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Cisco 819 Series Integrated Services Routers Software Configuration Guide
OL-23590-02
Chapter 6 Configuring Backup Data Lines and Remote Management
Configuring Backup Interfaces
To configure your router with a backup interface, perform these steps, beginning in global configuration
mode:
SUMMARY STEPS
1. interface type number
2. backup interface interface-type interface-number
3. exit
DETAILED STEPS
Command Purpose
Step 1
interface type number
Example:
Router(config)# interface xxx 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.
Step 2
backup interface interface-type
interface-number
Example:
Router(config-if)# backup interface serial
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 serial interface configured
as the backup interface for the ATM 0 interface.
Step 3
exit
Example:
Router(config-if)# exit
Router(config)#
Exits the configuration interface mode.