Command:

backup interface


Mode:

Router(config-if)#


Syntax:

backup interface type number

no backup interface type number

 

Syntax Description:

type  number 

Interface type and port number to use as the backup interface

 

Command Description:

 

To configure an interface as a secondary or dial backup, use the backup interface interface configuration command. Use the no form of this command to disable this feature. The interface you define with this command can back up only one other interface. Routers support only serial and ISDN backup interfaces. Access servers support both asynchronous and serial backup interfaces.


Example:

The following example sets serial 1 as the backup line to serial 0:

Router(config)#interface serial 0
Router(config-if)#backup interface serial 1

The following example on the Cisco 7200 sets serial 2/2 as the backup line to
serial 1/1:

Router(config)#interface serial 1/1
Router(config-if)#backup interface serial 2/2


Misconceptions:

 

None


Related Commands:

 

None

 


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