Installing Software on an EX Series Switch with a Single Routing Engine (CLI Procedure)

1. Download the software package as described in Downloading Software Packages from Juniper Networks.
2. (Optional) Back up the current software configuration to a second storage option. See the Junos OS Installation and Upgrade Guide for instructions on performing this task.
3. (Optional) Copy the software package to the switch. We recommend that you use FTP to copy the file to the /var/tmp directory.

   This step is optional because Junos OS can also be upgraded when the software image is stored at a remote location. These instructions describe the software upgrade process for both scenarios.

4. Install the new package on the switch:
   user@switch> request system software add package

   Replace package with one of the following paths:

   • For a software package in a local directory on the switch—/var/tmp/package.tgz.
   • For a software package on a remote server:
     • ftp://hostname/pathname/package.tgz
     • http://hostname/pathname/package.tgz

   where package.tgz is, for example, jinstall-ex-4200-9.4R1.8-domestic-signed.tgz.

   Include the optional member option to install the software package on only one member of an EX4200 Virtual Chassis:

   user@switch> request system software add source member member-id reboot

   Other members of the Virtual Chassis are not affected. To install the software on all members of the Virtual Chassis, do not include the member option.

   Note: To abort the installation, do not reboot your device; instead, finish the installation and then issue the request system software delete package.tgz command, where package.tgz is, for example, jinstall-ex-8200-10.2R1.8-domestic-signed.tgz. This is your last chance to stop the installation.

5. Reboot to start the new software:
   user@switch> request system reboot
6. After the reboot has completed, log in and verify that the new version of the software is properly installed:

   user@switch> show version