ADC 700F, 600F User Manual

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Megabit Modem

Megabit Modem 400F, 500L, 600F, and

700F User Manual

Version 3.2.X

Catalog Number MMD4090I1 Issue 1

opyrig

Trademark Information

ADC is a registered trademark of ADC Telecommunications, Inc. Avidia and Megabit Modem are registered trademarks of PairGain Technologies, Inc. No right, license, or interest to

such tradema rks is g rante d here under , an d you ag ree t hat no such r ight, licen se, or inte rest s hall b e asser ted by you wi th respect to such trademark.

Other product names ment ion ed in this practice are used for identification purposes only and may be tr ademarks or registered trad em arks of their respect ive companies.

Disclaimer of Liability

Information contained in this document is company private to ADC DSL Systems, Inc., and shall not be modified, used, copied, reproduced or disc lose d in whole or in part without the wr it te n consent of ADC.

Contents herein are current as of the dat e of publication. ADC res erves the right to change the contents wi thout prior notice. In no event shall ADC be liab le for any damages resulting from loss of data, loss of use, or loss of profits, a nd ADC further disclaims any and all liability for indirect, incidental, special, consequential or other similar damages. This disclaimer of liability applie s to a ll products, publications and services during and after the warranty period.

ii Megabit Modem 400F, 500L, 600F, and 700F User Manual

About This User Manual

ABOUT THIS USER MANUAL

Use this manual to install and configure the Megabit Modem® 400F, 500L, 600F, and 700F. This manual provides instruction on:

• information you will need to configure the modem

• unpacking and inspecting the modem for installation

• installing the modem

• setting up parameters for your applications that will be used to configure the modem

• configuring system parameters

• configuring sessions between the modem and a service provider

• monitoring and troubleshooting the modem

Chapter 10 provides a reference for the technology implemented in the Megabit Modem 400F,

500L, 600F, and 700F. This chapter covers information about ATM over ADSL transmission, operating modes of PPP or bridging/routing, and SNMP management.

IP addresses used in this manual are for example only. You will acquire your own addresses from the service provider and your information services coordinator to configure the Megabit Modem 400F, 500L, 600F, and 700F. However, you will use the IP address specified in

“Accessing the Modem Web Pages” on page 27 to access the Megabit Modem 400F, 500L,

600F, and 700F from a Web browser.

DOCUMENT CONVENTIONS

Two types of messages, identified by icons, appear in the text.

Notes contain information about special circumstances.

Cautions indicate the possibility of equipment damage or the possibility of personal injury.

Megabit Modem 400F, 500L, 600F , and 700F User Manual iii

Product Cer tifications

PRODUCT CERTIFICATIONS

FCC Class B Compliance

This equipment has been tested and f ound to comply with the limits for a Class B d igital device, pursuant to part 15 of the FCC Rules. These limits are designed to provide reasonable protection against harmful interference in a residential installation. This equipment generates, uses and can radiate radio frequency energy and, if not ins talled and used in accordance with the instructions, may cause harmful interference to radio communications. However, there is no guarantee that interference will not occur in a particular installation.

If this equipment does cause harmf ul interference to rad io or television reception, which can be determined by turning the equipment off and on, the user is encouraged to try to correct the interference by one or more of the following measures:

• Reorient or relocate the receiving antenna.

• Increase the separation between the equipment and receiver.

• Connect the equipment into an outlet on a circuit different from that to which the receiver

is connected.

• Consult the dealer or an experienced radio/TV technician for help.

This product meets all safety requirements per UL-1950 standard.

This product meets all EMC and safety requirements per EN 300 386-2 and IEC 950 (EN60950).

iv Megabit Modem 400F, 500L, 600F, and 700F User Manual

Table of Contents

TABLE OF CONTENTS

Chapter 1: About The Product...............................................................................................1

Megabit Modem 400F.........................................................................................................2

Megabit Modem 500L.........................................................................................................4

Megabit Modem 600F.........................................................................................................5

Megabit Modem 700F.........................................................................................................6

Chapter 2: What You Need To Start.....................................................................................9

Verify Package Contents.....................................................................................................9

Requirements For Your System ........................................................................................10

Requirements For The Installation Site.............................................................................10

Location for Modem Installation ........................................................................10

Phone Service......................................................................................................13

What You Need from Your Service Provider...................................................................13

What You Will Choose .....................................................................................................14

Configuration ......................................................................................................14

Power Cable................................................................... .....................................14

Chapter 3: Installing the Modem.........................................................................................15

Attaching the Feet..............................................................................................................16

Setting the MDI/MDI-X Switch........................................................................................17

Installing Cabling ..............................................................................................................18

Setting Up ADSL Service .................................................................................................20

Checking LED Indications................................................................................................20

Connecting Phone Service.................................................................................................21

Chapter 4: Setting Up For Configuration...........................................................................23

Setting Up the PC To Configure the Modem....................................................................24

Configuring a Web Browser..............................................................................................25

Accessing the Modem Web Pages.....................................................................................27

Saving the Configuration...................................................................................................28

Megabit Modem 400F, 500L, 600F , and 700F User Manual v

Table of Cont en t s

Saving the Configuration to NVRAM.................................................................29

Resetting the Modem...........................................................................................30

Resetting the Modem to Factory Defaults...........................................................31

Chapter 5: Configuring System Settings .............................................................................35

Defining TFTP Parameters................................................................................................36

Defining SNMP Parameters...............................................................................................38

Defining Static NAT Entries..............................................................................................40

Configuring Static MAC Entries.......................................................................................42

Display Static MAC Entries................................................................................42

Add a Static MAC Entry.....................................................................................42

Modify a Static MAC Entry................................................................................42

Delete a Static MAC Entry..................................................................................43

Configuring Static Routes..................................................................................................44

Display Static Routes ..........................................................................................44

Add a Static Route...............................................................................................44

Modify a Static Route..........................................................................................44

Delete a Static Route...........................................................................................45

Configuring System Security.............................................................................................46

Admin IP Address...............................................................................................46

RS-232 MGMT Port............................................................................................47

Selecting the System Mode of Operation..........................................................................48

Chapter 6: Configuring PPP Sessions..................................................................................51

Selecting Configuration Parameters..................................................................................52

Setting Up the PPP Mode (700F Only) .............................................................................52

Configuring the WAN PPP Sessions.................................................................................53

Add a PPP over ATM WAN Session..................................................................54

Modify a PPP over ATM WAN Session.............................................................57

Delete a PPP over ATM WAN Session ..............................................................57

Configuring the LAN.........................................................................................................58

vi Megabit Modem 400F, 500L, 600F , and 700F User Manual

Table of Contents

Configure Modem Parameters ............................................................................58

Saving the Configuration....................................................................................59

Assigning LAN Users to PPP Sessions............................................................................. 60

Add a User Assignment ......................................................................................60

Delete a User Assignment:..................................................................................61

Activating and Deactivating Sessions...............................................................................62

Chapter 7: Configuring Bridging/Routing Sessions...........................................................63

Setting Up the Bridging/Routing Mode (700F Only)........................................................64

Configuring the WAN Bridging/Routing Sessions...........................................................65

Add a Bridging/Routing WAN Session..............................................................66

Modify a Bridging/Routing WAN Session.........................................................68

Delete a Bridging/Routing WAN Session...........................................................68

Configuring the LAN ........................................................................................................69

Configure Modem Parameters ............................................................................69

Saving the Configuration....................................................................................70

Activating and Deactivating Sessions...............................................................................71

Chapter 8: Viewing Statistics ...............................................................................................73

Viewing ADSL Status ...................................... ..... ............................................................73

Viewing Network Statistics.......................................................... .....................................75

LAN Statistics.....................................................................................................75

WAN Statistics....................................................................................................76

Chapter 9: Maintenance and Troubles hooting...................................................................77

Maintenance ......................................................................................................................77

Updating Software ..............................................................................................77

Using the RS-232 Management Port................................................................... 80

Setting Up the PC to Request an IP Address.....................................................................83

Troubleshooting.................................................................................................................84

Chapter 10: Technical Reference.........................................................................................85

Transmission on the Wide Area Network.........................................................................85

Megabit Modem 400F, 500L, 600F , and 700F User Manual vii

Table of Cont en t s

ADSL...................................................................................................................85

ATM....................................................................................................................86

System Mode Encapsulation..............................................................................................87

PPP ......................................................................................................................87

Bridging...............................................................................................................88

Routing................................................................................................................90

Encapsulation for RFC 1483 Bridging/Routing..................................................90

Management Protocols ................................................. ..... ................................................91

SNMP..................................................................................................................91

MIB and Trap Support ........................................................................................92

DNS Resolution.................................................................................................................93

TFTP Server.......................................................................................................................93

Appendix A: Specifications and Data ...................................................................................95

WAN Interface Specifications...........................................................................................95

Encapsulation.....................................................................................................................96

LAN Interface....................................................................................................................97

Physical Specifications......................................................................................................97

Power Supply.................................... ....................................... ..........................................97

Environmental....................................................................................................................97

Compliance........................................................................................................................98

RFCs ..................................................................................................................................98

MIBs ..................................................................................................................................98

Rate vs. Reach....................................................................................................................99

Hardware..........................................................................................................................100

Installation Kit.......................................... ...... ..... ..............................................100

Connector Pinouts .............................................................................................101

Appendix B: Technical Assistance and Returns................................................................103

Technical Support............................................................................................................103

World Wide Web.................................................... .........................................................103

viii Megabit Modem 400F, 500L, 600F , and 700F User Manual

Table of Contents

Advance Replacement.....................................................................................................103

Billing..............................................................................................................................104

Returns.............................................................................................................................105

Appendix C: Configuration Worksheets............................................................................107

Appendix D: Glossary ..........................................................................................................117

Megabit Modem 400F, 500L, 600F , and 700F User Manual ix

Table of Cont en t s

x Megabit Modem 400F, 500L, 600F, and 700F User Manual

ABOUT THE PRODUCT

You have purchased the Mega bit Modem® that connects your Ethernet LAN to service providers for instant and high-speed access to the Internet or to other types of Wide Area Network (WAN) applications. It uses Asymmetric Digital Subscriber Line (ADSL) technology to give you broadband access over existing cabling in your home, office, or building.

The Megabit Modem is easy to install and configure. To install the modem:

• connect a telephone cable from the modem to a wall phone jack for ADSL service

• connect a cable from the modem to a PC or an Ethernet hub for LAN service

• connect a power cable to a local power source

To access the modem configuration, you launch your Web browser and enter the modem IP address as the URL. Use the modem Web pages to:

• configure ADSL, LAN, and WAN parameters

• view ADSL, IP, LAN, and WAN statistics

• upgrade software

• define SNMP parameters

• perform a syste m reset

• define static MAC, NAPT, and route tables

In addition, the LEDs on the modem front panel provide continual s tatus at-a-glance for network and modem connections.

The following sections list the Megabit Modem 400F, 500L, 600F, and 700F features and applications.

Megabit Modem 400F, 500L, 600F , and 700F User Manual 1

Megabit Modem 400F

MEGABIT MODEM 400F

The Megabit Modem 400F is designed for LAN applications and offers these features:

• supports full-rate ADSL and G.lite

• offers rates up to 7.552 Mbps downstream and 928 kbps upstream for full rate

• offers rates up to 1.5 Mbps downstream and 512 kbps upstream for G.lite

• offers symmetric rates up to 928 kbps

• supports 1483 bridging and routing over ATM

• supports up to 32 Bridge/Router sessions

• contains an embedded SNMP agent

• operates as a DHCP server

• supports NAT (including NAPT) and DNS

See the illustration on the next page for an application example.

2 Megabit Modem 400F, 500L, 600F, and 70 0F User Manual

Chapter 1: About The Product

Bus

ness Internet Access

ADSL

400F

Megabit Modem 400F, 500L, 600F , and 700F User Manual 3

Internet

Megabit Modem 500L

MEGABIT MODEM 500L

The Megabit Modem 500L is a rate adaptive G.lite modem for single user applications and offers these features:

• complies with the G.lite standard

• offers rates up to 1.5 Mbps downstream and 512 kbps upstream

• supports RFC 2364 PPP over ATM ( AAL 5)

• supports up to 8 sessions

• contains an embedded SNMP agent

• operates as a DHCP server

• supports NAT (including NAPT) and DNS

Microfilter

ADSL

500L

4 Megabit Modem 400F, 500L, 600F, and 70 0F User Manual

Internet

Chapter 1: About The Product

MEGABIT MODEM 600F

The Megabit Modem 600F is a high-performance ADSL modem designed for power users. It offers these features:

• supports full-rate ADSL and G.lite

• offers rates up to 7.552 Mbps downstream/928 kbps upstream for full rate

• offers rates up to 1.5 Mbps downstream/512 kbps upstream for G.lite

• offers symmetric rates up to 928 kbps

• supports RFC 2364, carrying PPP traffic over ATM (AAL5)

• supports 32 PPP sessions

• contains an embedded SNMP agent

• operates as a DHCP server

• supports NAT (including NAPT) and DNS

600F

POTS

Splitter

Provider Network

Megabit Modem 400F, 500L, 600F , and 700F User Manual 5

Megabit Modem 700F

MEGABIT MODEM 700F

The Megabit Modem 700F is designed as an ADSL router for LAN applications.

• supports full-rate ADSL and G.lite.

• offers rates up to 7.552 Mbps downstream/928 kbps upstream for full rate

• offers rates up to 1.5 Mbps downstream/512 kbps upstream for G.lite

• offers symmetric rates up to 928 kbps

• supports RFC 2364 PPP traffic over ATM (AAL5)

• supports 1483 bridging and routing over ATM

• supports up to 32 sessions in PPP O ver ATM mode or

supports up to 32 sessions in Bridge/Router mode

• contains an embedded SNMP agent

• operates as a DHCP server

• supports NAT (including NAPT) and DNS

See the illustration on the next page for an application example.

6 Megabit Modem 400F, 500L, 600F, and 70 0F User Manual

Chapter 1: About The Product

Large Bus

ness Internet Access

ADSL

700F

Megabit Modem 400F, 500L, 600F , and 700F User Manual 7

Internet

Megabit Modem 700F

8 Megabit Modem 400F, 500L, 600F, and 70 0F User Manual

WHAT YOU NEED TO START

This chapter identifies the preparations and prerequisites for installing the Megabit Modem 400F, 500L, 600F, and 700F. Before installing the modem, verify that:

• The contents of the package are accurate as described on this page.

• Your system meets the requirements for connecting to and configuring the modem

(see “Requirements For Your System” on page 10).

• Your facility meets the installation site requirements (see “Requirements For The

Installation Site” on page 10).

• The configuration parameters are available from your service provider (see “What You

Need from Your Service Provider” on page 13).

VERIFY PACKAGE CONTENTS

As you unpack your Megabit Modem, visually inspect the contents for signs of damage. If the equipment was damaged in transit, report the damage to the transportation company and to the sales representative.

Check the contents of the package for the following:

• one black cable

• one grey phone cord

• four rubber, self-adhesive feet

• two screws

• power supply and optiona l power cord

(see “Power Cable” on page 14 for options)

• grey cable and DB-9 console port adapter If you need to store the modem for a prolonged period, store it in the original antistatic bag

and packaging. Observe environmental specifications as stated on page 97.

Megabit Modem 400F, 500L, 600F , and 700F User Manual 9

Requirements For Your System

REQUIREMENTS FOR YOUR SYSTEM

You need the following hardware and software to complete the installation and configuration of the Megabit Modem 400F, 500L, 600F, and 700F:

• PC with an Ethernet Network Interface Card (NIC)

• TCP/IP network protocol stack (see the operating system documentation)

• Web browser installed such as Netscape

• Ethernet hub (optional )

or Internet Explorer® Version 4.0 or higher

REQUIREMENTS FOR THE INSTALLATION SITE

Before installing the Megabit Modem 400F, 500L, 600F, and 700F, you must:

• select a location to install the modems as described in the sectio n below

• identify requirements to connect phones as described in the section “Phone Service” on

page 13

Location for Modem Installation

You can install the modem either:

• placed on a flat surface (shown on page 11)

• mounted on a wall (shown on page 12)

Your facility must have the following minimum site requirements to install each modem:

• power outle t

• RJ-11 wall jack that has DMT ADSL service available

10 Megabit Modem 400F, 500L, 600F, and 700F User Manual

Flat-Surface Mount

Do not stack the mode ms when installing on a flat surface. The modems do not dissipate heat properly when stacked.

Place the modems on a flat surface, such as on a table or in a rack.

PWR LINK TX RX

LAN

MEGABIT

MODEM

SYNC

ADSL

RX MAR

00F

PWR LINK TX RX

LAN

MEGABIT

MODEM

SYNC

TX RX MAR

ADSL

00F

Minimum

1-inch clearance

Minimum

1-inch clearance

PWR LINK TX RX

LAN

MEGABIT

MODEM

SYNC

TX RX MAR

ADSL

00F

Chapter 2: What You Need To Start

Megabit Modem 400F, 500L, 600F , and 700F User Manual 11

Requirements For The In stallation Site

Wall Mount

Observe the minimum dimensions between multiple modems (shown in the illustration) to ensure sufficient ventilation for heat dissipation

Mount the Megabit Modem on a wall using the two screws included with the modem.

12 Megabit Modem 400F, 500L, 600F, and 700F User Manual

Chapter 2: What You Need To Start

Phone Service

If you get phone service with your data service, you need the following:

• S1 Network Interface Device (or other POTS splitter) installed by your service provider

• RJ-11 phone jacks for phone service

The POTS splitter is a device that separates data transmission from ph one ser vice. After installing the POTS splitter, connect separate jacks for data and for phone service. Ensure that your service provider indicates which jacks are for data and which jacks are for phone service.

WHAT YOU NEED FROM YOUR SERVICE PROVIDER

This section lists the information you need to configure system settings an d sessions for the modem. Contact your service provider for this information. Use the worksheets, provided in

Appendix C on page 107, to record your configuration information. When you b e gin to

configure the modem in Chapter 4 on page 23, the procedures refer you to the proper table for the configuration information that you recorded.

1 System mode (WAN connection for the sessions between the modem and the service

provider): PPP over ATM or Bridge/Router RFC 1483

2 If Bridge/Router:

• Configure as a Bridge only, as a Router only, or as a Bridge and Router.

• If Bridge or Router, choose LLC or VC-MUX encapsulation.

• If Router, choose the version of and direction for RIP (RIP1, RIP2, or RIP1

compatible).

• If Bridge, select whether or not to enable Spanning Tree.

3 If PPP over ATM and using CHAP, identify CHAP authentication name. 4 Session addre ss for Ports 1 through 32 (WAN c onfiguration):

• ATM VPI and ATM VCI (specified for each session)

• when using fixed IP addresses, IP address specified for each session by the

service provider

• for PPP system mode, Login Name and Login Password (specified for each session)

For more information about the configuration ch oices listed above, s ee Chapter 10, “Technical

Reference” on page 85.

Megabit Modem 400F, 500L, 600F , and 700F User Manual 13

What You Will Choose

WHAT YOU WILL CHOOSE

Before configuring the modem, consider the options in the following “Configuration” section. Ensure that you have the appropriate power cable for your facility as described below in the

“Power Cable” section.

Configuration

You can choose to use:

• Network Address Translat ion (NAT) prot ocol. This protocol incl udes both basi c NAT and

Network Address Port Translaton (NAPT). Basic NAT uses a one-to-one mapping of a private IP address and a public IP address. NAPT uses a multiple-to-one mapping of multiple IP addresses and their ports to a single IP address and its ports. For more information about the NAT protocol, see “NAT” on page 87.

• Domain Name System (DNS) resolution. You must specify the IP address for a device to

serve as the DNS resolver. You can also specify a second IP address to designate another device to serve as a secondary DNS resolver. The DNS device maps human-readable addresses to IP addresses. For simplicity and ease of management, use DNS relay. DNS relay allows the LAN hosts to configure the Megabit Modem as the DNS server. Depending on the host sending the DNS message and what session it is assigned to, the Megabit Modem will relay the message to the appropriate DNS server. For more information about DNS resolution, see “DNS Resolution” on page 93.

• TFTP server for downloading sof tware updates to the modem. Yo u specify th e IP address,

subnet mask, and directory path (where software updates are located) for the device that will be the TFTP server.

Power Cable

The Megabit Modem 400F, 500L, 600 F, and 700F are available with a variet y of power supplies and power cords. When you order your mod em, choose one of the following as the last num ber in the product part number (example: use 150-2122-7x for the 700F) for your order to ind icate which power option you need:

• 2 indicates a power supply for International use and does not include a power cord.

• 3 indicates a power supply for North American use and includes a North American

power cord.

• 4 indicates a Universal power supply and includes a European power cord.

• 5 indicates a Universal power supply and includes a UK/Ireland power cord.

14 Megabit Modem 400F, 500L, 600F, and 700F User Manual

INSTALLING THE MODEM

The Megabit Modem is easy to install by:

• attaching the four adhesive-backed feet

• setting the MDI/MDI-X switch

• connecting a cable from the modem to a PC or an Ethernet hub for LAN service

• connecting a phone cord from the modem to a wall phone jack for DMT ADSL Internet

or other types of WAN services

• connecting a power cable to a local power outlet

Perform the installation on the following pages (see “Requirements For The Installation Site”

on page 10 to determine where to place modems). Use the parts listed below in the installation

procedures.

Part Function

Installation Kit

Rubber feet (four) Attaches to the base of the modem. Black cable Connects the modem 10/100BASE-T connector to the LAN through a hub

or to a PC NIC. This cable is a straight-through Category 5 cable.

Grey cord Connects the modem ADSL connector to the RJ-11 wall jack with DMT

ADSL service for access to the Internet or other types of WAN applcations.

Power cable Connects the modem POWER connector to the local power source. Power

supply optionally has a power cord. (See “Power Cable” on page 14 for selection options.)

Not In Installation Kit (in ship box)

Grey cable and adapter

Megabit Modem 400F, 500L, 600F , and 700F User Manual 15

Connects the RS-232 MGMT port to an ASCII terminal or a PC running terminal emulation software. Adapter assembly connects to a DB-9 connector on the PC. Then, one RJ-45 connector installs in the adapter and the other connector into the console port on the modem.

Attaching the Feet

ATTACHING THE FEET

Attach each of the four adhesive-backed rubber feet to a footprint recess on the bottom of the modem.

16 Megabit Modem 400F, 500L, 600F, and 700F User Manual

Chapter 3: Installing the Modem

SETTING THE MDI/MDI-X SWITCH

Using the MDI/MDI-X switch, the Megabit Modem can communicate with a device on the LAN that is either MDI or MDI-X without having to change the cable (a straight-through cable is supplied with the installation kit).

Set the switch for the 10/100BASE-T port to either:

• MDI-X when you are connecting to a device with a MDI port such as a PC with an

Ethernet NIC

• MDI when you are connecting to a device with a MDI-X port such as a hub, repeater,

bridge, or router

For connection to devices such as a PC

MDI-X

For connection to

MDI

devices such as a hub

10/100BASE-T

Megabit Modem 400F, 500L, 600F , and 700F User Manual 17

RS232 MGMTMDI MDI-X

ADSL POWER

Installing Cabling

INSTALLING CABLING

Install the black cable for the 10/100BASE-T LAN connection, the grey phone cord for the ADSL port WAN connection, and the power cable to the power connector (cable specified on

page 14).

Megabit Modem

To power

outlet

PC, hub or other network device

Wall jack with DMT ADSL service

Switch

MDI MDI-X

10/100BASE-T port

10BASE-T

RS232

GMT

RS-232 MGMT port

(600F and 700F only)

ADSL port

Power connector

18 Megabit Modem 400F, 500L, 600F, and 700F User Manual

Chapter 3: Installing the Modem

1 After you have set the MDI/MDI-X switch to the correct position, connect the black cable

from the modem 10/100BASE-T port to your PC or hub.

2 Connect the grey phone cord from the modem ADSL port to the ADSL wall jack. If your

installation requires a splitter or microfilter, refer to the manufacturer’s documentation for further instructions.

3 Connect the power cable from the modem power connector to a power outlet. If you need pinouts fo r the ADS L and 10 /100BAS E-T connec tors , see “Connector Pinouts” on

page 101. For information on how to use the RS-232 m a nagement port for maintenance, see “Using the RS-232 Management Port” on page 80.

Megabit Modem 400F, 500L, 600F , and 700F User Manual 19

Setting Up AD SL Service

SETTING UP ADSL SERVICE

The service provider sets up the ADSL parameters for your service. The modem must have the ADSL SYNC LED lit before you can connect sessions with your service provider. Verify SYNC in the following section, “Checking LED Indications.”

CHECKING LED INDICATIONS

The table below describes LED indications for all operational modes. LEDs on the modem front panel prov ide continual status at- a-glance for network and modem connections.

LED State Description

PWR On green Modem has power.

Off Modem does not have power.

LAN

LINK On green A PC, hub, or other network device is connected to the modem

Off No device is connected to the modem 10/100BASE-T interface.

TX Flashing green Modem is transmitting data to devices on the LAN.

Off Modem is not transmitting data to the LAN.

RX Flashing green Modem is receiving data from devices on the LAN.

Off Modem is not receiving data from the LAN.

SYNC On green ADSL transceiver is synchronized and in normal operation mode.

Flashing green ADSL transceiver is in a start-up sequence.

Off ADSL modem transceiver is not detecting a transceiver at the far end.

TX Flashing green Modem is transmitting data to the service provider.

Off Modem is not transmitting data to the service provider.

RX Flashing green Modem is receiving data from the service provider.

Off Modem is not receiving data from the service provider.

MAR On green ADSL margin is at or above the value set by the service provider.

Off ADSL margin is below the value set by the service provider.

OH On yellow Telephone receiver is off hook. Off Telephone receiver is on hook.

10/100BASE-T interface.

ADSL

20 Megabit Modem 400F, 500L, 600F, and 700F User Manual

Chapter 3: Installing the Modem

CONNECTING PHONE SERVICE

The Megabit Modem 400F, 500L, 600F, and 700F modem provide full support for the ITU standard G.hs, G.dmt, and G.lite. In the traditional ADSL deployment, POTS splitters are required to separate data transmission from phone service. In this case, the service provider will supply you with a splitter. You will have one or more jacks for phone service and one jack for ADSL data service. Connect your phones to the jacks indicated by the service provider for phone service. However, using G.lite allows for splitterless deployment. In this case, you will not need to install a splitter.

Megabit Modem 400F, 500L, 600F , and 700F User Manual 21

Connecting Phone Serv ic e

22 Megabit Modem 400F, 500L, 600F, and 700F User Manual

SETTING UP FOR CONFIGURATION

Set up a PC and a Web browser to co nfigure th e Megabit Modem 40 0F, 500L, 6 00F, and 700F . This chapter provides the set up procedures, then shows you how to access and navigate the Megabit Modem Web pages. The configuration process flow is shown below.

Start

Setting Up the PC To Configure

the Modem

Chapter 4 on page 24

500L, 600F, and 700F

Configuring PPP over ATM Sessions

• Configuring the WAN PPP

Sessions

• Configuring the LANClick Apply.

• Activating and Deactivating

Sessions

Configuring a Web Browser

Accessing the Modem Web Pages

Configuring System Settings

• Defining TFTP Parameters

• Defining SNMP Parameters

• Configuring System Security

• Selecting the System Mode of

Operation

Configuring Bridging/Routing Sessions

Chapter 4 on page 25

Chapter 4 on page 26

Chapter 5 on page 35

400F and 700F

• Configuring the WAN

Bridging/Routing Sessions

• Configuring the LAN

• Activating and Deactivating

Sessions

Megabit Modem 400F, 500L, 600F , and 700F User Manual 23

Setting Up the PC To Configure the Modem

SETTING UP THE PC TO CONFIGURE THE MODEM

Set up your PC to be on the same IP subnet as the modem. Since the m odem default uses DHCP, it will automatically configure your IP settings once you set up that option. If you want to view or change the default IP address for the modem, see “Using the RS-232 Management Port” on

page 80.

The following is an example of how to set up a PC running Microsoft Windows 98.

1 Open the 2 From the Configuration tab, double-click 3 If DHCP has been enabled on the modem (default), select

address automatically

4 Enter

Control Panel then double-click the Network icon.

TCP/IP.

Obtain an IP

and skip to step 5. Otherwise, select Specify an IP address.

IP Address and Subnet Mask. The default LAN IP address i s 192.168.0.1. Use an IP

address from the following rang e: 192 .16 8.0. 2 t o 19 2.1 68. 0.25 4. The default subnet mask is 255.255.255.0.

5 Click 6 Click 7 Click

OK to close the TCP/IP Properties window. OK to close the Network window. OK to restart the computer.

24 Megabit Modem 400F, 500L, 600F, and 700F User Manual

Chapter 4: Setting Up For Configuration

CONFIGURING A WEB BROWSER

Access the Megabit Modem Web page through a Web browser (see page 10 for Web browser versions supported). The Web browser must have the proxies disabled and cache settings enabled to compare the cached document against the network document every time it is accessed.

The following is an example of how to make the configuration changes using Netscape Navigator 4.0.

1 Open your Web browser. 2 Click 3 From Category, select 4 From Category, select 5 Click

Edit, Preferences to open the Preferences dialog.

OK to close the Preferences window.

Advanced, click Cache, then select Every time. Advanced, click Proxies, then select Direct connection to the Internet.

Megabit Modem 400F, 500L, 600F , and 700F User Manual 25

Configur i ng a Web Browser

The following is an example of how to make the configuration changes using Internet Explorer 5.5:

1 Open your Web browser. 2 Click 3 In the 4 Select

Tools, Internet Options to open the Internet Options dialog.

Temporary Internet Files section of the dialog, click Settings.

Every visit to the page, then click OK.

5 Click the 6 In the 7 Click 8 Click

Proxy Server section of the dialog, clear the Use a proxy server box. OK to close the LAN Settings dialog. OK to close the Internet Options dialog.

Connections tab, then click LAN Settings to open the LAN Settings dialog.

26 Megabit Modem 400F, 500L, 600F, and 700F User Manual

Chapter 4: Setting Up For Configuration

ACCESSING THE MODEM WEB PAGES

Type http://192.168.0.1 in the Location Bar field of the Web browse r (as shown below), then press

. (192.168.0.1 is the default IP address for the Ethernet port and is a private address

ENTER

specified for use by RFC 1918. If you change the Ether net IP address th rough the manag ement port, you will enter the new IP address in the

http://192.168.0.1/index.htm

By default, the Megabit Modem (except the 400F) initializes in “PPP over ATM” mode and displays the page to the top right:

Location Bar.)

Location Bar

If the Megabit Modem is in “Bridging/Routing” mode, it displays this page:

Megabit Modem 400F, 500L, 600F , and 700F User Manual 27

Saving the Configuration

SAVING THE CONFIGURATION

Save the majority of the configuration changes by the clicking Apply. However, there are other configuration changes that require you to reset the modem in order to update NVRAM with these modifications. These changes are described in the following table:

Item Menu Tab

System Mode system general LAN IP Address and Net Mask lan general DHCP IP Address Range lan general RIP Version lan general

See the following sections to:

• save configuration changes to NVRAM on page 29

• reset the modem to activate the configuration on page 30

• reset the modem to restore the factory default values on page 31

28 Megabit Modem 400F, 500L, 600F, and 700F User Manual

Chapter 4: Setting Up For Configuration

Saving the Configuration to NVRAM

After clicking Apply at the bottom of a configuration page, the chang es are automatically saved to NVRAM. Changes may either take effect immediately or after system reset.

To the right is an example of a configuration change (TFTP server IP address) that only requires you to

Apply for changes to take effect

click immediately (commit changes to RAM) and be saved to NVRAM.

Below is an example of a configuration change (LAN IP address) that requires both the click of

Apply at the configuration screen and a

system reset for changes to take effect and to be saved to NVRAM.

1 Locate Apply at the bottom of the

dialog.

2 Click

Apply to open the

confirmation dialog.

3 Click OK to reset the modem.

Megabit Modem 400F, 500L, 600F , and 700F User Manual 29

Saving the Configuration

Resetting the Modem

Resetting the modem causes all active connections to drop.

After you make changes to the modem configuration and write the changes to NVRAM or return modem configuration to factory defaults, you must reset the modem. See page 28 for a list of changes that you must reset to effect.

1 From the 2 Click

system menu, click general to open the General System window.

Reset Unit.

3 Click Proceed to reset the modem.

30 Megabit Modem 400F, 500L, 600F, and 700F User Manual

Chapter 4: Setting Up For Configuration

Resetting the Modem to Factory Defaults

You can return the Megabit Modem parameters to the factory default values. This provides a known starting point if you are troubleshooting the system or simply need to reconfigure parameters. The factory default values are listed on page 32 and page 33.

1 From the 2 Click

system menu, click general to open the General System window.

Set Factory Default.

When you click Proceed to return to factory default values, the modem automatically resets.

3 Click Proceed to return to factory default values.

Megabit Modem 400F, 500L, 600F , and 700F User Manual 31

Saving the Configuration

Listed in the table below are the default values for the Megabit Modem in PPP over ATM mode. Reference this table to learn the values assigned to the modem after resetting it to factory default.

Parameter Default Value Parameter Default Value

System Setup

System Mode PPP over ATM SNMP parameters TFTP parameters Enable trap sending Not enabled

TFTP Server IP Address 192.168.0.2 Trap Server IP Address 0.0.0.0 TFTP Server Net Mask 255.255.255.0 Trap Server Net Mask 255.255.255.0 TFTP Server Path blank field Trap Community String public File Name tiger.bin Get Community String public

Admin IP Address 0.0.0.0 Set Community String private

PPP Over ATM

PPP Over ATM WAN Configuration PPP Over ATM LAN Configuration

Service Name blank field IP Address 192.168.0.1 ATM VPI 0 IP Net Mask 255.255.255.0 ATM VCI 100 DHCP Enabled Login Name blank field Start DHCP IP Address 192.168.0.2 Login Password blank field End DHCP IP Address 192.168.1.1 Chap Host blank field Primary DNS 192.168.0.1 Address Translation Enabled Gateway 192.168.0.1 Address Assignment Dynamic Static NAT Entries (private, proxy, and remote) IP Address 0.0.0.0 IP Addresses 0.0.0.0

User Assignments (for PPP WAN) Ports 0

Service Name blank field Protocol UDP User’s IP Address 0.0.0.0

32 Megabit Modem 400F, 500L, 600F, and 700F User Manual

Chapter 4: Setting Up For Configuration

Listed in the table below are the default values for the Megabit Modem in Bridge/Router mode. Reference this table to learn the values assigned to the modem after resetting it to fact ory default.

Parameter Default Value Parameter Default Value

Bridge/Router RFC 1483

Brouter WAN Configuration Not selected Spanning Tree Selected

Service Name blank field Brouter LAN Configuration ATM VPI 0 Bridging Enabled ATM VCI 100 Port Priority 100 Bridging Enabled Routing Disabled Port Priority 101 RIP Direction Both Routing Disabled RIP Version Rip1 RIP Direction Both IP Address 192.168.0.1 RIP Version Rip1 IP Net Mask 255.255.255.0 IP Address 0.0.0.0 Default gateway IP Address 192.168.0.1 IP Net Mask 0.0.0.0 Default gateway IP Net Mask 255.255.255.0 Encapsulation LLC DHCP Not enabled

Static Mac Address Entry all zeros Start IP Address 192.168.0.2

MAC Address 0:0:0:0:0:0 End IP Address 192.168.1.1 Source Port 0 Primary DNS 192.168.0.1 Dest Port 0 Gateway 192.168.0.1

Static Route Entry (IP Address, IP Network Mask, Gateway IP Address)

0.0.0.0

Megabit Modem 400F, 500L, 600F , and 700F User Manual 33

Saving the Configuration

34 Megabit Modem 400F, 500L, 600F, and 700F User Manual

CONFIGURING SYSTEM SETTINGS

Before configuring sessions with a service provider, set up system parameters for the Megabit Modem. The following sections show the Web pages you use to configure system parameters. Set the:

• TFTP server IP address and network mask for performing functions such as

software upgrades on page 36

• SNMP parameters on page 38

• Static NAT Entries on 40

• Static MAC Entries on42

• Static Routes on 44

• system security on page 40

• system mode on page 48 for sessions between the modem and the service provider; select

either PPP over ATM or 1483 Bridging/Routing (for Megabit Modem 700F only)

Unless specified otherwise, configuration parameters shown in this section are for example only.

Megabit Modem 40 0F , 50 0L, 600F , and 700F User Manual 35

Defining TFTP Parameters

DEFINING TFTP PARAMETERS

A TFTP server is a device on the LAN from which you can download software updates to your modem. See page 93 for more information on a TFTP server. See page 77 for procedures on how to upda te the software on your modem.

Information Description

IP Address The four octet address of the TFTP server (example: 192.168.0.2) Net Mask The subnet mask of the TFTP server (example: 255.255.255.0) File Path The path on the TFTP server where the updated software is located.

This may or may not be required depending on the TFTP server configuration. (Example: c:\download\)

File Name The full name of the updated software (example: tiger.bin)

36 Megabit Modem 400F, 500L, 600F , and 700F User Manual

1 From the system menu,

general to open the

click General System window.

2 Enter the TFTP Server IP

address

for the device that

will be the TFTP server.

3 Enter the TFTP Server Net

Mask

(subnet mask) for

the TFTP server.

4 Enter the TFTP Server File

Path

where the updated software resides on the TFTP server (leave blank if the file is stored in the root shared folder on the TFTP server).

Chapter 5: Configuring System Settin gs

5 Enter the 6 Click

TFTP Server File Name of the updated software file.

Apply to activate the changes.

Example

The illustration above shows the configuration to access a TFTP server with IP address

192.168.0.2 using a subnet mask of 255. 255.255.0. The TFTP server has been set u p so that “tiger.bin” has been placed directly inside the shared directory (not in a subdirectory of the shared directory). Therefore, the File Path should be left blank.

Megabit Modem 40 0F , 50 0L, 600F , and 700F User Manual 37

Defining SNMP Parameters

DEFINING SNMP PARAMETERS

The modem has an SNMP agent that allows it to be managed remotely by a Network Management System (NMS). See page 91 for more information about managing the modem through SNMP. Use the following table for a description of the SNMP parameters:

Information Description

Enable Trap Sending Enables/Disables SNMP messages to the trap server. Trap Server IP Address The IP address of the server receiving the traps. Trap Server Net Mask The subnet mask of the server receiving the traps. Trap Community String The authentication string of the server receiving the traps. The default

string is public.

Read-Only Community String

Read-Write Community String

The authentication string for only viewing the modem statistics/parameters. The SNMP management station must have the same string in its configuration. The default is public.

The authentication string for viewing the modem statistics and changing parameters. The SNMP management station must have the same string in its configuration. The default is private.

1 From the

general to open the General

system menu, click

System window.

2 Select Enable Trap Sending if

you want the modem to send traps to a server.

3 Enter the

Address

Trap Server IP

for the server that the

traps will be sent to.

4 Enter the Trap Server Net Mask

(subnet mask) for the server that the traps will be sent to from the modem.

You can change the community string s to names you choose . The fields have default names as shown in the screen on page 39 and are case sensitive. If you change the name, however, the com muni ty str in g nam es m ust m atch on both the manager and agent to allow access to the SNMP function.

38 Megabit Modem 400F, 500L, 600F , and 700F User Manual

5 Enter the Trap Community String. 6 Enter the Read-Only Community String.

Chapter 5: Configuring System Settin gs

7 Enter the 8 Click

Read-Write Community String.

Apply to activate the changes.

Example

The illustration on the previous page shows the configuration for the modem to be managed remotely by a trap server located at 192.168 .0.3 using a net mask of 255.255.255 .0. In or der for the modem to communicate with the trap server, both the modem and trap server must use the same community strings: trap community string set to

readit, and read-write community string set to writeit.

trapit, read-only community string set to

Megabit Modem 40 0F , 50 0L, 600F , and 700F User Manual 39

Defining Static NAT Entries

DEFINING STATIC NAT ENTRIES

Static NAT entries are used in PPP Over ATM mode. They are required only for applications that use TCP/UDP connections initiated from the remote end (WAN). Through the

Table

, you can map inbound traffic f rom a rem ote us er to a u ser or a lo gical po rt on yo ur LAN. You can enter a maximum of 32 static NAT entries. See page 87 for more information on NAT and an example application.

Static NAT

1 From the

system menu, click static NAT table to open the Static NAT Table window.

40 Megabit Modem 400F, 500L, 600F , and 700F User Manual

Chapter 5: Configuring System Settin gs

Information Description

Private IP Address The non-registered IP address of a device on the LAN side of your modem. Private Port The logical port number where TCP or UDP traffic will be sent to from the WAN

Proxy IP Address The registered (public) IP address mapped to the Private IP Address. Permitted

Proxy Port The logical port number that TCP or UDP traffic will first be sent to from the WAN. Remote IP Address The IP address of the device across the WAN that will be sending the TCP or UDP

Remote Port The logical port number of the remote device that will be sending the UDP or TCP

Protocol The protocol, UDP or TCP, to be used as the transport between the LAN and the

after it is translated from the Proxy Address/Port combination.

traffic sent to this address from the WAN will end up at the device with the associated Private IP Address. This is the IP address assigned to the WAN port by the service provider.

traffic to your local device with the Private IP Address. Set this to 0.0.0.0 to allow access by any host.

traffic. For example, specify 23 for telnet traffic and specify 21 for FTP traffic. This is usually set to 0 to allow any port.

remote user for this static NAT entry.

2 Enter the Private IP Address of the device on the LAN side of the modem. 3 Enter the 4 Enter the 5 Enter the 6 Enter the

Private Port number of the device on the LAN side of the modem. Proxy IP Address that is mapped to the Private IP Address. Proxy Port number that is mapped to the Private Port.

Remote IP Address o f the device across the WAN that will initiate a session. If you

do not have the information for the remote user, enter 0.0.0.0.

7 Enter the Remote Port number of the device across the WAN that will initiate a session. For

example, specify 23 for telnet traffic and specify 21 for FTP traffic. If you do not have the information for the remote user, enter 0.

8 Select the 9 Click

Megabit Modem 40 0F , 50 0L, 600F , and 700F User Manual 41

Protocol from the drop-down menu.

OK to accept the changes or Cancel to return to the previous screen without changes.

Configuring Static MAC Entries

CONFIGURING STATIC MAC ENTRIES

When the modem's mode of operation is Bridge/Router RFC 1483 and the modem is configured as a bridge, the modem forwards Ethernet frames based on MAC addresses. Up to 32 static MAC entries can be added to the modem bridge MAC addres table.

Information Description

MAC Address The hardware address of a device. Source Port The port receiving the frame. Destination Port The port that the traffic will be forwarded out of.

Display Static MAC Entries

1 From the system menu, click static MAC table to open the Static MAC Table window. 2 Observe the list of MAC addresses.

Add a Static MAC Entry

1 From the system menu, click static MAC table to open the Static MAC Table window. 2 Click 3 Configure the MAC Address parameters as defined above. 4 Click

Add to display the Static MAC Address Entry window.

Apply to add the new data to the list.

Modify a Static MAC Entry

1 From the system menu, click static MAC table to open the Static MAC Table window. 2 Click

42 Megabit Modem 400F, 500L, 600F , and 700F User Manual

Select of the address to be changed.

3 Configure the MAC Address parameters as defined above.

Chapter 5: Configuring System Settin gs

4 Click

OK to change the existing data to the list.

Delete a Static MAC Entry

1 From the system menu, click static MAC table to open the Static MAC Table window. 2 Click 3 Click

Select of the address to be deleted. Delete to remove the selected address.

Megabit Modem 40 0F , 50 0L, 600F , and 700F User Manual 43

Configuring Stati c R outes

CONFIGURING STATIC ROUTES

Information Description

Destination The destination IP address of the packet. Net Mask The destination subnet mask of the packet. Gateway The next hop IP address the packet will be forwarded to.

Display Static Routes

1 From the system menu, click static route table to open the Static Route Table window. 2 Observe the list of static routes.

Add a Static Route

1 From the system menu, click static route table to open the Static Route Table window. 2 Click 3 Configure the static route parameters as defined above. 4 Click

Add to display the Static Route Entry window.

Apply to add the new data to the list.

Modify a Static Route

1 From the system menu, click static route table to open the Static Route Table window. 2 Click 3 Configure the static route parameters as defined above. 4 Click

44 Megabit Modem 400F, 500L, 600F , and 700F User Manual

Select of the route to be changed.

OK to change the existing data to the list.

Chapter 5: Configuring System Settin gs

Delete a Static Route

1 From the system menu, click static route table to open the Static Route Table window. 2 Click 3 Click

Select of the static route to be deleted. Delete to remove the selected route.

Megabit Modem 40 0F , 50 0L, 600F , and 700F User Manual 45

Configuring System Se curity

CONFIGURING SYSTEM SECURITY

System security includes the use of the Admin IP Address and configuring console access through the RS-232 MGMT port.

Admin IP Address

This address determines which devices on the LAN can manage the Meg abit Modem. You can select:

• limited access where only one device on the LAN can manage the modem

• general access where any device on the LAN can manage the modem

Perform the following to configure administration for your modem:

1 From the 2 Select one of the following and enter the appropriate IP address:

a When you allow only one device on the LAN to manage the modem, enter the

b When you allow any device on the LAN to manage the modem, enter

3 Click

Example: The illustration above shows the modem configuration to allow only the station with the IP address 192.168.0.3 to access the modem on the same LAN.

system menu, click general to open the General System window.

IP address for that one device in the IP address field.

0.0.0.0 in the

IP address field.

Apply to activate the changes.

46 Megabit Modem 400F, 500L, 600F , and 700F User Manual

Chapter 5: Configuring System Settin gs

You can change the Admin IP Address for the 600F and 700F by physically connecting to the RS-232 MGMT port.

RS-232 MGMT Po rt

The RS-232 MGMT Port allows access to several parameters such as the LAN IP settings, Admin IP Address, and modem reset.

These parameters can be vital to the operation of the modem. You should password protect the RS-232 MGMT port:

1 Access the console prompt by ““Using the RS-232

Management Port” on page 80”

2 At the main menu, enter 3 At the

Enter Choice prompt, enter the password for

RS-232 port access. If one has not been previously configured, press

Enter without entering a password.

4 When a “Please enter the new password:” message

appears, type in the new password.

5 When a “Please retype the new password:” message

appears, retype the new password.

6 When the “Password accepted” message appears,

you have changed the password successfully.

Megabit Modem 40 0F , 50 0L, 600F , and 700F User Manual 47

Selecting the System Mod e of Op eration

SELECTING THE SYSTEM MODE OF OPERATION

System mode indicates the mode of operation between the modem and the service provider for WAN sessions. The only model capable of selecting between system modes is the Megabit Modem 700F. It can operate in either Br idge/Router RFC 1483 or PPP over ATM mod e. It can not operate in both modes simultaneously. The Megabit Modem 400F operates only in Bridge/Router RFC 14 83 mode, while the Megabi t Modem 500L and 600F operate only in P PP over ATM mode. This section provides procedures to select the system mode. Then, use the section “Saving th e Configuration” on page 28 to effect the system mode of operation.

All sessions that occur simultaneously must be the same system mode: either

Bridge/Router RFC 1483. Your service provider will indicate which system mode you can use.

or See the “System Mode Worksheet” on page 108 for the system mode that you recorded.

Point-to-Point Protocol (PPP) over ATM is connection-oriented where the session has to be established between the modem and the service provider before data transmission begins. Bridge/Router RFC 14 83 does not establ ish a session. This mode switches pack ets based on the data link-layer address for bridgi ng or on the network-layer address for routing.

PPP over ATM

48 Megabit Modem 400F, 500L, 600F , and 700F User Manual

Use the following procedure to set the system mode:

Chapter 5: Configuring System Settin gs

1 From the

click

system menu,

general to open the

General System window.

2 Select the PPP Over ATM or

Bridge/Router RFC1483

from the drop-down menu as indicated by your service provider.

3 Click

Apply.

4 At the Proceed message,

click OK.

5 Click

reset unit to reset the

modem and activate the changes.

6 At the System Reset

message, click

Proceed.

Megabit Modem 40 0F , 50 0L, 600F , and 700F User Manual 49

Selecting the System Mod e of Op eration

50 Megabit Modem 400F, 500L, 600F , and 700F User Manual

CONFIGURING PPP SESSIONS

You can set up PPP sessions between one of these Megabit Modem products and a service provider:

• 500L

• 600F

• 700F (in PPP over ATM mode)

Use these sections, in the order shown, to set up the sessions:

For information about: Go to page:

Selecting Configuration Parameters Setting Up the PPP Mode (700F Only) 52

Configuring the WAN PPP Sessions 53 Configuring the LAN 58 Assigning LAN Users to PPP Sessions 60 Activating and Deactivating Sessions 62

For these sessions, PPP runs over ATM virtual circuits (VCs).

Megabit Modem 40 0F , 50 0L, 600F , and 700F User Manual 51

Selecting Configuration Parameters

SELECTING CONFIGURATION PARAMETERS

There are many configuration options for the mod em from which you can select. The follow ing options are recommended for enhanced performance.

• DHCP to allow the modem to dynamically serve IP addresses to devices on the LAN

• NAT to map public IP addresses (proxy IP addresses) acquired from the service provider

for the WAN sessions to private IP addresses on the LAN

The following table shows possible configurations, with the recommended configur ation first:

DHCP NAT How IP Address Acquired

On On Dynamic Off On Dynamic On On Fixed Off On Fixed Off Off Fixed

SETTING UP THE PPP MODE (700F ONLY)

For the Megabit Modem 700F only, you can select either PPP over ATM or RFC 1483 bridge/router encapsulation for all sessions you set up. To have all sessions (up to 32) as PPP over ATM mode of opera tion, do the following:

From the system menu, select

general.

2 Select

3 Click

52 Megabit Modem 400F, 500L, 600F , and 700F User Manual

PPP Over ATM as the Mode

of Operation

modem.

Apply, then reset the

Chapter 6: Configuring PPP Sessions

CONFIGURING THE WAN PPP SESSIONS

From the WAN Connections page, you configure parameters that set up communication between the modem and the service provider through PPP over ATM sessions. You can set up the number of sessions indicated for each modem. The number of ses sions you can set up is also the number of s imultaneous sessions the modem can sup port:

• 8 sessions for a 500L

• 32 sessions for a 600F

• 32 sessions for a 700F

Access the

WAN Connections page and use the following table for reference.

wan

connections

Megabit Modem 40 0F , 50 0L, 600F , and 700F User Manual 53

Configuring the WAN PPP Sessions

Information Description

Port Designates each WAN port for configuring and monitoring sessions. Connection Displays the name of the session. Status Displays the connection state.

Up - Session is up. Down - Session is down. Connecting - Session is setting up. LogInErr - Login Name/Password not recognized in WAN Configuration. Disabled - Session Enable checkbox is not enabled in WAN Configuration. Enabled - Session Enable checkbox is enabled in WAN Configuration. DslDown - ADSL loop is down.

Add a PPP over ATM WAN Sessio n

You add a PPP WAN session in the PPP Over ATM WAN Configuration window. Use the following reference table and procedure to set up a session.

54 Megabit Modem 400F, 500L, 600F , and 700F User Manual

Information Description

Chapter 6: Configuring PPP Sessions

Connection Name A unique descriptive identifier of the session that also displays in the connection

field.

ATM VPI Virtual Path Identifier (VPI) identifies the virtual path that transports ATM cells in a

virtual Channel. The range of values is 0 to 15.

ATM VCI Virtual Channel Idenifier (VCI) identifies a virtual channel for each session (each

session is a virtual channel). Can be a number from 32 up to a maximum of 253 (on

VPI 0, VCIs 254 and 255 are reserved), with the first 32 (0 through 31) reserved. Login Name Each session requires a Logon Name that is supplied by the service provider. Login Password Each session requires a Logon Password that is supplied by the service provider. Primary DNS IP address of Domain Name Service device that translates names into numeric IP

addresses. This is the device at the service provider that the modem will translate

requests. Secondary DNS IP address of a secondary Domain Name System device that translates names into

numeric IP addresses. Address Translation Enables/disables the use of Network Address Translation (NAT) protocol to translate

private IP addresses to public IP addresses assigned to each session. InBound NAT Default IP address of the designated NAT default user for inbound traffic. When the NAT

engine does not have enough information to do the inbound translation, it forwards

the inbound packet to the NAT default user. Continuous Retry Enables/disables the Continuous Retry function of the PPP session establishment

process. When Continuous Retry is enabled, the PPP engine continuously retries

establishing the PPP session until one of the following is true:

• The PPP session is established successfully. The session status then goes to the

UP state.

• Authentication fails during the handshaking. The session status then goes to the

LogInErr state.

• The PPP session is disconnected. The session status then goes to the DOWN

state.

Always ON When enabled, the PPP engine establishes/maintains the session even when there

are no users assigned to it. When disabled, the PPP engine will not establish or will

terminate the session when there are no users assigned to it. Session Enable If enabled, the session is active and is ready to establish the PPP link. If disabled, the

session is not active. Address Assignment Determines whether the session IP address is assigned by the service provider

(Dynamic) or entered by the user (Fixed).

Megabit Modem 40 0F , 50 0L, 600F , and 700F User Manual 55

Configuring the WAN PPP Sessions

1 To add a session, click Add to display the PPP Over ATM WAN Configuration page. 2 Configure the PPP over ATM parameters shown and defined in the figure and table

page 54.

3 Click 4 Click

OK to create the session or click cancel to cancel the set up of the session. Refresh to update the connections window.

56 Megabit Modem 400F, 500L, 600F , and 700F User Manual

Chapter 6: Configuring PPP Sessions

Modify a PPP over ATM WAN Session

1 Click Edit next to any Port 1-32 to display the PPP Over ATM WAN Configuration page for that

port.

2 Change parameters as needed using the table on page 55 for a description of parameters.

Delete a PPP over ATM WAN Session

1 From the wan menu, click connections to open the WAN Connections window. 2 Select a port and click 3 Click 4 Click

Delete to remove the selected session from the list. OK to return to connections window or click Cancel to cancel any changes you made

to the current configuration.

5 Click Refresh to update the WAN Connections window.

Megabit Modem 40 0F , 50 0L, 600F , and 700F User Manual 57

Edit to open the PPP Over ATM WAN Configuration page.

Configuring the LAN

CONFIGURING THE LAN

Devices on your local LAN attach to the modem through its LAN port. Configure parameters for communicating between the local LAN and the modem.

Configure Modem Parameters

Access the General System page to set up modem system

lan

parameters. 1 From the lan menu, click general to open the LAN General

general

window.

Information Description

IP Internet Protocol. Operates at layer 3 and provides addressing.

IP Address The IP address of the modem Ethernet 10/100BASE-T LAN port. IP Net Mask The IP Net Mask address of the modem Ethernet 10/100BASE-T LAN port.

DHCP Dynamic Host Configuration Protocol.Used to assign dynamic IP addresses.

Enable Enables/Disables the modem's DHCP server. Lease IP Address Range Range of IP addresses to lease out.The starting address is one address higher

Primary DNS IP address of the primary Domain Name System (DNS) device that translates

Default Gateway Default router set to the IP address of the LAN port.

than the LAN IP address. The pool size is 256.

names into IP addresses.

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Chapter 6: Configuring PPP Sessions

2 Enter the IP address and the Net Mask. 3 Click on the box adjacent to the letters DHCP. A check mark in the box indicates the

modem's DHCP server is enabled. No check mark in th e box indicates the modem's DHCP server is not enabled.

4 Click

Apply.

Saving the Configuration

Although you have submitted your new system settings, the parameter s are not perm anent until you write them to NVRAM. See “Saving the Configuration” on page 28 wh en you want to save to NVRAM.

Megabit Modem 40 0F , 50 0L, 600F , and 700F User Manual 59

Assigning LAN Users to PPP Sessions

ASSIGNING LAN USERS TO PPP SESSIONS

Map the IP addresses for the LAN-side users to each PPP over ATM session.

In PPP over ATM mode, you can map up to a maximum of 8 users to the sessions you configure for the 500L. In addit i on, yo u can map 64 us ers to the sessions you configu re for the 600F and 700 F. For example, you could map two users to 32 configured sessions, 64 users to one configured session, or any combination you choose, up to a maximum of 64 users mapped to all the sessions you configure. You can map multiple users to one session; you cannot, however, map multiple sessions to any user.

Enter the IP address or addresses for each user on the LAN that will be assigned to this session. To access, select

User Assignment on the PPP over ATM WAN Configuration page.

Information Description

Connection Name The name of the PPP session. User’s IP Address The IP address of the LAN-side user’s machine. Inbound NAT Default The default device for inbound traffic. This parameter should be configured when

setting up the WAN PPP session. See “Configuring the WAN PPP Sessions” on

page 53 for more information.

Add a User Assignment

1 From the wan menu, click user assignment to open the WAN User Assignment window. 2 Click 3 Configure the user assignment parameters defined in the table above. 4 Click

60 Megabit Modem 400F, 500L, 600F , and 700F User Manual

Add to display the user assignment Entry window.

Apply to add the new data to the list. To cancel the process, click Cancel.

Chapter 6: Configuring PPP Sessions

Delete a User Assignm ent:

1 From the wan menu, click user assignment to open the WAN User Assignment window. 2 Select the user assignment to be deleted, then click the 3 Click

Delete to remove the selected user assignment.

Select button of that a s signment.

Megabit Modem 40 0F , 50 0L, 600F , and 700F User Manual 61

Activating and Deactivat i ng Sessions

ACTIVATING AND DEACTIVATING SESSIONS

Activate sessions as you want to use them. Also, you may want to de-activate some sessions, while leaving other sessions active. Follow one of the two methods to activate and deactivate sessions.

From the WAN Connections window: 1 From the

connections to open the

wan menu, click

WAN Connections window.

2 Select the sessions you

want active then click

Connect. The modem sets

up the session with the service provider.

3 When dynamically

acquiring an IP address from the service provider, the session receives the IP address at this time.

From the Brouter WAN Port Configuration windo w: 1 From the

wan menu, click connections to

open the WAN Connections window.

2 Click Edit on the box adjacent to the session

to activate or deactivate.

3 To activate the session, place a checkmark

Session Enable box by clicking in it.

in the To deactivate the session, clear the checkmark.

4 Click

62 Megabit Modem 400F, 500L, 600F , and 700F User Manual

OK to accept the changes.

CONFIGURING

BRIDGING/ROUTING SESSIONS

You can set up RFC 1483 Bridging/Routin g s e ssions between one of these Megabit Modem products and a service provider:

• 400F

• 700F (in RFC 1483 Bridging/Routing mode)

Use these sections, in the order shown, to set up the sessions:

For information about: Go to page:

Setting Up the Bridging/Routing Mode (700F Only) Configuring the WAN Bridging/Routing Sessions 65

Configuring the LAN 69 Activating and Deactivating Sessions 71

For these sessions, PPP runs over ATM virtual circuits (VCs).

Megabit Modem 40 0F , 50 0L, 600F , and 700F User Manual 63

Setting Up the Bridging/Rou ti ng Mode (700F Only)

SETTING UP THE BRIDGING/ROUTING MODE (700F ONLY)

For the Megabit Modem 700F only, you can select either PPP over ATM or RFC 1483 bridge/router encapsulation for all sessions you set up. To have all sessions, up to 32 , as Bridging/Routing mode of operation, do the following:

From the system menu, select

general.

2 Select

Mode of Operation.

the

3 Click

modem.

Bridge/Router RFC1483 as

Apply, then reset the

64 Megabit Modem 400F, 500L, 600F , and 700F User Manual

Chapter 7: Configuring Bridging/Routing Se ssio ns

CONFIGURING THE WAN BRIDGING/ROUTING

ESSIONS

From the WAN Connections page, you configure parameters that set up communication between the modem and the service provider through Bridging/Routing sessions. You can set up the number of sessions indicated for each modem. The number of ses sions you can set up is also the number of s imultaneous sessions the modem can sup port:

• 32 sessions for a 400F

• 32 sessions for a 700F

wan

connections

Information Description

Port Designates each WAN port for configuring and monitoring sessions. Connection Displays the name of the session. Status Displays the connection state.

Up - Session is up. Down - Session is down. Connecting - Session is setting up.

Megabit Modem 40 0F , 50 0L, 600F , and 700F User Manual 65

Configuring the WAN Bridging/Routing Sessions

Add a Bridging/Routing WAN Session

You add a bridging/routing WAN session in the WAN Port Configuration window. Use the following reference table and procedure to set up a session.

Information Description

Service Name A unique descriptive identifier of the session that also displays in the connection

ATM VPI Virtual Path Identifier (VPI) identifies the virtual path that transports ATM cells in a

ATM VCI Virtual Channel Idenifier (VCI) identifies a virtual channel for each session (each

Bridging The function of filtering/forwarding frames based on layer 2 headers.

Enable Enables/Disables bridging. Port Priority The priority of the WAN port.

Routing The function of routing packets based on layer 3 headers.

Enable Enables/Disables routing. IP Address The IP address of the modem's WAN port. IP Net Mask The IP Net Mask address of the modem's WAN port. RIP Direction The direction the RIP routing information flows. RIP Version The version of the RIP protocol.

66 Megabit Modem 400F, 500L, 600F , and 700F User Manual

field.

virtual Channel. The range of values is 0 to 15.

session is a virtual channel). Can be a number from 32 up to a maximum of 253 (on VPI 0, VDIs 254 and 255 are reserved), with the first 32 (0 through 31) reserved.

Chapter 7: Configuring Bridging/Routing Se ssio ns

1 To add a session, click Add to display the WAN Port Configuration page. 2 Configure the bridging/routing parameters shown and defined in the figure and table

page 65.

3 Click 4 Click

OK to create the session or click cancel to cancel the set up of the session. Refresh to update the connections window.

Megabit Modem 40 0F , 50 0L, 600F , and 700F User Manual 67

Configuring the WAN Bridging/Routing Sessions

Modify a Bridging/Routing WAN Session

1 Click Edit next to any Port 1-32 to display the Bridging/Router WAN Configuration page for that

port.

2 Change parameters as needed using the table on page 66 for a description of parameters.

Delete a Bridging/Routing WAN Session

1 From the wan menu, click connections to open the WAN Connections window. 2 Select a port and click 3 Click 4 Click

Delete to remove the selected session from the list. OK to return to connections window or click Cancel to cancel any changes you made

to the current configuration.

5 Click Refresh to update the WAN Connections window.

68 Megabit Modem 400F, 500L, 600F , and 700F User Manual

edit to open the WAN Port Configuration page.

Chapter 7: Configuring Bridging/Routing Se ssio ns

CONFIGURING THE LAN

Devices on your local LAN attach to the modem through its LAN port. Configure parameters for communicating between the local LAN and the modem.

Configure Modem Parameters

Access the General System page to set up modem system

lan

parameters. 1 From the lan menu, click general to open the LAN General

general

window.

Information Description

IP Internet Protocol. Operates at layer 3 and provides addressing.

IP Address The IP address of the modem Ethernet 10/100BASE-T LAN port. IP Net Mask The IP Net Mask address of the modem Ethernet 10/100BASE-T LAN port.

Bridging The function of filtering/forwarding frames based on layer 2 headers.

Enable Enables/Disables bridging. Port Priority The priority of the port on a LAN segment.

Routing The function of routing packets based on layer 3 headers.

Enable Enables/Disables routing. RIP Direction The direction the RIP routing information flows. RIP Version The version of the RIP protocol.

Megabit Modem 40 0F , 50 0L, 600F , and 700F User Manual 69

Configuring the LAN

Information Description

DHCP Dynamic Host Configuration Protocol. Used to assign dynamic IP addresses.

Enable Enables/Disables the modem's DHCP server. Lease IP Address Range Range of IP addresses to lease out. The starting address is one address higher

Primary DNS IP address of the primary Domain Name Service (DNS) device that translates

Secondary DNS IP address of the secondary Domain Name Service (DNS) device that translates

Default Gateway Default router set to the IP address of the LAN port.

than the LAN IP address. The pool size is 256.

names into IP addresses.

2 Enter the IP address and the Net Mask. 3 Click on the box adjacent to the letters DHCP. A check mark in the box indicates the

modem's DHCP server is enabled. No check mark in th e box indicates the mo dem's DHCP server is not enabled.

4 Click

Apply.

Saving the Configuration

Although you have submitted your new system settings, the parameters are not permanent until you write them to NVRAM. See “Saving the Configuration” on page 28 when you want to save to NVRAM.

70 Megabit Modem 400F, 500L, 600F , and 700F User Manual

Chapter 7: Configuring Bridging/Routing Se ssio ns

ACTIVATING AND DEACTIVATING SESSIONS

Activate sessions as you want to use them. Also, you may want to de-activate some sessions, while leaving other sessions active. Follow one of the two methods below to activate and deactivate sessions.

From the WAN Connections window: 1 From the

connections to open the

wan menu, click

WAN Connections window.

2 Select the sessions you

want active then click

Connect. The modem sets

up the session with the service provider.

3 When dynamically

acquiring an IP address from the service provider, the session receives the IP address at this time.

From the Brouter WAN Port Configuration windo w: 1 From the

wan menu, click connections to

open the WAN Connections window.

2 Click Edit on the box adjacent to the session

to activate or deactivate.

3 To activate the session, place a checkmark

Session Enable box by clicking in it.

in the To deactivate the session, clear the checkmark.

4 Click

Megabit Modem 40 0F , 50 0L, 600F , and 700F User Manual 71

OK to accept the changes.

Activating and Deactivat i ng Sessions

72 Megabit Modem 400F, 500L, 600F , and 700F User Manual

VIEWING STATISTICS

You can view status for the ADSL link (“Viewing ADSL Status”) and for WAN and LAN statistics (“Viewing Network Statistics” on page 75).

VIEWING ADSL STATUS

The Megabit Modem 400F, 500L, 600F, and 700F displays the status of the ADSL link.

Resetting ADSL will close off the ADSL loop connection between the modem and the service provider. Active connections will disconnect.

Megabit Modem 400F, 500L, 600F , and 700F User Manual 73

Viewing ADSL Status

Reference the following table for a description of the System Status parameters.

Information Description

ADSL Link Status Shows the status of the ADSL connection between the modem and the service

Alarms Identifies conditions on the ADSL link that are reported as an alarm such as: Loss of

Current SNR Margin Shows the Signal-to-Noise Ratio (SNR) margin (signal clarity), in decibels, at which

Min SNR Margin Indicates the minimum SNR margin allowed before the ADSL MAR LED on the

Errored Seconds Shows the total number of seconds that ADSL link errors occurred during a 24-hour

Unavailable Seconds Shows the total number of seconds the ADSL link was not available for transmission

Line Attenuation Shows the loss of signal power in the transmission in decibels. Data Rate Shows the rate of data transmission in kilobits per second (kbps).

1 From the

provider.

Sync (LOS), Loss of Frame (LOF), Loss of Margin (LOM), or Loss of Cell Delineation (LCD).

the modem is currently operating.

modem front panel lights.

period or since the ADSL link was reset.

since either the modem was powered on or the ADSL statistics were last cleared.

adsl menu, click status to open the ADSL Status windo w.

2 Monitor the ADSL Status. 3 Click

Refresh to update the statistics or Clear to clear the statistics.

74 Megabit Modem 400F, 500L, 600F, and 700F User Manual

Chapter 8: Viewing Statistics

VIEWING NETWORK STATISTICS

The Megabit Modem 400F, 500L, 600F, and 700F displ ay statu s for the LAN and WAN link s. From the

LAN Statistics

The Megabit Modem 400F, 500L, 600F, and 700F displays status for the LAN.

Main Menu, select Statistics to display the Statistics Menu.

View the following LAN information:

Information Description

Rx Packets The total number of packets received at the LAN interface. Tx Packets The total number of packets transmitted out the LAN interface. Dropped Packets The total number of packets discarded by the modem. Collisions The total number of packets that have collided on the LAN segment.

1 From the

statistics menu, click LAN to open the LAN Statistics window.

2 Monitor the LAN statistics. 3 Click

Megabit Modem 400F, 500L, 600F , and 700F User Manual 75

Refresh to update the statistics or Clear to clear the statistics.

Viewing Network Statistic s

WAN Statistics

The Megabit Modem 400F, 500L, 600F, and 700F displays status for the WAN.

View the following WAN information:

Information Description

Rx Packets The total number of packets received at the WAN interface. Tx Packets The total number of packets transmitted out the WAN interface. Bad Packets The total number of errored packets detected at the WAN interface.

1 From the

statistics menu, click WAN to open the WAN Statistics window.

2 Monitor the WAN statistics. 3 Click

76 Megabit Modem 400F, 500L, 600F, and 700F User Manual

Refresh to update the statistics or Clear to clear the statistics.

MAINTENANCE AND

TROUBLESHOOTING

MAINTENANCE

You can update software by specifying a device on your LAN where you will place new software for the update (see “Defining TFTP Parameters ” on page 36). Then, use the procedure

“Updating Software ” on page 77 to download new software from the TFTP device to the

Megabit Modem 400F, 500L, 600F, and 700F. Through the RS-232 MGMT port on the Megabit Modem 600F and 700F, you can change the

modem LAN port IP address and network mask, the default gateway IP address, and the IP address for the device on the LAN that can administer the modem (see page 80).

Updating Software

Updating software images in binary format req uire th e use of a TFTP s erver. The TFTP server stores the files which will be downloaded to your modem. This guide assumes that you have correctly set up your TFTP server on the same subnet as the modem and that the appropriate files are available to download.

When updating software remotely, file corruption is a major concern. For example, if an image file altered during the TFTP process the modem may not restore its connections after a system reset. To eliminate such possibilities, the modem software performs a CRC check for the integrity of each file after it has been downloaded.

Megabit Modem 400F, 500L, 600F , and 700F User Manual 77

Maintenance

Access the General System page to configure the TFTP parameters.

Reference the following table for a description of the TFTP parameters.

Information Description

IP Address The four octet address of the TFTP server (example: 192.168.0.3). Net Mask The subnet mask of the TFTP server (example: 255.255.255.0). File Path The path on the TFTP server where the updated software is located. This may or may

File Name The full name of the updated software (example: tiger.bin).

1 From the 2 Enter the 3 Enter the 4 Enter the 5 Enter the

78 Megabit Modem 400F, 500L, 600F, and 700F User Manual

not be required depending on the TFTP server configuration. (Example: c:\download\)

system menu, click general to open the General System window. TFTP Server IP address. TFTP Server Net Mask (subnet mask) for the TFTP server. File Path where the updated software resides on the TFTP server (if necessary).

File Name of the updated software file.

6 Click Apply to activate the changes.

Before initiating a software upgrade, ensure that all files are in the directory you specified on the TFTP server when you configured system parameters.

Chapter 9: Maintenance and Troubleshooting

7 Click 8 Click

upgrade software to begin the file transfer. Proceed to confirm the file transfer process.

9 Wait for the file to download. 10 Click

Yes to restart the modem.

Megabit Modem 400F, 500L, 600F , and 700F User Manual 79

Maintenance

Using the RS-232 Management Port

Use the RS-232 management port only when you must manually change the IP address and subnet mask. Also, use the port if you do not remember the administrative IP address you entered on your modem.

The Megabit Modem 400F and 500L do not have an RS-232 port.

1 Connect the modem to a PC as shown below.

PC, hub or other network device

Wall jack with DMT ADSL service

Switch

MDI MDI-X

10/100BASE-T port

10BASE-T

RS232

GMT

RS-232 MGMT port

(600F and 700F only)

ADSL port

Power connector

80 Megabit Modem 400F, 500L, 600F, and 700F User Manual

Chapter 9: Maintenance and Troubleshooting

2 Configure these communication settings (if using terminal emulation, select AN SI ):

• 9600 baud

• no parity

• 8 data bits

• stop bit

• flow control off

3 Display the following screen:

Pairgain Megabit Modem 700F Setup Menu =========================================== BSP version: 3.0.0(1) SW version: 3.2.0 IP address: 192.168.0.1 IP network mask: 255.255.255.0 Default gateway IP address: 0.0.0.0 Admin IP address: 0.0.0.0 =========================================== (1)Enter IP address (2)Enter IP network mask (3)Enter default gateway IP address (4)Enter IP Admin address (5)Reset modem (6)Change password (7)Logout >

Megabit Modem 400F, 500L, 600F , and 700F User Manual 81

Maintenance

4 Enter any of these parameters at the prompt:

• Type then enter the LAN IP address for the modem (LAN port which is the

10/100BASE port).

• Type then enter the LAN IP network mask for the modem.

• Type then enter the Default gateway IP address.

• Type then enter the IP address for a device on the LAN that will manage the modem.

5 Type to reset the modem after you change the LAN IP address and the LAN IP

network mask.

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Chapter 9: Maintenance and Troubleshooting

SETTING UP THE PC TO REQUEST AN IP ADDRESS

The modem, as a Dynamic Host Configuration Protocol (DHCP) server, pr ovides an IP address dynamically to devices on the LAN. When you choose to use DHCP for the modem to serve IP addresses to the devices on your LAN, ensure that the TCP/IP properties are set to automatically obtain the IP address from the modem.

The following is an example of how to set up the PC using Microsoft use an operating system other than Windows 98, refer to the appro priate operating syst em user documentation.

Windows® 98. If you

1 Open the 2 Double-click the

Control Panel window by clicking Start, Settings, Control Panel.

Network icon.

3 From the Configuration tab, double-click 4 Select 5 Click 6 Click 7 Click

Obtain an IP address automatically. OK to close the TCP/IP Properties window. OK to close the Network window. OK to restart the computer.

TCP/IP.

Megabit Modem 400F, 500L, 600F , and 700F User Manual 83

Troubleshooting

TROUBLESHOOTING

If this occurs: Try this:

PC or hub not communicating with the modem

SYNC ADSL LED Contact the service provider when the LED remains off indicating that the modem is not

MARGIN ADSL LED lights green

LAN TX and RX LEDs are not on

ADSL TX and RX LEDs are not on

• Check the LINK LED. If it is off, check the cabling to the 10/100BASE port and to the hub

or the NIC card in the PC to ensure it is secure.

• Check the position of the MDI/MDI-X switch. Set the switch to MDI when connecting to

a PC. Set the switch to MDI-X when connecting to a hub or router.

• Check that you are using a Web browser (Netscape or Internet Explorer) Version 4.0

or newer.

• Check that you have a TCP/IP protocol stack installed on your PC.

• If this is the initial installation, check that you set the IP address on your PC to obtain an

IP address automatically. Make sure you have configured the LAN IP address of the modem to an address that is on the correct subnet. See “Setting Up the PC To Configure

the Modem” on page 18.

• You configured the LAN IP address of the modem to an address that is not on the

same subnet.

• Check the NIC card installation for correct IRQ, drivers, and adapter setup. See

appropriate documentation for the NIC card.

If none of the above corrects your problem, contact your service provider.

detecting a transceiver at the far end. Flashing green indicates that the modem is attempting to bring up the link. Solid green indicates that the loop is up.

The modem synchronizes at a minimum transmission rate of 64 kbps. The modem rate adapts in increments of 32 kbps.

Contact the service provider when the LED is off indicating that the margin is below that specified by the service provider.

Check that the LINK LED is on. If it is on, you are simply not transmitting or receiving data on the LAN 10/100BASE-T port. If the LINK LED is not on, check the section “PC or hub not

communicating with the modem” in this table.

Check that the SYNC LED is on. If it is on, you are simply not transmitting or receiving data on the WAN ADSL port. If, the SYNC LED is not on, contact your service provider.

84 Megabit Modem 400F, 500L, 600F, and 700F User Manual

TECHNICAL REFERENCE

This chapter provides technical information about how your modem transmits data between users on your LAN and a service provider over the WAN.

TRANSMISSION ON THE WIDE AREA NETWORK

ATM over DMT ADSL is the technology that provides the high-speed transmission between the modem and the service provider. This transmission o ccurs over a single-pair telephone line. The following sections describe these technologies.

ADSL

Asymmetric Digital Subscriber Line (ADSL) is the technology used to transmit dat a between the modem and service provider at the physical layer. It provides data at asymmetric rates so that downstream traffic from a service provider to you is faster than upstream traffic from you to the service provider. The downstream transmission rate is up to 7.552 Mbps, while the upstream rate is up to 928 Kbps. Included in the ADSL bandwidth is analog POTS.

Discrete Multitone (DMT) is the line coding used for ADSL. Basically, it divides the bandwidth into subchannels. Some of the subchannels are reserved for analog POTS. The other subchannels are allocated to upstream and downstream traffic. Within the upstream and downstream subchannels, some subchannels are used for management and performance functions.

DMT ADSL provides rate-adaptive transmission that allows the service provider to deliver you the best transmission rate determined by distance and line conditions.

Megabit Modem 400F, 500L, 600F , and 700F User Manual 85

Transmission on the Wide Area Network

ATM

Asynchronous Transfer Mode (ATM) is a technology that can simultaneously transmit voice, data, and video over ADSL. ATM uses fixed-size cells that transmit over a preestablished connection called a Permanent Virtual Circuit (PVC). Quality of Ser vice pr ovides UBR.

ATM cells are 53 bytes that comprise a 5-byte header and 48-byte payload. The header includes the Virtual Path Identifier (VPI) and Virtual Channel Identifier (VCI) that you entered when you configured each session. The VPI and VCI provide the vir tual conn ection b etween the mod em and the service provider. The VPI identifies the Virtual Path (VP) that transports ATM cells in a Virtual Channel (VC). The Megabit Modem 400F, 500L, 600F, and 700F has 32 VCs in the VP, which provides the 32 sessions.

Mapping an ATM Session

Your service provider will give you a VCI and VPI address for each session. The VCI address for each session (each session is a VC) can be a number from 32 up to a maximum of 255, with the first 32 numbers (0 through 31) reserved. The VCI value for each VC must be unique for each of the 32 sessions. The VPI value must always be 0.

86 Megabit Modem 400F, 500L, 600F, and 700F User Manual

Chapter 10: Technical Reference

SYSTEM MODE ENCAPSULATION

Point-to-Point Prot ocol (PPP) ov er ATM or RFC 1483 Br idging /Rout ing are the t wo prot ocol s you can use to encapsulate data for transport across the ADSL WAN. The following sections describe these protocols.

PPP

PPP runs over ATM virtual circuits. PPP exists between the hardware layer and the network-layer interface protocols. It is a widely used protocol for establishing connections on the WAN. PPP provides the set up and release of connections for each session. PAP/CHAP provide the authentication for the PPP sessions.

In PPP over ATM mode, you can map private IP address LAN users to PPP sessions using RFC 1631 Networ k Address Translation protocol.

PAP/CHAP Authentication Security

Password Authentication Protocol (PAP) and Challenge-Handshake Authentication Protocol (CHAP) are two ways to authenticate PPP sessions. PAP and CHAP are both offered since some systems support only PAP. With PAP, the modem sends authentication reques ts to the service provider and authentication occurs only once during the life of the link.

With CHAP, the service provider returns an authentication challenge to the modem during authentication. CHAP can be renegotiated during the life of the link. Also, bo th the modem and the service provider must support clear text versions of the password. The CHAP host field must be the same on both ends of the session.

NAT

RFC 3022 Network Address Translation (NAT) includes two operations. They are Basi c NAT and Network Address Port Translation (NAPT).

Basic NAT only deals with IP addresses. Therefore, it is a one-to-one private IP address to public IP address (proxy address) mapping. Basic NAT allows you to hide your private addresses behind the public IP addresses assigned to a session. Corporations that need flexibility using different IP address ranges can benefit from this operation, as the private IP addresses will remain the same when the public IP addresses are reassigned.

Megabit Modem 400F, 500L, 600F , and 700F User Manual 87

System Mode Encapsulation

NAPT does not have the limitation of using only the IP address in the translation. It also uses TCP/UDP ports. It is a method that allows multiple IP addresses and their TCP/UDP ports to be translated into one IP address and its ports. A good candidate for NAPT is a small office with multiple hosts but one public IP address. In this case, NAPT allows the entire office to use the public IP address to communicate out of the private network.

An example of NAPT in this small office envionment is the RealPlayer™ application. The RealPlayer (client at the office) initiates a TCP connection to the RealServer™ on the Internet, which then initiates a UDP connection back to RealPlayer. RealPlayer can then tell the server to use a specific UDP port for the UDP connection. The user should set up a static NAT entry for the UDP connection for RealPlayer to work properly through NAPT.

Bridging

You can configure the Megabit Modem 400F and 700F as a bridge to forward Ethernet data based on MA C addresses.

MAC Layer Bridging

A bridge moves information across a network from a source to a destination at the data link layer (of an OSI reference model). The information is sent to a physical address known as a Media Access Control (MAC) address. The Megabit Modem 400F and 700F provide transparent Ethernet MAC-layer bri dging.

The bridge learns up to 1 024 ad dresses. Additio nally, when you configur e the mo dem, y ou can add 32 static addresses through the static MAC address configuration page.

Spanning Tree Protocol

The Megabit Modem 400F and 700F support 80 2.1d Sp annin g Tree protocol which elimi nates loops in a LAN topology by partitioning out redundant links between LAN seg ments. This ensures that there is only one path, or link, between any two nodes on the network. If this link goes down, Spanning Tree re-enables partitioned links to create a new loop-free topology if possible.

An example of the active topology is shown on page 89. In the example, the spanning tree algorithm partitions out the bridge from LAN A to LAN B, and creates the link from ENET2 to Bridge 5.

88 Megabit Modem 400F, 500L, 600F, and 700F User Manual

Chapter 10: Technical Reference

Example LAN Physical Network

This physical configuration is valid only when used with Spanning Tree to eliminate loops.

LAN

Bridge 3Bridge 2Bridge 1

ENET 1

LAN

Bridge 4

E N E T

Bridge 5

ENET 3

Loop-freeT opology

Using SpanningTreeProtoc o l

LAN A

Bridge 3Bridge 2Bridge 1

ENET 1

LA BN

Bridge 4

Megabit Modem 400F, 500L, 600F , and 700F User Manual 89

E N E T

Bridge 5

ENET 3

System Mode Encapsulation

Routing

You can configure the Megabit Modem 400F and 700F router to route Ethernet-encapsulated IP datagrams based on IP addresses. Use Routing Information Protocol (RIP) to automatically identify the route from the session on the Megabit Modem 400F and 700F to the destinatio n. You can specify the direction and version of RIP that allows other routers to update their routing tables automatically (for example, information on how many hops between destinations). The version of RIP you select for the session must match the version supported by the service provider. Versions RIP1 and RIP-1 compatible are used for broadcast. RIP Version 2 is used for multicast.

The router also learns addresses. In addition to the addresses it learns, you can add 32 static route entries on the LAN Brouter con figuration page. Through the s tatic IP routing featu re, you can configure the Megabit Modem 400F and 700F as an IP router with statically programmed route entries. You can enable this function to provide broadcast filtering and to prevent eavesdropping by specifying multiple destination gateways. When static IP routing is enabled, you can access only specific remote IP subnets or hosts.

Since IP routers make forward or filter decisions bas ed on the network-layer IP address instead of the MAC hardware address, MAC-level broadcast frames are prevented from reaching unwanted destinations in the network.

When setting parameters for an external router, configure a Static Route entry in any of the external routers that may have been specified as a Default Router or as a Gateway. This implementation prevents other parties from discovering routes through eavesdropping. The format of this entry varies among the various router vendors, but is typically in the form of "Destination," "Mask," and "Gateway," where the "Destination" is the remote IP Subnet or host address, and "Gateway" is the IP address of the modem on the same subnet as the external router.

Encapsulation for RFC 1483 Bridging/Routing

Most users select LLC, which allows you to run multiple protocols over the VC. An encapsulation header identifies the types of protocol being carried in the transmission (for example, IP). VC-MUX allows only one proto col to run over th e VC. The type of protocol must be negotiated between the modem and the service provider prior to the transmission. Because there is only one protocol allowed, the header is not required.

90 Megabit Modem 400F, 500L, 600F, and 700F User Manual

ADC 700F, 600F User Manual

Specifications and Main Features

Frequently Asked Questions

User Manual