Cisco CISCO851-K9 - 851 Integrated Services Router

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14-14

Cisco 850 Series and Cisco 870 Series Access Routers Software Configuration Guide

OL-5332-01

Chapter 14 Troubleshooting

Managing Your Router with SDM

Main Page

Default Chapter1
- Configuration Guide1
- Table of Contents3
Preface11
- Audience11
- Organization11
- Conventions11
  - Notes, Cautions, and Timesavers13
  - Command Conventions13
- Related Documents14
- Obtaining Documentation and Submitting a Service Request14
Basic Router Configuration17
- Interface Port Labels17
- Viewing the Default Configuration18
Chapter 1 Basic Router Configuration19
- Configuring Basic Parameters21
- Configuring Static Routes27
- Configuring Dynamic Routes28
  - Configuring Rip29
- Configuring Enhanced IGRP30
  - Configuration Example31
  - Verifying Your Configuration31
Configuring Your Router for Ethernet and DSL Access33
Chapter 2 Sample Network Deployments35
Chapter 3 Configuring PPP over Ethernet with NAT35
- Configure the Virtual Private Dialup Network Group Number38
- Configure the Fast Ethernet WAN Interfaces39
- Configure the Dialer Interface40
- Configure Network Address Translation42
- Configuration Example44
  - Verifying Your Configuration45
Chapter 4 Configuring PPP over ATM with NAT47
- Configure the Dialer Interface49
- Configure the ATM WAN Interface51
- Configure DSL Signaling Protocol52
  - Configuring ADSL52
    - Verify the Configuration53
  - Configuring SHDSL53
    - Global Configuration Mode54
    - Verify the Configuration54
- Configure Network Address Translation55
- Configuration Example57
  - Verifying Your Configuration58
Chapter 5 Configuring a LAN with DHCP and Vlans59
- Configure DHCP60
  - Configuration Example62
  - Verify Your DHCP Configuration62
- Configure Vlans63
  - Assign a Switch Port to a VLAN64
  - Verify Your VLAN Configuration64
Chapter 6 Configuring a VPN Using Easy VPN and an Ipsec Tunnel67
- Configure the IKE Policy70
- Configure Group Policy Information71
- Apply Mode Configuration to the Crypto Map72
- Enable Policy Lookup72
- Configure Ipsec Transforms and Protocols73
- Configure the Ipsec Crypto Method and Parameters74
- Apply the Crypto Map to the Physical Interface75
- Create an Easy VPN Remote Configuration76
- Verifying Your Easy VPN Configuration77
- Configuration Example77
Chapter 7 Configuring Vpns Using an Ipsec Tunnel and Generic Routing Encapsulation79
- Configure a VPN80
- Configure a GRE Tunnel86
- Configuration Example87
Chapter 8 Configuring a Simple Firewall91
- Configure Access Lists93
- Configure Inspection Rules93
- Apply Access Lists and Inspection Rules to Interfaces94
- Configuration Example95
Chapter 9 Configuring a Wireless LAN Connection97
- Configure the Root Radio Station98
- Configure Bridging on Vlans100
- Configure Radio Station Subinterfaces102
- Configuration Example103
Chapter 10 Sample Configuration105
Configuring Additional Features and Troubleshooting111
CHAPTER 11 Additional Configuration Options113
CHAPTER 12 Configuring Security Features115
- Authentication, Authorization, and Accounting115
- Configuring Autosecure116
- Configuring Access Lists116
  - Access Groups117
    - Guidelines for Creating Access Groups117
- Configuring a CBAC Firewall117
- Configuring Cisco IOS Firewall IDS118
- Configuring Vpns118
Chapter 13 Configuring Dial Backup and Remote Management119
- Dial Backup Feature Activation Methods119
- Dial Backup Feature Limitations123
  - Configuration Example124
- Configuring Dial Backup and Remote Management through the Console or Auxiliary Port127
  - Configuration Tasks128
  - Configuration Example131
- Configuring Dial Backup and Remote Management through the ISDN S/T Port134
  - Configuration Tasks135
    - Configure ISDN Settings135
    - Configure the Aggregator and ISDN Peer Router138
Chapter 14 Troubleshooting141
- Getting Started141
- Before Contacting Cisco or Your Reseller141
- ADSL Troubleshooting142
- SHDSL Troubleshooting142
- ATM Troubleshooting Commands142
- Reference Information155
Appendix157
- Cisco IOS Software Basic Skills157
Appendix165
- B Concepts165
Appendix177
ROM Monitor177
- Entering the ROM Monitor177
- ROM Monitor Commands178
- Command Descriptions179
- Disaster Recovery with TFTP Download179
  - TFTP Download Command Variables180
    - Required Variables180
    - Optional Variables181
  - Using the TFTP Download Command181
- Configuration Register182
  - Changing the Configuration Register Manually182
  - Changing the Configuration Register Using Prompts182
- Console Download183
  - Command Description184
  - Error Reporting184
- Debug Commands184
- Exiting the ROM Monitor186
Appendix187
Common Port Assignments187
I N D E X189
- Configuration Example193
- Interface Port Labels193

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