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
14-11
Cisco 1800 Series Integrated Services Routers (Fixed) Software Configuration Guide
OL-6426-02
Chapter 14 Troubleshooting
Recovering a Lost Password
Reset the Router
To reset the router, follow these steps:
Step 1 If break is enabled, go to Step 2. If break is disabled, turn the router off (O), wait 5 seconds, and turn it
on (|) again. Within 60 seconds, press the Break key. The terminal displays the ROM monitor prompt.
Go to
Step 3.
Note Some terminal keyboards have a key labeled Break. If your keyboard does not have a Break key,
see the documentation that came with the terminal for instructions on how to send a break.
Step 2 Press break. The terminal displays the following prompt:
rommon 2>
Step 3 Enter confreg 0x142 to reset the configuration register:
rommon 2> confreg 0x142
Step 4 Initialize the router by entering the reset command:
rommon 2> reset
The router cycles its power, and the configuration register is set to 0x142. The router uses the boot ROM
system image, indicated by the system configuration dialog:
--- System Configuration Dialog ---
Step 5 Enter no in response to the prompts until the following message is displayed:
Press RETURN to get started!
Step 6 Press Return. The following prompt appears:
Router>
Step 7 Enter the enable command to enter enable mode. Configuration changes can be made only in enable
mode:
Router> enable
The prompt changes to the privileged EXEC prompt:
Router#
Step 8 Enter the show startup-config command to display an enable password in the configuration file:
Router# show startup-config
If you are recovering an enable password, omit the following “Reset the Password and Save Your
Changes” section, and complete the password recovery process by performing the steps in the “Reset the
Configuration Register Value” section.
If you are recovering an enable secret password, it is not displayed in the show startup-config command
output. Complete the password recovery process by performing the steps in the following
“Reset the
Password and Save Your Changes” section.