Peforming a Recovery Installation

To perform a recovery installation, perform the following tasks:

Preparing to Reinstall the JUNOS Software

Depending on the situation, you should try to perform the following steps before you perform the recovery installation:

Ensure you have an emergency recovery disk to use during the installation. When the router is first shipped, an emergency recovery disk is provided with it. For instructions on creating an emergency boot disk, see Creating an Emergency Boot Disk
Copy the existing configuration in the file /config/juniper.conf.gz from the router to a remote system or the removable media. For extra safety, you can also copy the backup configurations (the files named /config/juniper.conf.n, where n is a number from 0 through 9).

Warning: The recovery installation process completely overwrites the entire contents of the fixed storage media.
Copy any other stored files.

To reinstall the JUNOS software:

Insert the removable media into the router.

Note: You can store a configuration on installation media such as a PC Card.
Reboot the router. Do not power off the router if it is already on. Issue the CLI request system reboot command.

When the software prompts you with the following question, type y:

WARNING: The installation will erase the contents of your disk. Do you wish to continue (y/n)? y

The router copies the software from the removable media onto your system, occasionally displaying status messages. Copying the software can take up to 10 minutes.
Remove the removable media when prompted. The router then reboots from the boot device on which the software was just installed. When the reboot is complete, the router displays the login prompt.