Specifications
Table Of Contents
- Contents
- Preface
- Getting Started
- Basic Router Configuration
- Interface Port Labels
- Viewing the Default Configuration
- Information Needed for Configuration
- Configuring Basic Parameters
- Configuring Static Routes
- Configuring Dynamic Routes
- Configuring Enhanced IGRP
- Basic Router Configuration
- Configuring Your Router for Ethernet and DSL Access
- Sample Network Deployments
- Configuring PPP over Ethernet with NAT
- Configuring PPP over ATM with NAT
- Configuring a LAN with DHCP and VLANs
- Configuring a VPN Using Easy VPN and an IPSec Tunnel
- Configure the IKE Policy
- Configure Group Policy Information
- Apply Mode Configuration to the Crypto Map
- Enable Policy Lookup
- Configure IPSec Transforms and Protocols
- Configure the IPSec Crypto Method and Parameters
- Apply the Crypto Map to the Physical Interface
- Create an Easy VPN Remote Configuration
- Verifying Your Easy VPN Configuration
- Configuration Example
- Configuring VPNs Using an IPSec Tunnel and Generic Routing Encapsulation
- Configuring a Simple Firewall
- Configuring a Wireless LAN Connection
- Sample Configuration
- Configuring Additional Features and Troubleshooting
- Additional Configuration Options
- Configuring Security Features
- Configuring Dial Backup and Remote Management
- Troubleshooting
- Reference Information
- Cisco IOS Software Basic Skills
- Concepts
- ROM Monitor
- Common Port Assignments

A-4
Cisco 1800 Series Integrated Services Routers (Fixed) Software Configuration Guide
OL-6426-02
Appendix A Cisco IOS Software Basic Skills
Getting Help
Getting Help
You can use the question mark (?) and arrow keys to help you enter commands.
For a list of available commands at that command mode, enter a question mark:
Router> ?
access-enable Create a temporary access-list entry
access-profile Apply user-profile to interface
clear Reset functions
...
To complete a command, enter a few known characters followed by a question mark (with no space):
Router> s?
* s=show set show slip systat
For a list of command variables, enter the command followed by a space and a question mark:
Router> show ?
...
clock Display the system clock
dialer Dialer parameters and statistics
exception exception information
...
To redisplay a command you previously entered, press the Up Arrow key. You can continue to press the
Up Arrow key for more commands.
Router
configuration
Enter one of the router
commands followed by
the appropriate
keyword, for example
router rip, from
global configuration
mode.
Router
(config-
router)#
• To exit to global
configuration mode,
enter the exit command.
• To exit to privileged
EXEC mode, enter the
end command, or press
Ctrl-Z.
Use this mode to configure an IP
routing protocol.
Line
configuration
Enter the line
command with the
desired line number,
for example, line 0,
from global
configuration mode.
Router
(config-
line)#
• To exit to global
configuration mode,
enter the exit command.
• To exit to privileged
EXEC mode, enter the
end command, or press
Ctrl-Z.
Use this mode to configure
parameters for the terminal line.
Table A-2 Command Modes Summary (continued)
Mode Access Method Prompt Exit and Entrance Method About This Mode