Reverting to the Default Factory Configuration
If for any reason the current active configuration fails, you can revert to the default factory configuration. The default factory configuration contains the basic configuration settings. This is the first configuration of the switch, and it is loaded when the switch is first installed and powered on.
The load factory default command is a standard Junos OS configuration command. This configuration command replaces the current active configuration with the default factory configuration.
To revert the switch to the rescue configuration:
This process clears prior committed configuration parameters, except for those which preserve a Virtual Chassis configuration. This is how you can restore the factory default configuration on a Virtual Chassis (multiple devices configured to work together that look like a single device) without removing anything needed to keep the Virtual Chassis working.