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
13-2
Cisco 1800 Series Integrated Services Routers (Fixed) Software Configuration Guide
OL-6426-02
Chapter 13 Configuring Dial Backup and Remote Management
Dial Backup Feature Activation Methods
Note Even if the backup interface comes out of standby mode (is brought up), the router does not trigger the
backup call unless it receives the specified traffic for that backup interface.
Configuring Backup Interfaces
Perform these steps to configure your router with a backup interface, beginning in global configuration
mode:
Floating Static Routes
Floating static routes provide alternative routes for traffic. Floating static routes are not activated unless
a DDR backup call has been triggered by specified traffic for a backup interface.
Floating static routes are independent of line protocol status. This is an important consideration for
Frame Relay circuits because the line protocol may not go down if the data-link connection identifier
(DLCI) is inactive. Floating static routes are also encapsulation independent.
Note When static routes are configured, the primary interface protocol must go down in order to activate the
floating static route.
Command Purpose
Step 1
interface type number
Example:
Router(config)# interface atm 0
Router(config-if)#
Enters interface configuration mode for the
interface for which you want to configure backup.
This can be a serial interface, ISDN interface, or
asynchronous interface.
The example shows the configuration of a backup
interface for an ATM WAN connection.
Step 2
backup interface interface-type
interface-number
Example:
Router(config-if)# backup interface bri 0
Router(config-if)#
Assigns an interface as the secondary, or backup
interface.
This can be a serial interface or asynchronous
interface. For example, a serial 1 interface could
be configured to back up a serial 0 interface.
The example shows a Basic Rate Interface
configured as the backup interface for the ATM 0
interface.
Step 3
exit
Example:
Router(config-if)# exit
Router(config)#
Enters global configuration mode.