backup interface dialer – Cisco IOS Command Reference

To configure a dialer interface as a secondary or dial backup, use the backup interface dialer command in interface configuration mode. To disable this feature, use the no form of this command.

backup interface dialer number

no backup interface dialer number

Syntax Description

Command Default

Disabled

Command Modes

Interface configuration

Command History

Usage Guidelines

Multiple dialer interfaces can use the same dialer pool, which might have a single ISDN interface as a member. Thus, that ISDN interface can back up different serial interfaces and can make calls to different sites.

Examples

The following example shows the configuration of a site that backs up two leased lines using one BRI. Two dialer interfaces are defined. Each serial (leased line) interface is configured to use one of the dialer interfaces as a backup. Both of the dialer interfaces use dialer pool 1, which has BRI 0 as a member. Thus, BRI 0 can back up two different serial interfaces and can make calls to two different sites.

interface dialer0

 ip unnumbered loopback0

 encapsulation ppp

 dialer remote-name Remote0

 dialer pool 1

 dialer string 5550112

 dialer-group 1

interface dialer1

 ip unnumbered loopback0

 encapsulation ppp

 dialer remote-name Remote1

 dialer pool 1

 dialer string 5550134

 dialer-group 1

interface bri 0

 encapsulation PPP

 dialer pool-member 1

 ppp authentication chap

interface serial 0

 ip unnumbered loopback0

 backup interface dialer 0

 backup delay 5 10

interface serial 1

 ip unnumbered loopback0

 backup interface dialer 1

 backup delay 5 10

backup interface dialer, no backup interface dialer

Cisco IOS Command Reference