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
CHAPTER
14-1
Cisco 1800 Series Integrated Services Routers (Fixed) Software Configuration Guide
OL-6426-02
14
Troubleshooting
Use the information in this chapter to help isolate problems you might encounter or to rule out the router
as the source of a problem. This chapter contains the following sections:
• Getting Started
• Before Contacting Cisco or Your Reseller
• ADSL Troubleshooting
• SHDSL Troubleshooting
• PortFast Troubleshooting
• ATM Troubleshooting Commands
• Software Upgrade Methods
• Recovering a Lost Password
• Managing Your Router with SDM
Getting Started
Before troubleshooting a software problem, you must connect a terminal or PC to the router using the
light-blue console port. (For information on making this connection, see the documentation listed in the
“Related Documents” section on page 14.) With a connected terminal or PC, you can view status
messages from the router and enter commands to troubleshoot a problem.
You can also remotely access the interface (Ethernet, ADSL, or telephone) by using Telnet. The Telnet
option assumes that the interface is up and running.
Before Contacting Cisco or Your Reseller
If you cannot locate the source of a problem, contact your local reseller for advice. Before you call, you
should have the following information ready:
• Chassis type and serial number
• Maintenance agreement or warranty information
• Type of software and version number
• Date you received the hardware
• Brief description of the problem