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-7
Cisco 1800 Series Integrated Services Routers (Fixed) Software Configuration Guide
OL-6426-02
Appendix A Cisco IOS Software Basic Skills
Saving Configuration Changes
Saving Configuration Changes
You need to enter the copy running-config startup-config command to save your configuration
changes to nonvolatile RAM (NVRAM) so that they are not lost if there is a system reload or power
outage. This example shows how to use this command to save your changes:
router# copy running-config startup-config
Destination filename [startup-config]?
Press Return to accept the default destination filename startup-config, or enter your desired destination
filename and press Return.
It might take a minute or two to save the configuration to NVRAM. After the configuration has been
saved, the following message appears:
Building configuration...
router#
Summary
Now that you have reviewed some Cisco IOS software basics, you can begin to configure your router.
Remember:
• You can use the question mark (?) and arrow keys to help you enter commands.
• Each command mode restricts you to a set of commands. If you are having difficulty entering a
command, check the prompt, and then enter the question mark (?) for a list of available commands.
You might be in the wrong command mode or using the wrong syntax.
• If you want to disable a feature, enter the keyword no before the command; for example, no ip
routing.
• Save your configuration changes to NVRAM so that they are not lost if there is a system reload or
power outage.
Where to Go Next
To configure your router, go to Chapter 1, “Basic Router Configuration,” and Chapter 2, “Sample
Network Deployments.”