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Installing the Software

Once you have backed up the current installation, you are ready to upgrade or downgrade your software:

Installing the Software Package on a Router with a Single Routing Engine

To upgrade the router software, follow these steps:

  1. Install the new software package using the request system software add command:

    user@host> request system software add validate /var/tmp/jinstall-9.2R1.8–domestic-signed.tgz
    For more information about the request system software add command, see the JUNOS System Basics and Services Command Reference.

  2. Reboot the router to start the new software using the request system reboot command:

    user@host>  request system reboot

    Reboot the system? [yes, no] (no) yes

    Note: You must reboot to load the new installation of the JUNOS software onto the router.

    To abort the installation, do not reboot your system; instead, finish the installation and then issue the request system software delete jinstall command. This is your last chance to stop the installation.

    The software is loaded when you reboot the system. Installation can take between 5 and 10 minutes. 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.

    While the software is being upgraded, the Routing Engine on which you are performing the installation does not route traffic.

  3. Log in and issue the show version command to verify the version of the software installed.
  4. (Optional) Add the jweb package using the request system software add command. Before you can add this package, you must first download the software as you did the installation package. For more information on downloading the jweb package, seeDownloading Software.

    The jweb installation module adds a router management graphical user interface that you can use to view and configure your router. For more information about the jweb package, see Installation Modules.

  5. After you have upgraded or downgraded the software and are satisfied that the new software is successfully running, issue the request system snapshot command to back up the new software.
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