# boot backup

#### Syntax

boot backup relFilename { cnfFilename | scrFilename | factory-defaults }

no boot backup

#### Release Information

Command introduced before JunosE Release 7.1.0.

#### Description

Sets the release and the configuration to be used the next (and every subsequent) time the boot logic chooses backup mode. The no version removes the setting.

#### Options

- relFilename—System software file
- cnfFilename—Name of an existing configuration file (.cnf)
- scrFilename—Name of an existing script file (.scr)
- factory-defaults—Specifies that the router reverts to factory default configuration when rebooted

#### Mode

Global Configuration