. The default LAN
subnet mask is 255.255.255.0.
Step 3. Enter the amount of time that a network device can have (lease) a private IP address before AresGate
makes the IP address available for re-assignment in the Lease Time (Hour) field.
18 June, 2002 AG2500Series Software User’s Guide
Basic - DHCP
Step 4. If you wish to specify a pool of IP addresses that can be dynamically assigned as private IP addresses,
you can enter an IP address in the Start IP field as the beginning and another IP address in the End IP
field as the end of the IP range.
NOTE: The IP Pool feature for the DHCP server is based on the LAN IP address settings. Therefore, you must
first configure a LAN IP address and subnet mask in the above LAN Setting section before using
DHCP.
Step 5. When you are finished with the DHCP configuration, click Save.
4.5.1 Reserved IP Table
The Reserved IP Table displays all the private IP addresses that are reserved by the user for other
usages. To reserve a new private IP address, simply enter the IP address in the Reserved IP field and
click Add. To remove an IP address from the Reserved IP Table, enter the IP address and click Delete.
AG2500Series Software User’s Guide June, 2002 19
4.6 Basic - USER STATUS
Figure 4.5 USER STATUS Page
The USER STATUS page displays the current logon user status and contains the following informa-
tion:
4.6.1 Current Log-on User Status
Index: A serial ID number, which is assigned by the system, for logon users.
User: It displays user’s identification as MAC address for MAC authenticated user or
username for EAP authenticated user.
Connection Time: It indicates the connection time of the service from the beginning of the
session.
Max Idle Time: When the idle data traffic time exceeds the maximum idle time configured by a
central RADIUS server, AresGate stops its service and ends session.
Max Session Time: It shows the time that the user is allowed to use the service.
Basic - USER STATUS
20 June, 2002 AG2500Series Software User’s Guide
Basic - STATUS
4.7 Basic - STATUS
Figure 4.6 STATUS Page
The Status page displays AresGate’s network statistics and general system information.
System
System Name: AresGate device name used for identification purpose.
Location: The location name where AresGate is installed.
Firmware Version: Current installed firmware version number.
Firmware Date: The firmware release date.
Ethernet LAN
IP Address: The IP address of AresGate’s Ethernet port.
Subnet Mask: The subnet mask of AresGate's Ethernet port.
MAC Address: The MAC address of AresGate's Ethernet port.
Status: The current LAN connection status.
AG2500Series Software User’s Guide June, 2002 21
Ethernet Port Statistics
Received Packets: The total number of packets received on the Ethernet port.
Transmit Packets: The total number of packets transmitted on the Ethernet port.
Overrun Packets: The total number of receiver overruns.
Underrun Packets: The total number of transmitter underruns.
Receive Loss Packets: The total number of packets lost.
Receive Bad Bytes: The total number of bad bytes received.
Packets Truncated: The total number of truncated packets received.
Packet CRC Errors: The total number of packets received with an incorrect CRC.
ADSL
DSP Firmware:
Vendor ID:
SNR:
Attenuation:
Lcl Tx Power:
Line Mode:
Upstream:
Downstream:
Basic - STATUS
Wireless LAN
Wireless Link: Indicates whether or not there is a valid wireless connection between AresGate
and other PCs.
SSID: Displays the SSID of the AresGate device.
Channel Number: Displays AresGate’s current wireless channel number.
Transmit Packets: The total number of packets transmitted on the wireless interface.
Transmit Bytes: The total number of bytes transmitted on the wireless interface.
Received Packets: The total number of packets received on the wireless interface.
Received Bytes: The total number of bytes received on the wireless interface.
22 June, 2002 AG2500Series Software User’s Guide
Advanced - ADMINISTRATION
4.8 Advanced - ADMINISTRATION
Figure 4.7 ADMINISTRATION Page
To ensure AresGate’s maximum administrative security, the ADMINISTRATION page in the
advanced section allows you to enter a desired username and password.
Reboot: Click this button to reboot AresGate remotely. It acts the same as the power
Reset: Click this button to restore AresGate to manufacturer default conditions.
4.8.1 Administration
User Name: Enter a desired username to set up administrator authorization for the
Password: By entering a desired password, it provides maximum security for your
Re-enter Password: Enter your password again to make sure that you have typed in the correct
System Name: Enter a desired device name for the AresGate for identification purpose.
Location: Enter the location name where the AresGate is installed.
Gateway IP Address: Enter AresGate’s Gateway IP Address provided by your ISP.
switch on the back of the unit.
management system. It can be any alphanumeric code up to 32 characters
long. The default username is admin.
AresGate by limiting access only to users with the correct password. The
password can be any alphanumeric code up to 32 characters long. The default
password is admin.
When you type in your password, it will appear as asterisk (****).
password.
AG2500Series Software User’s Guide June, 2002 23
Advanced - ADMINISTRATION
Primary DNS: Allows you to assign the IP Address of the Primary DNS provided by your ISP.
Secondary DNS: Allows you to assign the IP Address of the Secondary DNS provided by your
ISP.
When you are ready, click Save to save the values to your AresGate. If you do not wish to save the configuration, simply click Cancel.
24 June, 2002 AG2500Series Software User’s Guide
Advanced - IP ROUTING
4.9 Advanced - IP ROUTING
Figure 4.8 IP ROUTING Page
Use the IP ROUTING page to create paths or routes for AresGate to forward data packets to their destinations. You need to create an IP route when there are other routers on your LAN.
4.9.1 Current IP Routing Table
The Current IP Routing Table displays the index number (ID), Destination IP Address, Subnet Mask,
Gateway IP Address, and Interface for each IP route entry.
4.9.2 Add Route
Destination IP Address: The IP address of where data packets are to be sent.
Subnet Mask: The subnet mask of the above Destination IP Address.
Gateway IP Address: The IP address of the router on the LAN where data packets are to be sent. The
Gateway IP Address can only be set if the route uses the LAN interface.
Interface: Determines data packets are to be sent through the Ethernet_LAN or WAN
interface.
When you are ready, click Add to enter a new IP route to the Current Routing Table.
4.9.3 Delete Route
Route ID: To delete a route from the routing table, enter the associated ID number and
click the Delete button. Click Cancel if you do not wish to save configuration.
AG2500Series Software User’s Guide June, 2002 25
4.10 Advanced - SNMP
Advanced - SNMP
Figure 4.9 SNMP Page
Use the SNMP (Simple Network Management Protocol) page to add or delete SNMP entries. This
page also lists all the SNMP entries in AresGate.
If you select SNMP Off, then you are disabling the SNMP feature.
If you select SNMP On, then you are enabling the SNMP feature, and you must enter a valid SNMP
server IP address in the SNMP IP field. When you are done, click Save.
4.10.1Current SNMP Table
The Current SNMP Table provides the current SNMP entry’s information including the entry’s ID
number, community string and access rights. There are two default entries: public and private.
26 June, 2002 AG2500Series Software User’s Guide
Advanced - SNMP
4.10.2Add SNMP Entry
Community: Allows you to enter the SNMP string.
Read: Allows you to enable or disable the Read function on this community.
Write: Allows you to enable or disable the Write function on this community.
Click Add/Edit to add a new entry or edit an existing entry in the Current SNMP Table.
4.10.3Delete SNMP Entry
SNMP Entry ID: Enter the associated ID number that you want to remove from the table. The
last SNMP entry cannot be deleted.
Click Delete to remove this entry from the SNMP table. Click Cancel if you do not wish to save configuration.
AG2500Series Software User’s Guide June, 2002 27
4.11 Advanced - UPGRADE
Figure 4.10 UPGRADE Page
Use the UPGRADE page to update AresGate's firmware from a FTP (File Transfer Protocol) server.
You can perform firmware upgrade by following the steps below:
Advanced - UPGRADE
Step 1. In the FTP Server IP Address field, enter the IP address of the FTP server where the new firmware file
is located. The default FTP server IP address is 63.197.240.8. The FTP server should allow anonymous
login.
Step 2. In the File Name field, enter the file name of the new firmware that you want to load and install. Please
check ARESCOM website for the latest firmware filename.
NOTE: The firmware image file must be placed in the root directory of the FTP file server.
Step 3. Click Upgrade to begin the firmware upgrade process. When the upgrade is complete, AresGate will
reboot automatically. Click Cancel if you do not wish to upgrade the unit.
28 June, 2002 AG2500Series Software User’s Guide
CHAPTER 5: TROUBLESHOOTING
5.1 FAQ
Symptom Possible Cause Resolution
Make sure the RJ-11 phone
The DSL LED
blinks continuously and never
stays solid on.
Ethernet LAN
LED not turned
on after Ethernet
cable is connected.
Unreachable
through Ethernet.
Unable to browse
the Internet
because authentication failed.
RJ-11 phone cable loose or
not connected properly.
RJ-11 phone cable defective. Replace RJ-11 phone cable.
The phone cable is wired
incorrectly.
Ethernet/LAN cable loose or
not connected properly.
Ethernet/LAN cable defective.
Incorrect cable.
The following are indicated
by no link at both ends:
• A crossover cable was
used when a straightthrough was required or
vice-versa.
• The cable is wired
incorrectly.
Your PC’s Ethernet NIC IP
address and the LAN IP
address of the unit are not in
the same subnet.
Ethernet cable loose or not
connected properly.
Incorrect username and password (EAP authentication
failed).
Incorrect MAC address
(MAC authentication failed).
Unregistered users.
cable is plugged into the back
panel of the unit and the other
end into the phone wall jack.
Make sure the pair of the
phone line on which the DSL
service is activated is on the
inside wire pair of the RJ-11
phone jack.
Reconnect the Ethernet cable
into the Ethernet/LAN port.
Replace the Ethernet/LAN
cable.
For the correct pinouts of
crossover or straight-through
cable, please refer to Appen-
dix C.
Change your PC’s Ethernet IP
address.
Reconnect the Ethernet cable
into the Ethernet port.
Contact your service provider
to make sure you have correct
username and password.
Contact your service provider
to make sure your WLAN
device is assigned with an
authenticated MAC address.
Go to the registration web
page for registration or contact
your ISP.
AG2500Series Software User’s Guide June, 2002 29
FAQ
30 June, 2002 AG2500Series Software User’s Guide
APPENDIX A: TECHNICAL SPECIFICATIONS
A.1 Hardware Specifications
WAN Interface
ADSL Interface:
• One ADSL port (RJ-11).
• ADSL Line Code: Support ANSI T1.413 Issue 2, ITU-T G.992.1 (G.DMT),
and ITU-T G.992.2 (G.Lite).
ADSL Data Rate:
• ANSI T1.413: Up to 8 Mbps downstream and up to 1024 Kbps upstream
operating at full rate connection.
• G.DMT: Up to 8 Mbps downstream and up to 1024 Kbps upstream operating
at DMT full rate connection.
• G.Lite: Up to 1.5 Mbps downstream and up to 1024 Kbps upstream operating at G.lite connection.
Wired LAN Interface
• One Ethernet 10BaseT (IEEE 802.3) port (RJ-45)
Wireless LAN Interface
• IEEE 802.11b High Rate compliant
• Operating in the unlicensed 2.4GHz ISM band
• Operation Frequency/Channels (Either one below)
- North America/FCC: 2.412~2.462 GHz (11 channels)
- Europe/ETS: 2.412~2.472 GHz (13 channels)
- Japan/TELEC: 2.412~2.472 GHz (14 channels)
• Modulation Technique: Direct Sequence Spread Spectrum (CCK, DQPSK,
DBPSK).
• Dynamic Rate Shifting: 11, 5.5, 2 and 1Mbps.
• Media Access Protocol: CSMA/CA with ACK.
• Security Management: 40-bit, 128-bit WEP (wired equivalent privacy)
Encryption.
• Maximum Output Power: 17dBm (50mW).
Antenna
• Removable 3-dBi diversity high gain dipole antenna LEDs.
LEDs
•PWR
•DIAG
•WAN
•LAN
•WLAN
AG2500Series Software User’s Guide June, 2002 31
Mechanical
• Dimensions: 8” (w) x 5.75” (d) x 1.5” (h).
• Weight: 1.5 lbs.
Operating Environment
• Operating temperature: 0°C to 40°C (32°F to 104°F).
• Operating humidity: 0% to 95% non-condensing.
Power
External AC Power Adapter
• Input: 230V 85mA or 120V 155mA, 47-60 Hz.
• Output: 13.5V AC, 1A.
• Power consumption: 8.5 watts nominal.
Compliance / Regulatory
• EMI: FCC Part15 Class B & Part 15C, CE EN55022 Class B.
• Telecom: FCC Part 68.
• Wi-Fi Certified.
• Immunity: CE EN55024.
• Safety: CE EN60950.
32 June, 2002 AG2500Series Software User’s Guide
A.2 Software Features
Authentication
802.1x Authentication
• EAP/ MD5 (PPP Extensible Authentication Protocol, RFC 2284) mechanism for authentication.
• RADIUS server (RFC2865, RFC 2869).
• RADIUS Accounting (RFC 2866).
MAC Authentication
• Authentication through the client's MAC address (RFC 2865).
Web Re-direction
• Unauthorized users automatically re-direct to a configured web page for registration.
Radio Control
Automatic Channel Selection
Date Rate Selection
Roaming
RADIUS
Routing
• Automatically selects the optimal channel for minimal radio interference from other nearby
APs.
• ON/OFF selectable.
• Manually selects data rates from 1Mbps, 2Mbps, 5.5Mbps and 11Mbps.
• IEEE 802.11b High Rate compliant.
• Automatic account roll-over.
• Up to two RADIUS authentication servers: Authentication and Accounting Servers.
• Configured port number and accounting port number.
• TCP/IP (RFC791, RFC792, RFC793), ARP (RFC826).
• Static routing on the LAN and/or WAN.
• Dynamic routing protocol supports RIP1 (RFC1058), RIP2 (RFC1723).
AG2500Series Software User’s Guide June, 2002 33
DHCP
• DHCP server (RFC 2131,RFC2132): automatic to assign IP address, Subnet Mask, Gateway,
and DNS to workstations.
• DHCP relay.
• DHCP pass-through.
Bridging
• IEEE 802.1d-compliant transparent bridging between wireless interface and wired LAN interface.
• Bridge Filters – Up to 32 filter entries, MAC address criteria setup.
• Supports up to 510 MAC learning addresses.
• RFC1483-bridged (LLC or VC MUX encapsulation) over ATMPVC.
Internet Access Sharing
• NAT/PAT (RFC1631) proxy supports unlimited multi-user sharing via Ethernet LAN.
• NAT (Network Address Translation) supports PAT (Port Address Translation) for Web server
hosting, multimedia applications, and Internet gaming.
• NAT supports PPTP and IPSec VPN pass through.
Security
• IEEE 802.1X port-based network access control.
• PAT (RFC1334), CHAP (RFC1994), and MS-CHAP user authentication.
• Username and password control for network management access.
• WEP (Wired Equivalent Privacy): 40/128-bit encryption keys and SSID.
Network Management
Access Interfaces
• Web browser-based manager.
• Command Line Interface through RS-232 console port.
• Telnet support.
• SNMP (Simple Network management Protocol): RFC1157.
SNMP
• MIB II (RFC1213).
• Wireless MIB (IEEE 802dot11).
•Private MIB.
• SNMP traps (RFC1215).
34 June, 2002 AG2500Series Software User’s Guide
Functions
• Device configuration.
• Firmware upgrade available via FTP or locally.
• Real time status display and event report and Syslog.
• Remote reboot (hardware) and reset.
NOTE: Product specifications are subject to change without prior notice.
AG2500Series Software User’s Guide June, 2002 35
36 June, 2002 AG2500Series Software User’s Guide
APPENDIX B: SNMP SPECIFICATIONS
AresGate device follows the IETF standard RFC1213. Currently the standard MIB-II
is implemented in all but the following three groups:
• Egp OBJECT IDENTIFIER ::= {mib-2 8}
• Transmission OBJECT IDENTIFIER ::= {mib-2 10}
• snmp OBJECT IDENTIFIER ::= {mib-2 11}
B.1 Standard Bridge MIB
AresGate supports standard bridge MIB (root: 1.3.6.1.2.1.17) as specified in
RFC1493. The following is the OID list:
1.1 Dot1DBaseBridgeAddress, String, Read Only
1.2 Dot1DBaseNumPorts, Integer, Read Only
1.3 Dot1DBaseType, Integer, Read Only
1.4.1.1 Dot1DBasePort, Integer, Read Only
1.4.1.2Dot1DBasePortIfIndex, Integer, Read Only
1.4.1.3Dot1DBasePortCircuit, ObjID, Read Only
1.4.1.4 Dot1DBasePortDelayExceededDiscards, Counter, Read Only
1.4.1.5 Dot1DBasePortMTUExceededDiscards, Counter, Read Only
4.1 Dot1DTPLearnedEntryDiscards, Counter, Read Only
4.2 Dot1DTPAgingTime, Integer, Read Only
4.3.1.1 Dot1DTPFDBAddress, String, Read Only
4.3.1.2 Dot1DTPFDBPort, Integer, Read Only
4.3.1.3 Dot1DTPFDBStatus, Integer, Read Only
4.4.1.1 Dot1DTPPort, Integer, Read Only
4.4.1.2 Dot1DTPPortMaxInfo, Integer, Read Only
4.4.1.3 Dot1DTPPortInFrames, Counter, Read Only
4.4.1.4 Dot1DTPPortOutFrames, Counter, Read Only
4.4.1.4 Dot1DTPPortInDiscards, Counter, Read Only
5.1.1.1Dot1DSTATICAddress, String, Read Only
AG2500Series Software User’s Guide June, 2002 37
5.1.1.2 Dot1DSTATICReceivePort, Integer, Read Only
5.1.1.3 Dot1DSTATICAllowedToGoto, String, Read Only
5.1.1.4 Dot1DSTATICStatus, Integer, Read Only
NOTE: ADSL and ATM stand MIBs will be supported in later version.
B.2 Private MIB Implememtation
AresGate also supports wireless MIB (IEEE 802dot11) and private MIB.
B.2.1 Terminalogy
This section presents the syntax and access type categories used to describe each variable. For details
on syntax, refer to RFC 1155 and RCF 1442 for SNMPv2.
Syntax
Syntax describes the format of the information, or value, that is returned upon monitoring or setting
information in a device with a MIB variable.
Syntax can be any one of the following categories:
TruthValue
An integer of 1 or 2, where 1 = true and 2 = false.
TruthValue is defined in "Textual Conventions for version 2 of the Simple Network Management Protocol (SNMPv2)," RFC 1443.
Counter/Counter32
A counter is a nonnegative integer that increases until it reaches some maximum value. After reaching
the maximum value, it rolls back to zero.
String
A string is a printable ASCII string. It is typically a name or description. For example, the variable SysName specifies the readable name for a device.
Integer
An integer is a numeric value. It can be an actual number, for example, the number of lost IP packets on
an interface. It also can be a number that represents a nonnumeric value. For example, the variable
ReservedIPNum returns the number of reserved IP addresses of a DHCP service to SNMP manager.
Integer32
An integer from -2 31 to 2 31 -1.
38 June, 2002 AG2500Series Software User’s Guide
TimeStamp
TimeStamp is defined in RFC 1443 as the value of the MIB-II sysUpTime object at which a specific
event occurred.
IP address
The variable indicates the IP address.
Timeticks
Timeticks is a nonnegative integer that counts the hundredths of a second since an event.
Max-Access
This variable, which applies to SNMPv2, can represent one of the following four states:
Read-Create
• read-create
• read-write
• read-only
• not-accessible.
This specifies a tabular object that can be read, modified, or created as a new row in a table.
Read-Write
You can read or modify this variable.
Read-Only
This variable can only be used to monitor information.
Not-Accessible
You cannot read or write to this variable. Entry statements are typically among those variables that are
not accessible.
B.2.2 MIB Description
System Group (1.3.6.1.4.1.5139.2.1)
1.1 SysName
SYNTAX: String
ACCESS: Read-write
DESCRIPTION: Specifies the readable name for this unit
AG2500Series Software User’s Guide June, 2002 39
1.2 SysModel
SYNTAX: String
ACCESS: Read-only
DESCRIPTION: Specifies the model name for this unit
1.3 SysVersion
SYNTAX: String
ACCESS: Read-only
DESCRIPTION: The version number of firmware and boot-code or hardware
1.4 SysDate, string, Read Only
SYNTAX: String
ACCESS: Read-only
DESCRIPTION: System firmware Built Date
2.1 DNSEnable
SYNTAX: Integer
ACCESS: Read-Write
DESCRIPTION: Enable(1) or disable(0) the Domain Name Service relayed by this unit
2.2 DNS1
SYNTAX: IP address
ACCESS: Read-Write
DESCRIPTION: Designated IP address of Domain Name Server 1
2.3 DNS2
SYNTAX: IP address
ACCESS: Read-Write
DESCRIPTION: Designated IP address of Domain Name Server 2
40 June, 2002 AG2500Series Software User’s Guide
3.1 DHCPEnable
SYNTAX: Integer
ACCESS: Read-Write
DESCRIPTION: Enable(1) or disable(0) the DHCP server function on this unit
3.2 DHCPLeaseTime
SYNTAX: Integer
ACCESS: Read-Write
DESCRIPTION: DHCP IP address leased time
3.3 ReservedIPNum
SYNTAX: Integer
ACCESS: Read-only
DESCRIPTION: Number of reserved IP addresses
3.4.1.1ReservedIPAddr
SYNTAX: IP address
ACCESS: Read-only
DESCRIPTION: IP address reserved
3.5 IPPoolNum
SYNTAX: Integer
ACCESS: Read-only
DESCRIPTION: Number of IP pools used for DHCP IP addresses assignment
3.6.1.1PoolStartIP
SYNTAX: IP address
ACCESS: Read-only
DESCRIPTION: The first IP address of the IP pool
AG2500Series Software User’s Guide June, 2002 41
3.6.1.2PoolEndIP
SYNTAX: Integer
ACCESS: Read-only
DESCRIPTION: The last IP address of the IP pool
4.1 Reserved
4.2 Reserved
4.3 Reserved
4.4 SysRIPEnable
SYNTAX: Integer
ACCESS: Read-Write
DESCRIPTION: Global RIP status
0: disable
1: enable
Interface Group (1.3.6.1.4.1.5139.2.2)
1.1 IfNumber
SYNTAX: Integer
ACCESS: Read-only
DESCRIPTION: Number of System Interface
1.2.1.1IfIndex
YNTAX: Integer
ACCESS: Read-only
DESCRIPTION: Index of system interface
42 June, 2002 AG2500Series Software User’s Guide
1.2.1.2IfName
SYNTAX: String
ACCESS: Read-only
DESCRIPTION: Interface Name of each individual system interface as shown by "show interface summary" command
1.2.1.3PrimaryIP
SYNTAX: IP address
ACCESS: Read-only
DESCRIPTION: An interface may have multiple IP addresses, this is the primary IP address of each
interface.
1.2.1.4PrimaryMask
SYNTAX: IP address
ACCESS: Read-only
DESCRIPTION: Subnet mask of the primary IP address of each interface
1.2.1.5DestIP
SYNTAX: IP address
ACCESS: Read-only
DESCRIPTION: The peer's IP address if the interface is connecting to the peer by PPP protocol.
1.2.1.6Reserved
1.2.1.7NATEnable
SYNTAX: Integer
ACCESS: Read-Write
DESCRIPTION: Enable(1) or disable(1) the NAT function on the interface
AG2500Series Software User’s Guide June, 2002 43
1.2.1.8NATIP
SYNTAX: IP address
ACCESS: Read-Write
DESCRIPTION: The designated IP address used to execute the NAT on the interface
44 June, 2002 AG2500Series Software User’s Guide
APPENDIX C: CABLE AND CONNECTORS
C.1 Connector Specifications
C.1.1 10/100 Ports
The 10/100 Ethernet ports use standard RJ-45 connectors and Ethernet pinouts with
internal crossovers, as shown by an X in the port name. These ports have their transmit (Tx) and receive (Rx) signals internally crossed so that a straight-through Ethernet cable and an adapter can be attached to the port. The figure below shows the
pinouts:
Pin Label 1 2 3 4 5 6 7 8
1Tx+
2Tx3Rx+
4NC
5NC
6Rx7NC
8NC
C.2 Cable Specification
C.2.1 RJ-45
RJ-45 to RJ-45 Straight-through Ethernet Cable
RJ-45 to RJ-45 Crossover Ethernet Cable
AG2500Series Software User’s Guide June, 2002 45
46 June, 2002 AG2500Series Software User’s Guide
APPENDIX D: GLOSSARY
802.1X An IEEE standard for local and metropolitan area networks,
called Port-based Network Access Control. It is used to
securely establish an authenticated association between the
client and the AP.
AP (Access Point) A hardware device, or software used in conjunction with a
computer, that serves as a communications “hub” for
wireless clients and provides a connection to a wired LAN.
An AP can double the range of wireless clients and provide
enhanced security.
Ad-Hoc Mode A client setting that provides independent peer-to-peer
connectivity in a wireless LAN. An alternative set-up is
where PCs communicate with each other through an AP (see
also Infrastructure Mode).
Bandwidth The amount of data that can be transmitted by the network
“information highway”, used as an indication for speed of
data transmission. An Ethernet link is capable of moving 10
million bits of data per second.
Bit The term used to refer to a single unit of data in digital data
communications. It takes 8 bits to make 1 byte, which is a
unit of measurement for computer data.
Bps (Bits per second) Refers to the unit of measurement used for data transmission
speeds over a data communication link.
Bridge A hardware device that passes packets between multiple
network segments using the same networking protocol to
connect the different network segments. Bridge operates at
the hardware layer and has no routing capabilities.
Broadband Any high-bandwidth (see also Bandwidth) data
communication technology that runs at speeds of 200 Kbps
or more and allows combined transmission of voice, data,
and video over a single physical connection. Broadband is in
contrast to narrowband such as traditional 56K analog
modem. DSL, Cable, wireless, and satellite technology are
all different types of broadband technology.
Byte A unit of data equaling to 8 bits (1 Byte = 8 bits).
DHCP (Dynamic
Host Configuration
Protocol) An Internet protocol that allows the DHCP server to
dynamically assign IP addresses to any client workstation
(any device connected to your LAN, such as a PC) for a set
period of time and then sends them back so that they can be
reassigned to other workstations. This feature saves the ISP
and Network Managers from having to manually configure
IP addresses for each PC on the LAN.
DNS (Domain Name
System) A mechanism that translates host domain names into its
numeric IP Address and vice-versa. A domain name is an
easy-to-remember nickname for numerical IP addresses
required by a computer, such as janedoe@arescom.com.
AG2500Series Software User’s Guide June, 2002 47
Encapsulation The encapsulating or enclosing data within a particular IP header. Sometimes
the entire frame from one network is placed in the header used by the data link
layer protocol of another network.
Encryption A specific algorithm used to encrypt or encode the data so that it becomes
unreadable to unauthorized users that do not know the decryption key. A good
example of encryption technology is WEP (Wired Equivalent Private).
Ethernet Most popular LAN (Local Area Network) technology that uses CSMA/CD
(Collision Detection) and transfers data between workstations over a variety of
cable types at 10Mbps, also called 10BaseT. Most Ethernet LANs use twisted
pair 10BaseT cables and support both Ethernet as well as Fast Ethernet at
100Mbps (100BaseT).
Firewall A security device (either hardware, software, or a combination of both) that
selectively blocks out or filters unwanted IP traffic from a public network.
Firewall allows the private LAN network to be invisible to the public network
outside, preventing intrusion from unauthorized users.
Hub A hardware device that repeats all data traffic to all CPE (Customer Premises
Equipment) ports. A hub functions as the center of a LAN and all other
network devices on the LAN, including PCs, printers, DSL modem or
Gateways, are connected to the hub through cabling.
Infrastructure Mode A client setting providing connectivity to an AP. As compared to Ad-Hoc
Mode, where PCs communicate directly with each other, clients set in
Infrastructure Mode all pass data through a central AP. The AP not only
mediates wireless network traffic in the immediate neighborhood, but it also
provides communication with the wired network (see also Ad-Hoc Mode and
Access Point).
Internet A massive worldwide network of computer networks interconnecting
thousands of computers and networks around the world and readily accessible
from any computer with a modem or router connection and the corresponding
software.
IP (Internet Protocol) A protocol standard for the Internet. A kind of Internet software that keeps
track of all the addresses on the Internet for different nodes, forwards outgoing
IP traffic, and recognizes incoming IP traffic.
IP Address Numeric address assigned to each machine on the Internet. Consists of four
sets of one, two, or three octal digits separated by periods.
ISP (Internet
Service Provider) The telecommunication company that provides Internet service for the
subscriber. The ISP can be a telephone company, a CLEC or ILEC, or any
other company that provides Internet access to the end user such as AOL,
Earthlink or MSN.
LAN (Local
Area Network) A collection of privately-owned, interconnected computers within a confined
service area.
WEP (Wired
Equivalent Privacy) WEP data encryption is defined by the 802.11 standard to prevent (i) access to
the network by “intruders” using similar wireless LAN equipment and (ii)
capture of wireless LAN traffic through eavesdropping. WEP allows the
administrator to define a set of respective “Keys” for each wireless network
user based on a “Key String” passed through the WEP encryption algorithm.
Access is denied by anyone who does not have an assigned key.
48 June, 2002 AG2500Series Software User’s Guide
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