3com 3C840 User manual

®

http://www.3com.com/

OfficeConnect™ Remote

840 SDSL Router User’s

Guide

Release 1.2.0

Part No. 10031396 Rev. AA

May 2000

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3Com Corporation

5400 Bayfront Plaza

Santa Clara, California

95052-8145

in any form or by any means or used to make any derivative work (such as translation, transformation, or

adaptation) without written permission from 3Com Corporation.

3Com Corporation reserves the right to revise this documentation and to make changes in content from time

to time without obligation on the part of 3Com Corporation to provide notification of such revision or change.

3Com Corporation provides this documentation without warranty, term, or condition of any kind, either

implied or expressed, including, but not limited to, the implied warranties, terms or conditions of

merchantability, satisfactory quality, and fitness for a particular purpose. 3Com may make improvements or

changes in the product(s) and/or the program(s) described in this documentation at any time.

If there is any software on removable media described in this documentation, it is furnished under a license

agreement included with the product as a separate document, in the hard copy documentation, or on the

removable media in a directory file named LICENSE.TXT or !LICENSE.TXT. If you are unable to locate a copy,

please contact 3Com and a copy will be provided to you.

UNITED STATES GOVERNMENT LEGEND

If you are a United States government agency, then this documentation and the software described herein are

provided to you subject to the following:

All technical data and computer software are commercial in nature and developed solely at private expense.

Software is delivered as “Commercial Computer Software” as defined in DFARS 252.227-7014 (June 1995) or

as a “commercial item” as defined in FAR 2.101(a) and as such is provided with only such rights as are

provided in 3Com’s standard commercial license for the Software. Technical data is provided with limited rights

only as provided in DFAR 252.227-7015 (Nov 1995) or FAR 52.227-14 (June 1987), whichever is applicable.

You agree not to remove or deface any portion of any legend provided on any licensed program or

documentation contained in, or delivered to you in conjunction with, this User Guide.

Portions of this documentation are reproduced in whole or in part with permission from (as appropriate).

Unless otherwise indicated, 3Com registered trademarks are registered in the United States and may or may not

be registered in other countries.

3Com, the 3Com logo, Boundary Routing, EtherDisk, EtherLink, EtherLink II, LANsentry, LinkBuilder, Net Age,

NETBuilder, NETBuilder II, OfficeConnect, Parallel Tasking, SmartAgent, SuperStack, TokenDisk, TokenLink,

Transcend, and ViewBuilder are registered trademarks of 3Com Corporation. ATMLink, AutoLink, CoreBuilder,

DynamicAccess, FDDILink, NetProbe, PACE and Total Control are trademarks of 3Com Corporation. 3ComFacts

is a service mark of 3Com Corporation.

Artisoft and LANtastic are registered trademarks of Artisoft, Inc. Banyan and VINES are registered trademarks

of Banyan Systems Incorporated. CompuServe is a registered trademark of CompuServe Interactive

Services, Inc. DEC and PATHWORKS are registered trademarks of Digital Equipment Corporation. Intel and

Pentium are registered trademarks of Intel Corporation. AIX, AT, IBM, NetView, and OS/2 are registered

trademarks and Warp is a trademark of International Business Machines Corporation. Microsoft, MS-DOS,

Windows, and Windows NT are registered trademarks of Microsoft Corporation. Novell and NetWare are

registered trademarks of Novell, Inc. PictureTel is a registered trademark of PictureTel Corporation. UNIX is a

registered trademark of X/Open Company, Ltd. in the United States and other countries.

All other company and product names may be trademarks of the respective companies with which they are

associated.

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Introduction 1

How to Use This Guide 2

Conventions 2

Document Notation 3

Safety Information 4

Additional Safety Information 5

Year 2000 Compliance 5

1

O

VERVIEW

Introduction 1 - 1

What Is the OfficeConnect Remote 840? 1 - 2

What is an SDSL Modem? 1 - 3

What is ATM? 1 - 3

What is Frame Relay? 1 - 3

What is a BRouter? 1 - 4

Routing vs. Bridging 1 - 4

MAC-Encapsulated Routing 1 - 4

What is a Remote Site? 1 - 5

What is RFC 1483 1 - 6

Benefits of Using RFC 1483 1 - 7

What is RFC 1490? 1 - 7

What is PPP? 1 - 7

Benefits of Using PPP 1 - 7

What is DHCP? 1 - 7

What is DNS? 1 - 8

What is Address Translation? 1 - 8

What is DHCP Smart Mode? 1 - 8

What Is Default Bridge Mode? 1 - 9

What is Unconfigured Mode? 1 - 9

Getting Started Quickly 1 - 9

OfficeConnect Remote 840 Panel Features 1 - 10

Front Panel 1 - 10

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Back Panel 1 - 11

Configuration Overview 1 - 13

General Configuration Steps 1 - 13

How to Manage the OfficeConnect Remote 840 1 - 14

Starting the OfficeConnect Remote 840 Manager 1 - 15

OfficeConnect Remote 840 Manager Menus 1 - 15

Using the OfficeConnect Remote 840 Manager 1 - 16

Document Notation 1 - 16

Online Help 1 - 17

Where to Find More Configuration Information 1 - 17

2

S

YSTEM

A

DMINISTRATION

Performing System Administration Tasks 2 - 1

Controlling Login and Telnet Access 2 - 1

Adding a Login 2 - 2

Deleting a Login 2 - 2

Modifying the Date and Time 2 - 3

Restoring Factory Defaults 2 - 3

Using the OfficeConnect Remote 840 Manager to Restore Defaults 2 - 4

Using the Reset Button 2 - 4

Updating OfficeConnect Remote 840 Software 2 - 4

Controlling SNMP Access 2 - 4

Controlling TFTP Access 2 - 6

Assigning SNMP Trap Managers 2 - 7

Assigning Syslog Managers 2 - 8

3

R

EMOTE

S

ITE

M

ANAGEMENT

Introduction 3 - 1

Remote Site Overview 3 - 1

Managing a Remote Site Profile 3 - 2

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Adding a Remote Site Profile 3 - 2

Modifying a Remote Site Profile 3 - 3

Deleting a Remote Site Profile 3 - 3

Configuring Network Service Information (PPP / RFC 1483 / RFC 1490) 3 - 4

Frame Relay 3 - 5

Configuring ATM Information 3 - 6

ATM Modify Screen 3 - 6

Configuring Protocol Parameters 3 - 8

Monitoring Remote Site Connections 3 - 8

4

C

ONFIGURING

IP R

OUTING

Introduction 4 - 1

Overview 4 - 1

Enabling IP Routing 4 - 2

Configuring IP for the LAN 4 - 2

Adding a Local IP Network 4 - 3

Resetting Parameters 4 - 4

Modifying or Deleting an IP Network 4 - 4

Configuring IP RIP on the LAN 4 - 5

Local Site (LAN) RIP 4 - 5

Advanced RIP Modification Options 4 - 5

Resetting Parameters 4 - 6

Configuring IP for the Remote Site Connection 4 - 7

Configuring IP Parameters for the Remote Site 4 - 7

Configure the Remote Site IP Network Information 4 - 8

Configuring IP RIP on a Remote Site 4 - 10

Configuring IP Static and Framed Routes 4 - 11

Adding a Static IP Route to the LAN 4 - 11

Adding a Framed IP Route to a Remote Site 4 - 11

Using IP Address Validation 4 - 12

MAC-Encapsulated Routing 4 - 13

Monitoring 4 - 14

IP Testing (PING) 4 - 14

Option 1: OfficeConnect Remote 840 Manager Ping to ISP or Remote Site Network 4 - 14

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Ping Responses 4 - 15

DNS Errors 4 - 15

Option 2: DOS Ping to ISP or Remote Site Network 4 - 16

Option 3: Internet Browser (Internet Access Only) 4 - 17

Advanced Troubleshooting 4 - 17

5

C

ONFIGURING

B

RIDGING

Introduction 5 - 1

Overview 5 - 1

Configuring Bridging for the LAN 5 - 3

Adding a Bridge Network 5 - 3

Modifying or Deleting a Bridge Network 5 - 4

Configuring Bridging for the Remote Site Connections 5 - 4

Enabling Bridging 5 - 5

Bridging IP Traffic 5 - 5

MAC-Encapsulated Routing 5 - 6

Bridge Firewall 5 - 7

Advanced Bridging Options 5 - 9

Default Bridge Mode 5 - 10

Default Bridge Mode Overview 5 - 10

Installing the OfficeConnect Remote 840 Using Default Bridge Mode 5 - 11

Monitoring Bridging 5 - 11

Viewing Bridge Network Status 5 - 11

Viewing Bridge Forwarding Table 5 - 11

Viewing Bridge Counters 5 - 11

Testing Bridging 5 - 11

6

N

ETWORK

A

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Introduction 6 - 1

Selecting Address Translation 6 - 1

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Configuring the PAT Default Address 6 - 2

Configuring Static PAT Port Entries 6 - 3

Configuring NAT 6 - 4

Monitoring 6 - 5

7

C

ONFIGURING

DHCP

Introduction 7 -1

DHCP Overview 7 -1

Configuring the DHCP Mode 7 -2

Configuring the DHCP Server 7 -3

Configuring the DHCP Relay 7 -4

Monitoring DHCP 7 -4

DHCP Smart Mode Overview 7 -4

8

C

ONFIGURING

DNS

Introduction 8 - 1

DNS Overview 8 - 1

Configuring DNS 8 - 2

Configuring Remote DNS Servers 8 - 2

Configuring Static DNS Host Entries 8 - 4

9

C

ONFIGURING

IPX R

OUTING

Introduction 9 - 1

Overview 9 - 1

Configuring IPX for the LAN 9 - 2

Adding a Local IPX Network 9 - 2

Modifying or Deleting an IPX Network 9 - 3

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Configuring IPX for Remote Sites Connection 9 - 3

Configure the Remote Site IPX Network Information 9 - 4

Configuring IPX Static and Framed Routes 9 - 5

Adding a Static IPX Route to the Local Site (LAN) 9 - 5

Adding a Framed IPX Route to a Remote Site (WAN) 9 - 6

Configuring IPX Static and Framed Services 9 - 7

Adding a Static IPX Service to a Local Site (LAN) 9 - 8

Adding a Framed IPX Service to a Remote Site (WAN) 9 - 9

Configuring IPX RIP and SAP 9 - 10

Local Site (LAN) RIP and SAP 9 - 10

Remote Site (WAN) RIP and SAP 9 - 11

IPX Routing Configuration to Support MAC-Encapsulated Routing 9 - 12

Monitoring IPX 9 - 12

IPX Testing 9 - 12

10

U

PGRADING

O

PERATIONAL

S

OFTWARE

FOR

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Introduction 10 - 1

Obtaining Updated OfficeConnect Remote 840 Software 10 - 1

OfficeConnect Remote 840 CD 10 - 2

Installing Operational Software to the OfficeConnect Remote 840 Unit 10 - 2

Installing Software via OfficeConnect Remote 840 Manager 10 - 2

Installing Software via DOS 10 - 3

11

M

ONITORING

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Introduction 11 - 1

Overview 11 - 1

Throughput Performance 11 - 1

Ethernet Interface 11 - 3

Interface Status 11 - 3

Ethernet Counters 11 - 4

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11 - 5

Interface Status 11 - 5

ATM Status 11 - 5

ATM Cell Status 11 - 5

SDSL Transceiver Status 11 - 6

Remote Site Connection 11 - 7

Connection Traffic/Error Counters 11 - 7

ATM Site Counters 11 - 7

Frame Relay VC Site Counters 11 - 8

Remote Site Status Table 11 - 8

IP 11 - 8

IP Networks 11 - 8

ARP Table 11 - 9

IP, TCP, UDP, ICMP Counters and Tables 11 - 10

DHCP 11 - 10

DHCP Lease Table 11 - 10

DHCP Counters 11 - 11

Address Translation 11 - 11

Table of Mapped Addresses 11 - 11

Table of Port Assignments 11 - 12

IPX 11 - 13

IPX Networks 11 - 13

IPX Routes 11 - 13

IPX Services 11 - 14

Bridge 11 - 14

Bridge Networks 11 - 14

Forwarding Table 11 - 15

Bridge Counters 11 - 15

Events Logs 11 - 15

Connection Event Log 11 - 16

Critical Events Log 11 - 16

12

C

ONFIGURING

F

ILTERS

Introduction 12 - 1

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Filtering Overview 12 - 1

Filtering Capabilities 12 - 2

Filter Classes 12 - 2

Filter Types 12 - 2

Data Filters 12 - 2

Advertisement Filters 12 - 3

Generic Filters 12 - 3

Creating Filters Overview 12 - 4

Creating Filters Using the OfficeConnect Remote 840 Manager 12 - 4

OfficeConnect Remote 840 Manager Filter Screens 12 - 6

Filter Screens 12 - 7

12 - 9

Step-by-Step Guide to Creating Filters Using the OfficeConnect Remote 840 Manager 12 - 12

Modifying an Existing Filter Using the OfficeConnect Remote 840 Manager 12 - 13

Turning a Filter Off Using the OfficeConnect Remote 840 Manager 12 - 13

13

T

ROUBLESHOOTING

Introduction 13 - 1

Troubleshooting Tools 13 - 1

Troubleshooting Tables 13 - 2

How to Use these Tables 13 - 2

LAN Connection Problems 13 - 3

IP Wizard and Web Browser Problems 13 - 3

WAN Connection Problems 13 - 6

General Network Connection Problems 13 - 7

IP Network Connection Problems 13 - 9

IPX Network Connection Problems 13 - 12

Bridge Connection Problems 13 - 13

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A

B

RIDGING

AND

R

OUTING

Introduction A -1

Bridging and Routing Concepts A -1

Guidelines for Choosing Bridging or Routing A -2

How Bridges Learn A -2

Bridging Between Remote Sites A -3

Building a Larger Network A -4

Multiple Paths Between Bridge LANs A -5

Network Topology A -6

Broadcast Storms A -6

Optimum Use of Resource A -6

Network Organization, Structure, and Physical Layout A -6

The Internet A -7

Routing IP A -7

Open Systems Interconnection Network Layer Model A -8

IP Routing A -9

B

IP A

DDRESSING

Introduction to IP Addressing B - 1

IP Addressing Basics B - 1

Address Classes B - 1

Subnetting B - 1

Reserved Addresses B - 2

Supernetting (Advanced TCP/IP) B - 3

Supernetting and the OfficeConnect Remote 840 B - 4

IP Subnet Mask Address B - 5

IP Planning B - 5

Assigning IP Addresses and Subnetting B - 5

Single IP Address B - 6

Range of IP Addresses B - 6

IP Numbered and Unnumbered Links B - 7

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C

A

DDRESS

T

RANSLATION

T

UTORIAL

Overview C -1

Network Address Translation (NAT) C -2

NAT Example C -2

Dynamic NAT C -3

Static NAT C -4

Port Address Translation (PAT) C -4

PAT Example C -4

Dynamic PAT C -5

Static PAT C -5

Default PAT C -6

D

U

SING

THE

CLI G

UIDE

Overview D -1

Accessing the CLI from the OfficeConnect Remote 840 Manager D -1

E

C

ONFIGURATION

(N

ON

-S

ETUP

W

IZARD

)

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Instructions for Internet Access E - 1

Step 1: Configuring Remote Site General Information E - 1

Step 2: Configuring the Remote Site ATM Parameters (ATM Only) E - 4

Step 3: Configuring the Remote Site IP Network Information E - 4

Instructions for Telecommuting / Remote Office Access E - 7

Step 1: Configuring Remote Site General Information E - 7

Step 2: Configuring the Remote Site ATM Parameters E - 9

Step 3: Configuring the Remote Site IP Network Information E - 10

Step 4: Configuring the Remote Site IPX Network Information E - 12

Step 5: Configuring a Local IPX Network E - 13

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Step 6: Configuring a Local Bridge Network E - 13

Using the Configuration Audit E - 13

Saving the Configuration E - 14

Testing the Configuration E - 14

F

TECHNICAL SUPPORT

Online Technical Services F - 1

World Wide Web Site F - 1

Support from Your Network Supplier F - 1

Support from 3Com F - 2

Returning Products for Repair F - 2

3C

OM

C

ORPORATION

L

IMITED

W

ARRANTY

FCC C

LASS

B S

TATEMENT

FCC D

ECLARATION

OF

C

ONFORMITY

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Introduction

This guide describes the features and advanced configuration of the

OfficeConnectRemote 840 SDSL Router. The guide is intended for both

first-time and experienced computer network users who are using the

OfficeConnectRemote 840.

For information on the initial configuration of the unit, see the

OfficeConnect Remote 840 SDSL Router Installation Guide (included in

the box when your purchased your Router). That guide contains steps to

get the user started accessing the Internet or telecommuting to a remote

office.

This OfficeConnectRemote 840 SDSL Router User's Guide is intended to

be used for advanced configuration, presenting more detailed

information on the unit.

First-time users may want to read the tutorials in this Guide to help you

learn more about the networking technologies used by the

OfficeConnectRemote 840 SDSL Router.

The appendixes describe how to set up your router without using the

Setup Wizard.

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How to Use This

Guide

This table shows where to find specific information in this guide.

These and other user guides and release notes are available in Adobe

Acrobat Reader Portable Document Format (PDF) or HTML on the 3Com

World Wide Web site:

http://www.3com.com/ocr840

Conventions

Table 1 and Table 2 list conventions that are used throughout this guide.

If you are looking for: Turn to:

OfficeConnect Remote 840 Product Overview and

Configuration

Chapters 1, 2

Configuration of your Router (Remote Sites, IP Routing,

Bridging, NAT, DHCP, DNS, IPX Routing)

Chapter 3 – 9

Upgrading Software Chapter 10

Monitoring Capabilities Chapter 11

Configuring Filters Chapter 12

Troubleshooting Chapter 13

Information on the difference between Bridging and RoutingAppendix A

Information about IP Addressing Appendix B

Information on Address Translation Appendix C

Information on using the CLI Guide Appendix D

Information on Configuration Appendix E

Information on Technical Support Appendix F

Table 1 Notice Icons

Icon Notice Type Description

Information note Information that describes important features or

instructions

Caution Information that alerts you to potential loss of data or

potential damage to an application, system, or device

Warning Information that alerts you to potential personal injury

840ug.book Page 2 Friday, July 7, 2000 2:23 PM

Document Notation

3

Table 2 Text Convention

Document Notation

References to specific OfficeConnect Remote 840 Manager pages in this

document will use a specific notation to describe the location of a page

relative to the OfficeConnect Remote 840 Manager home page. The

notation uses the' >' character to indicate that a sub-menu on a page

must be accessed.

For example, to monitor the IP ARP Table you would (starting from the

home page) access the Monitor menu. From the Monitor menu you

would access the Networks sub-menu. From the Networks sub-menu you

Convention Description

Screen displays

This typeface represents information as it appears on the

screen.

Syntax

The word “syntax” means that you must evaluate the syntax

provided and then supply the appropriate values for the

placeholders that appear in angle brackets. Example:

To add a login user, use the following syntax:

Add user <name> password <password>

In this example, you must supply a user name for <name>

and a password for <password>.

Commands

The word “command” means that you must enter the

command exactly as shown and then press Return or Enter.

Commands appear in bold. Example:

To view the current login users, use the command:

list users

The words “enter”

and “type”

When you see the word “enter” in this guide, you must type

something, and then press Return or Enter. Do not press

Return or Enter when an instruction simply says “type.”

Keyboard key names If you must press two or more keys simultaneously, the key

names are linked with a plus sign (+). Example:

Press Ctrl+Alt+Del

Words in

italics

Italics are used to:

■

Emphasize a point.

■

Denote a new term at the place where it is defined in the

text.

■

Identify menu names, menu commands, and software

button names. Examples:

From the

Help

menu, select

Contents

.

Click

OK

.

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would access the IP sub-menu. Finally, from the IP sub-menu, you would

access the ARP Table page. This is specified as Monitor > Networks > IP

> ARP Table.

When accessing a page that requires data entry, press the Help icon

displayed in the Main area to obtain information about the each data

field on the page.

Safety Information

When using the unit, observe the following safety information:

■

Retain this user guide for later use and pass it on to subsequent

owners/managers of the unit.

■

The power adapter supplied with the unit is fitted with a molded plug

for connection to a standard electrical mains system supply socket. If

this plug is not suitable for connection to your mains supply, contact

your reseller for advice. Do not attempt to connect to the mains

supply using an inappropriate mains adapter.

■

Protect the unit from sudden, transient increases and decreases in

electrical power by fitting an in-line surge suppressor or

uninterruptible power supply.

■

Products manufactured by 3Com are safe and without risk provided

they are installed, used, and maintained in good working order and in

accordance with their instructions and recommendations.

■

Should any of the following conditions occur, isolate the electricity

supply and refer to your 3Com reseller.

■

If the case or cover is not correctly fitted.

■

If the case is damaged.

■

If the unit begins to make an odd noise, smell or smoke.

■

If the unit shows signs of a distinct change in performance.

■

Never install telephone wires during a thunder storm, or install

telephone connection sockets in wet locations (unless the socket is

specifically designed for wet locations).

■

Do not touch uninstalled telephone wires or terminals unless the

telephone line has been disconnected at the network interface.

Always exercise caution when installing or modifying telephone lines.

■

Do not use a telephone that is connected to the unit to report a gas

leak in the vicinity of the leak.

840ug.book Page 4 Friday, July 7, 2000 2:23 PM

Year 2000 Compliance

5

■

Do not use a telephone that is connected to the unit (other than a

cordless type) during an electrical storm. There may be a remote risk

of electric shock from lightning.

■

Do not spill food or liquids on the unit. If the unit gets wet, isolate the

electrical supply and contact your 3Com reseller.

■

Do not push any objects into the openings of the unit. Doing so can

cause fire or electric shock by shorting out internal components.

■

Ensure nothing rests on the unit's system cables and that the cables

are not located where they can be stepped on and cause damage to

the unit.

■

Keep the unit away from radiators and heat sources. Allow 25mm (1

inch) around the unit or stack to provide adequate air circulation.

■

Install the unit in a clean area that is free from dust or extreme

temperatures.

■

The unit has been designed to be a free standing unit. Do not place

anything else on top of the unit's case.

■

Allow a clearance gap of at least a 150 mm from the rear panel of the

unit, to allow for cable access.

■

This unit contains a lithium battery which is attached to a microchip

on the printed circuit board. The defective battery must be disposed of

safely in accordance with the manufacturers instructions.

Cette unité contient une pile au lithium attachée à une puce sur la

carte à circuit imprimé. Se débarrasser de la pile défectueuse en toute

sécurité conformément aux instructions du fabricant.

Additional Safety

Information

See the printed installation guide for additional important safety

information.

Year 2000

Compliance

For information on Year 2000 compliance and 3Com products, visit the

3Com Year 2000 web page:

http://www.3Com.com/products/yr2000.html

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