Command:

backup delay


Mode:

Router(config-if)#


Syntax:

backup delay {enable-delay | never }{disable-delay | never}

no backup delay {enable-delay | never }{disable-delay | never}


Syntax Description:

enable-delay 

Number of seconds that elapse after the primary line goes down before the Cisco IOS software activates the secondary line

disable-delay 

Number of seconds that elapse after the primary line comes up before the Cisco IOS software deactivates the secondary line

never

Prevents the secondary line from being activated or deactivated

 

Command Description:

To define how much time should elapse before a secondary line status changes after a primary line status has changed, use the backup delay interface configuration command. Use the no form of this command to return to the default, so that as soon as the primary fails, the secondary is immediately brought up without delay.

For environments in which false signal disruptions appear as intermittent lost carrier signals, we recommend that you enable some delay before activating and deactivating a secondary line.

Example:

The following example sets a 10-second delay on deactivating the secondary line (serial interface 0). However, line S0 is activated immediately.

Router(config)#interface serial 0
Router(config-if)#backup delay 0 10


Misconceptions:

 

None


Related Commands:

 

None


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