3Com 3C421600A Programming manual

®
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
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Santa Clara, California
95052-8145
Copyright © 1999, 3Com Corporation. All rights reserved. No part of this documentation may be reproduced
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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