3Com 3C421600A Manuale di programmazione

http://www.3com.com/

SuperStack®II

Remote Access System 1500

System Management Guide

Release 2.0

Part No. 1.024.1797 Rev 2.00

December, 1999

3Com Corporation

5400 Bayfront Plaza

Santa Clara, California

95052-8145

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3Com may make improvements or changes in the product(s) and/or the program(s) described in this

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UNITED STATES GOVERNMENT LEGENDS:

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

provided to you subject to the following:

United States Government Legend: All technical data and computer software is 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, and SuperStack are registered trademarks of 3Com 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.

Other brand and product names may be registered trademarks or trademarks of their respective holders.

CONTENTS

ABOUT THIS GUIDE

Finding Specific Information in This Guide 13

Conventions 14

Related Documentation 15

Year 2000 Compliance 16

1OVERVIEW

Overview 18

Basic Configuration 18

Port Expansion Module Configuration 18

Primary Access Unit 18

Applications 18

Dial-In 18

Shared ISP 19

LAN-to-LAN 19

Individual Dial-Out 19

Comprehensive Security Options 20

Configuration Options 20

Web Configuration Interface 20

Command Line Interface 20

2USING THE COMMAND LINE INTERFACE

CLI Overview 22

Viewing Command Line Interface Help 22

Navigating the Command Line Interface 22

Obtaining Registered IP Addresses 23

Accessing the CLI 23

IBM Computer-compatible Computers 24

Macintosh Computers 24

UNIX-based Computers 24

Using CLI Quick Setup 24

Configuration with the CLI 25

Step One: Power On the RAS 1500 25

Step Two: Configure the RAS 1500 Basics 25

Step Three: Configure IP 26

Step Four: Configure IPX 27

Step Five: Configure DNS - Optional 30

Step Six: Configure SNMP - Optional 31

Step Seven: Save Your Work 31

64 Character Limit 32

Configuring a Manage User 32

Configuring Specific Modems 33

Configuring Modems in the Router Unit 33

Configuring Modems in the Port Expansion Unit 33

Configuring Modems in the Primary Access Unit 33

Configuring Expansion Units 34

Reconfiguring the Private IP Network 34

Replacing I/O Modules in the Port Expansion Unit 35

Disconnecting Expansion Units 35

Expansion Unit Configuration after Rebooting 35

Configuring the WAN Interface 36

Configuring Static Routes 36

IP Routes 36

IPX Routes 37

3WEB-BASED CONFIGURATION OF THE RAS 1500

Overview 39

Preparing the RAS 1500 for Web-based Management 41

Accessing the RAS 1500 for Web-based Management 43

Web-based Management of the RAS 1500 43

Basic Navigation 43

Setup Wizard 45

Configuration Pages 46

Accessing Help 48

Advanced Configuration 48

4CONFIGURING DIALOUT/IP

Overview 49

Dialout IP Verses Telnet 49

Before You Begin 50

Required Information 50

Optional Information 50

Configuring Your System For DialOut/IP Software 50

Configure the

RAS 1500 51

Configure Client Workstations 54

5CONFIGURING T

ELNET NETWORK DIAL-OUT

Overview 58

Using Telnet Network Dial-out 58

DialOut/IP Versus Telnet 59

Configuring and Using Telnet Network Dial-out 59

Before You Begin 59

Required Information 59

Optional Information 60

RAS 1500 Configuration 60

Computers on the Network 60

Configuring the RAS 1500 61

Step One: Add a System Name 61

Step Two: Add an IP Network 62

Step Three: Add a Modem Group (optional) 62

Step Four: Add the Dial-out Service 63

Step Five: Add Users 65

Step Six: Save Your Work 66

Configuring Network Computers 66

Dialing Out From a Network Computer 67

Case Study 67

6CONFIGURING NETWORK

DIAL-IN

Overview 70

Using Network Dial-In 70

Before You Begin 71

Required Information 71

Configuring the Remote Computer 71

Requirements 71

Communications Software 71

Communication Parameters 71

IP Addresses 72

Configuring RAS 1500 72

IP Address Pool Overview 72

Step One: Configure an IP Address Pool 73

Step Two: Configure IP Network Users 74

Step Three: Configure PPP Parameters 76

Step Four: Configure Additional Parameters 78

Using Callback and Roaming Callback 79

Overview 79

Configuring Callback Users 79

Calling Line Identification Callback 80

Overview 80

Call Handling 82

Configuring CLID Callback 84

Step One:

Add a CLID User 84

Step Two:

Configure the User CLID-callback Settings 84

Step Three:

Configure

CLID Security 86

Troubleshooting CLID Callback 87

Case Study 88

Network Callback User Case Study 88

Assumptions 88

How to Configure this User 88

How it Works 89

Network User Case Study 89

Assumptions 89

How to Configure this User 90

How it Works 90

7LAN-TO-LAN ROUTING

Overview 92

The Difference Between Bridging and Routing 92

Routing Overview 93

IP Routing Overview 94

Dynamic, Static, and Default Routes 95

How the RAS 1500 Routes Packets 95

Establishing Connections to Remote Gateways 96

Spoofing 96

Authentication 96

Before you Begin 97

Required Information 97

Configuring LAN-to-LAN Routing 98

Step One: Add the LAN-to-LAN User 98

Step Two: Configure the User Network Parameters 99

Step Three: Configure the User Dial-out Parameters 100

Step Four: Configure the User Routing Parameters 102

Step Five: Configure the User PPP Parameters 103

Step Six: Configure Phone Numbers 104

Step Seven: Configure Authentication 105

Step Eight: Save Your Work. 105

LAN-to-LAN Routing Case Study 105

Goals 105

Assumptions 105

Strategies 106

Configuring IP on Demand 110

8BRIDGING WITH THE RAS 1500

Overview 112

How the RAS 1500 Acts as a Bridge 112

When to Use Bridging 112

113

Bridging Tips 113

Enabling Bridging Over the LAN 113

Using FCP to Bridge with OfficeConnect Routers 114

Using Fast Connect Protocol 114

9CONFIGURING AN IP T

ERMINAL SERVER

Overview 119

Before You Begin 119

Configuring Remote Computers 119

Setting Communication Parameters 120

Configuring the RAS 1500 Login Hosts 120

Host Name 120

Address 120

Preference 120

Rlogin, Telnet and ClearTCP Ports 121

Configuring Login Users 121

Case Studies 124

Case Study A 124

Case Study B 126

10 ADVANCED MODEM CONFIGURATION WITH CLI/AT

COMMANDS

Overview 130

Before You Begin 130

Connecting to the RAS 1500 130

Accessing the Console Interface 130

AT Commands 130

Sending AT Command 130

Obtaining AT Command Help 131

Commonly Used AT Commands 131

Disconnecting with AT Commands 133

Configuring Data Compression Settings 134

Configuring Error Control Options 136

Using Error Control 137

Configuring Carrier Delay Times 138

Modifying Carrier Receive Delay 139

Configuring Link Option Settings 140

Link Speed Index 140

Obtaining Modem Call Information 144

Modem Query Commands 144

Working with Modem Memory 147

Viewing Settings 147

Saving a Phone Number to Flash Memory 148

Working with the Flash Memory Template 148

Configuring Modem Call Control Settings 149

Configuring 56 Kbps Technology 151

Factory-enabled Protocol 151

Controlling Server x2 151

Disabling V.34 Connections 152

Configuring ISDN 152

Enabling X.75 152

Frame Size 152

Window Size 152

Selecting Frame and Window Size 152

Relationships Between Frames and Windows 153

Viewing Current Frame and Window Size Settings 153

Best Possible Connection 153

Universal Connect Call Flow 154

Answering and Originating Calls 154

Setting the Originate Call Type 154

11 CONFIGURING THE RAS 1500 ROUTER

Reconfiguring Your System 157

Customizing CLI Parameters 157

Discarding and Renaming Files 161

Communicating with Remote and Local Sites 161

Dial, Disconnect, and Hangup Commands 161

Exiting the CLI 162

Network Services 163

Troubleshooting Commands 168

Viewing Facility Errors 168

Terminating an Active Process 168

Resolving Addresses 169

Resolving Host Names 169

Using Ping 169

Viewing RAS 1500 System Information 172

Viewing Interface Status, Settings 172

Monitor PPP Activity 172

Displaying System Information 173

List Commands 173

Show Commands 173

12 USING SECURITY AND ACCOUNTING

Authentication Overview 177

Local Authentication 178

RADIUS Authentication 178

Overview 178

RADIUS Authentication Process 179

Configuring RADIUS Authentication on the RAS 1500 180

NOS Authentication 182

Overview 182

NOS Authentication Process 183

Installation Overview 183

Installing and Configuring NOS Authentication Software

(Novell NetWare) 183

Installing and Configuring NOS Authentication Software

(Windows NT) 189

Changing Encryption Key 191

Configuring NOS Authentication on the RAS 1500 192

Troubleshooting NOS Authentication 195

RADIUS Accounting 195

Configuring RADIUS Accounting 196

Enabling and Disabling RADIUS Accounting 198

13 USING FRAME RELAY

Overview 202

What is Frame Relay? 202

Permanent and Switched Virtual Circuits 202

Data Link Connection Identifier 202

Committed Information Rate 203

Forward and Backward Explicit Congestion Notifications 203

Local Management Interface 203

Supporting Frame Relay 203

Congestion Control 203

Before You Begin 206

Basic Frame Relay Configuration Using the Command Line Interface 206

Frame Relay User Configuration 206

Frame Relay Data Link Configuration 208

Frame Relay PVC Configuration 209

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