Comtrend Corporation CT-500S User manual

CT-500S
ADSL Router
User’s Manual
Version F1.0 8/19/2002
261031-002P

ii
Preface
This manual is written for the following software version: AD6489 0814. It is
written for Web management. It is designed to provide information to network
administrators. It covers the installation, operation and applications of the ADSL
router.
Version Notes
This software was upgraded from software Version 0725, the following default settings have
been added:
1. For PPPoA (VC mux) PVC 8/65
2. For transparent bridging PVC 8/35
3. For RFC 1483 Routing PVC 87/80, WAN IP 172.16.1.1
4. DHCP (DNS 200.72.1.5)
Warning
 Before servicing or disassembling this equipment, always disconnect all
power and telephone lines from the device.
 Use an appropriate power supply and a UL Listed telephone line cord.
Specification of the power supply is clearly stated in Appendix A -
Specifications.

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Table of Contents
Part 1: Overview........................................1
Chapter 1 Introduction ...................................................... 1
1.1 Product Overview ................................................................ 1
1.2 Features ............................................................................ 1
1.3 Application ......................................................................... 2
1.4 Front Panel LED Indicators.................................................... 2
Chapter 2 Hardware Installation........................................ 3
2.1 Preparing for Installation ...................................................... 3
2.2 Installation ......................................................................... 4
Part 2: Console Management .................5
Chapter 3 Access by Console.............................................. 5
3.1 Conventions ....................................................................... 5
3.2 Console Access ................................................................... 6
3.3 Saving Parameters/ Rebooting .............................................. 7
Part 3: Web Management............................9
Chapter 4 Login via the Web Browser ................................ 9
4.1 IP Address.......................................................................... 9
4.2 Login Procedure ................................................................ 11
Chapter 5 Basic Configuration.......................................... 12
5.1 Change the Password......................................................... 12
5.2 ADSL Link Status............................................................... 13
5.3 WAN Setup....................................................................... 14
5.3.1 RFC 1483 Bridged.............................................................. 14
5.3.2 RFC 1483 Routed .............................................................. 16
5.3.3 PPPoE .............................................................................. 17
5.3.4 PPPoA.............................................................................. 19
5.3.5 MER ................................................................................ 20
5.4 LAN IP Address ................................................................. 21
5.5 Routing............................................................................ 22
5.5.1 Enable RIP ....................................................................... 23
5.5.2 Static route configuration ................................................... 23
5.6 Save................................................................................ 25
5.7 Reboot............................................................................. 25
5.8 Retrieve default settings..................................................... 26

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Chapter 6 Advanced Configuration................................... 27
6.1 ADSL Mode....................................................................... 27
6.2 NAPT (Port Translation)...................................................... 28
6.2.1 Add a NAPT ...................................................................... 29
6.2.2 Flush NAPT Entries ............................................................ 30
6.3 DHCP............................................................................... 30
6.3.1 Enable DHCP .................................................................... 30
6.3.2 Disable the DHCP .............................................................. 31
6.4 Boot P/DHCP Relay ............................................................ 31
6.5 SNMP .............................................................................. 32
6.5.1 Modifying SNMP Parameters................................................ 33
6.6 Configure ......................................................................... 34
6.6.1 Configure Interface............................................................ 34
6.6.2 DNS & Default Gateway: .................................................... 36
6.6.3 NAT................................................................................. 37
6.7 VCC................................................................................. 38
6.7.1 List IPoA .......................................................................... 39
6.7.2 Delete Encapsulation.......................................................... 40
6.7.3 Add a VCC........................................................................ 40
6.7.4 Delete a VCC .................................................................... 42
6.7.5 Show VCC quality .............................................................. 42
6.7.6 PPPoE .............................................................................. 42
6.8 PPPoA.............................................................................. 43
6.9 MER ................................................................................ 43
6.10 IGMP ............................................................................... 44
6.10.1 Add an IGMP entry ............................................................ 44
6.10.2 Delete an IGMP entry......................................................... 45
6.11 Bridging ........................................................................... 45
6.11.1 Bridge ............................................................................. 45
6.11.2 Spanning tree ................................................................... 48
6.11.3 View STP parameters ......................................................... 48
6.11.4 To configure STP parameters .............................................. 49
6.11.5 Enable/Disable STP............................................................ 49
6.12 Filtering ........................................................................... 50
6.12.1 List of filter entries ............................................................ 50
6.12.2 Add a filter entry ............................................................... 51
6.12.3 Delete a filter entry ........................................................... 51
6.12.4 Modify a filter entry ........................................................... 52
6.12.5 Flush filter entries ............................................................. 52
Chapter 7 Performance monitoring .................................. 53
7.1 ADSL Link Status............................................................... 53

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7.2 System statistics ............................................................... 54
7.2.1 Interface Statistics ............................................................ 54
7.2.2 TCP-IP ............................................................................. 55
7.2.3 DHCP-Lease ..................................................................... 56
7.3 ATM statistics ................................................................... 56
7.3.1 AAL5 ............................................................................... 56
7.3.2 Encapsulation ................................................................... 57
Chapter 8 Diagnostics ...................................................... 58
8.1 OAM Loopback .................................................................. 58
8.2 Ping ................................................................................ 59
Chapter 9 Adding a PVC ................................................... 60
Appendix A: Specifications ............................................... 64
Appendix B: Pin Assignments ........................................... 66

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1
Part 1: Overview
Chapter 1 Introduction
This chapter introduces the ADSL Router. It includes a product overview,
description of the products features and applications, and explains the functions
of the Front panel LED indictors.
1.1 Product Overview
The ADSL Router utilizes an ADI chipset to meet the specific needs of multiple
users at small/home offices and remote /branch offices. It provides one 10/100
BaseT Ethernet port to connect to a LAN. It can access the Internet; Corporate
LAN; or Video on demand, over one ordinary telephone line; at speeds of up to
eight Mbps. In addition, it supports up to eight virtual concurrent-connections, to
multiple destinations. The ADSL Router has full routing capabilities to
segment/route IP protocol, and it is capable of bridging other protocols. The ADSL
Router has the speed and stability to be used for multi-media applications; and it
can easily be configured and monitored from a web-browser (Internet Explorer,
Netscape).
1.2 Features
The ADSL Router is compact and high performance standalone unit. It supports or
provides:
 One 10/100 Base-T Ethernet port for LAN connection
 Bridge/Routing function
 Auto-negotiation rate adaptation
 AAL5 for ATM over ADSL
 UBR/CBR ATM services
 VC-based and LLC multiplexing
 Up to 8 VCs
 Embedded SNMP agent and RFC MIB II
 Web-based management
 OAM F5
 Static route/RIP/RIP v2 routing function
 Dynamic IP assignment and Network Address Translation

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1.3 Application
Figure 1-1 shows a possible application of the router.
Figure 1-1 Application
1.4 Front Panel LED Indicators
LED
Indicator Color Mode
Function
On Power is supplied to the router
Power Green
Off Power is not supplied
Off Normal operating status
Alert Red
On The ADSL link is not established
On An Ethernet link is established
Off An Ethernet link is not established
LAN Link
Green
Flash Activity over the Ethernet link
Flash ADSL link is training
On An ADSL link is established
ADSL Link Green
Off ADSL link not established
Flash Receiving or transmitting data over the
ADSL link
ADSL Act Green
Off Not receiving or transmitting data over the
ADSL link
A
DSL
(
G.DMT
)
POTS splitter shel
f
A
TM
PSTN
Micro filter
POTS splitter
ADSL
R
oute
r
ADSL
R
oute
r
DSLAM

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Chapter 2 Hardware Installation
2.1 Preparing for Installation
Installation requires the following equipment:
A VT-100 compatible terminal –
This terminal is essential to perform the initial configuration of the router.
Normally this is a terminal with a VT-100 emulation program, such as Telix.
An RS232 straight-through cable to connect to the Console Port-
An RS232, DB9-to-DB9 straight-through cable is required to connect the terminal
to the device.
An AC power adapter cord to connect to the Power jack-
A suitable AC-to-AC power adapter cord is shipped with the device. It is used to
provide the necessary power for the device’s operation.
RJ45 10/100BaseT Ethernet connector cable to connect to the LAN port:
An RJ45 LAN connector cable is used to connect the router to the Local Area
Network (LAN). A cross-over cable is used to connect the router to a PC, and a
straight-through cable is used to connect to a hub. The pin assignments of the
RJ45 connector are listed in Appendix B.
An RJ11 connector cable to connect to the LINE port–
An RJ11 connector cable is used to connect the router to the telephone line from
the telephone company. Refer to Appendix B for the pin assignments of the RJ11
connector.
Clip-on stands
Your router is shipped with two clip-on stands. It is recommended that you affix
these to your router and operate the router in a vertical-upright position, in order
to optimize the performance of your router.
Optional POTS splitter or micro filter
Pots splitters or micro-filters are available if required.

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2.2 Installation
Figure 2-2 illustrates connections to the router backplane connectors.
Figure 2-1 Installation
Caution: Always disconnect all telephone lines from the telephone wall-outlet
before servicing or disassembling this device.
STEP 1 Connect the power adapter to the power jack of the device, and
then plug the power adapter into the wall outlet.
STEP 2 Connect the LAN port to a PC with a cross-over RJ45 cable, or to
a hub with a straight-through RJ45 connector cable.
STEP 3 Connect the Console port to a VT-100 compatible terminal with
an RS232 straight-through cable.
STEP 4 Connect the LINE port to a POTS splitter or micro filter with an
RJ11 connector cable.
STEP 5 Affix the two clip-on stands to the bottom of the router and place
the router in an up-right position (this is strongly recommended
in order to optimize the router’s performance)
STEP 6 Turn on the power switch on the rear panel.
Note: If the device fails to power on, or it malfunctions, first verify that the
power supply is correctly connected, and then power it on again.

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Part 2: Console Management
Chapter 3 Access by Console
This chapter will introduce console management, if you wish to use the web to
manage your device you should see Part 3 of this manual. The web section can
also be referenced for more complete explanation of some parameters and
procedures. In the first section of this Chapter, the conventions used by the
console and by this manual to explain the console will be discussed. The second
part of the chapter will explain how to establish access by console.
3.1 Conventions
Manual Conventions
1. Characters inside a box indicate that they are keys that need to be pressed.
For example, Enter, represents “push the Enter key.”
2. Text highlighted in gray, represents text that you may see on the screen.
For example, Press Y or N
3. The user interface has a multi-level menu structure, the following style will
be used to indicate menu locations: 1.Basic> 4. LAN IP This example
shows that the LAN IP screen can be accessed form the main menu by
entering the following keys: 1 Enter ; and then 4 Enter.
4. Numbers inside round brackets indicate a menu location. For example
(1.4), indicates 1.Basic> 4. LAN IP.
CLI Interface Conventions
1. Values in round brackets are default or previously entered values. For
example (Enabled), represents a default value or previously entered value
of “enabled”.

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2. Values in square brackets represent the range of permissible values. For
example, [8~35], indicates that a value from 8 to 35 may be entered.
Pop-up messages
You are likely to see the following pop-up messages (messages are highlighted)
Mandatory, Enter Valid Value
This message indicates that a parameter must be entered.
Optional, Press Return To Skip
This message indicates that it is optional to enter a parameter.
Do You Wish To Submit These Values [Y/N] :
This message indicates that the entered parameters will be submitted.
3.2 Console Access
For access by console, the console PC should be installed with a standard VT-100
emulation program, such as HyperTerminal 5 or Telix. The following steps explain
how to establish the console session.
STEP 1 Start a standard VT-100 program such as HyperTerminal (Ver. 5 is
recommended), or Telix in the local terminal; and select an open
com port.
STEP 2 Enter the following port settings:
 Baud rate: 9600
 Data bits: 8
 Parity: none
 Stop bit: 1
 Flow control: none
STEP 3 You will be prompted to enter a User name and Password, enter root
for User name and 12345 for the Password.

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STEP 4 The first screen of the console interface will now display.
3.3 Saving Parameters/ Rebooting
After changing parameters, in order to ensure that they are retained after
rebooting or re-powering the router, you must save the parameters to flash
memory. These procedures can be performed by completing the following steps:
1. Enter the Basic menu, select 6. Save & reboot
2. Press Yto save, or Nto not save at the prompt: Do you wish to save (Y/N)?
3. Press Yto reboot, or Nto not reboot at the prompt: Do you wish to reboot
(Y/N)?

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4. Upon completion, you will see the Success message displayed.

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Part 3: Web Management
This section describes how to manage the router via a Web browser from the
remote end. You can use a web browser such as Microsoft Internet Explorer, or
Netscape Navigator. It is best to set your display resolution to 1024 x 768. To
change the resolution you can go to the Microsoft Windows control panel and click
on the Display icon, and change the display settings. You will find the display
settings there.
Chapter 4 Login via the Web Browser
4.1 IP Address
To log on to the device using a web browser, your workstation and the device
should both be on the same network segment. You can either modify the IP
address of your workstation to the same domain of the device, or modify the IP
address of the device to the same domain as your workstation.
You can modify the IP address of the device by using console mode (see Section
3.2), and follow the steps below:
STEP 1: Enter a console program and go to 1.Basic> 4. LAN IP
STEP 2: Change the IP address to the same domain as your workstation.
STEP 3: Save the settings to the flash and reboot the device.
Basic> 6.Save & reboot
STEP 4: Start your Internet browser with the new IP address.
You can modify the IP address of your PC by modifying its TCP/IP. Follow the steps
below:
STEP 1: Enter the TCP/IP screen and change the IP address to the domain of
192.168.1.x/24. You should choose an IP address from
192.168.1.132-192.168.1.254 to avoid conflict with IP addresses
reserved for the DHCP pool (192.168.1.3 to 192.168.1.131).

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STEP 2: Click OK to submit the settings.
STEP 3: Start your Internet browser with the default IP address 192.168.1.1.

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4.2 Login Procedure
To log on to the system from the Web browser, follow the steps below:
STEP1: Start your Internet browser.
STEP 2: Type the IP address for the router in the Web address field. For example,
if the IP address is 192.168.1.1, type http://192.168.1.1
STEP 3: You will be prompted to enter your user name and password. Type the
password, or if the password was not changed, type the default passwords. The
default USER name is root, and the default password is 12345.
STEP 4: After successfully logging in, you will reach the main menu.

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Chapter 5 Basic Configuration
From the Basic menu bar you can change passwords, configure the WAN/LAN
interfaces, set-up routing, save settings, reboot the device, and retrieve the
factory default settings.
5.1 Change the Password
To modify the password, click Change Password from the menu bar. Type the
old password and type the new password twice. Click Apply to submit the
settings.
If you change the password, make sure you keep a record of it in a safe place, as
you will require it next time you log-on.

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5.2 ADSL Link Status
To view the ADSL link status, click Link Status from the tool bar. The page
includes the following information:
ADSL Line Status Shows the current status of the ADSL line
ADSL Mode Shows the ADSL standard that is currently configured. The
standards are: MULTI, T1.413, G.DMT, and G.LITE.
Upstream Upstream data rate negotiated by DSL link (Kbit/s)
Downstream Downstream data rate negotiated by DSL link (Kbit/s)
Attenuation Current attenuation (dB) of both near end and far end.
SNR Margin Current SNR margin (dB)
HEC Number of ATM cells received with errors, since start of link.
Firmware The version number of the firmware
15 min ES counter Number of errored seconds for the current 15 minute period
CRC errors Number of errors per second since training
1 day ES counter Number of errored seconds for the current day

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5.3 WAN Setup
Click WAN Setup from the tool bar and configure the WAN interface for these
services: RFC1483 Bridged, RFC1483 Routed, PPPoE, PPPoA, and MER. The
following are the common settings to set up these services.
 VPI and VCI
 LLC Encapsulation: With LLC encapsulation, a link control header is added to
the Ethernet packet that identifies the protocol type (Ethernet). This allows
multiple protocols to be transmitted over the ATM Virtual Circuit.
 VC Multiplexing: With VC Multiplexing, no link control header is needed as
the ATM Virtual Circuit is assumed to be carrying a single protocol.
 Enable NAPT: NAPT or Network Address Port Translation is explained further
in section 6.2. This feature is available for RFC 1483 Routed, PPPoE, PPPoA,
and MER. It is enabled for PPPoE.
5.3.1 RFC 1483 Bridged
When using RFC 1483 style bridging, Ethernet frames are “bridged” over ATM
Virtual Circuits. The Ethernet frames are encapsulated using either LLC
Encapsulation or VC Multiplexing. With LLC encapsulation, a link control header is
added to the Ethernet packet that identifies the protocol type (Ethernet). This
allows multiple protocols to be transmitted over the ATM Virtual Circuit. With VC
Multiplexing, no link control header is needed as the ATM Virtual Circuit is
assumed to be carrying a single protocol. Since the Ethernet packets are bridged,
the router’s only responsibility is to pass the Ethernet packets to and from the
Internet Service Provider and the local network. The IP addresses of the local
network are assigned by the ISP either statically or dynamically.
To set up the RFC 1483 Bridged, configure the common fields on the top of the
page and click the Add button to add the entry.