User Guide

Table of Contents 7
Sample Configurations 101
Chapter 5. Command Line Interface Reference 109
Command Line Interface Conventions 109
Command Input 109
Command Output 109
Command Organization 109
? or HELP 110
System-Level Commands 111
Frame Statistics 113
Router Configuration Commands 120
Target Router System Configuration Commands (SYSTEM) 121
Target Router Ethernet LAN Bridging and Routing (ETH) 134
Remote Router Access Configuration (REMOTE) 143
Asymmetric Digital Subscriber Line Commands (ADSL) 166
Asynchronous Transfer Mode Commands (ATM) 168
DMT Command 171
Dual-Ethernet Router Commands (ETH) 172
High-Speed Digital Subscriber Line Commands (HDSL) 176
ISDN Digital Subscriber Line (IDSL) 179
Symmetric Digital Subscriber Line Commands (SDSL) 181
Dynamic Host Configuration Protocol Commands (DHCP) 185
L2TP — Virtual Dial-Up Configuration (L2TP) 196
Bridge Filtering Commands (FILTER BR) 204
Save Configuration Commands (SAVE) 206
Erase Configuration Commands (ERASE) 208
File System Commands 210
Chapter 6. Managing the Router 215
Simple Network Management Protocol (SNMP) 215
Telnet Remote Access 216
Client TFTP Facility 216
TFTP Server 216
BootP Server 217
Boot Code 217
Manual Boot Menu 217
Identifying Fatal Boot Failures 221
Software Kernel Upgrades 221
Booting and Upgrading from the LAN 221
Upgrading from the WAN Line 223
Backup and Restore Configuration Files 224
Backup Configuration Files (Recommended Procedure) 224
Restore Configuration Files 224
FLASH Memory Recovery Procedures 225
Recovering Kernels for Routers with Configuration Switches 225
Recovering Kernels for Routers with a Reset Button 226
Recovering Passwords and IP Addresses 227
Routers with Configuration Switches 227
Routers with a Reset Button 228
Batch File Command Execution 228
Chapter 7. Troubleshooting 231
Diagnostic Tools 231
Using LEDs 231