Juniper Networks releases several new versions of JUNOS software each year, as needed. This section will prepare you to perform a JUNOS software upgrade to the Router.
root@sysadmin>show system software
To upgrade your software, there are several simple steps
1. Download the software package(s) you need from the Juniper Networks Web site.
2. Perform a system backup on the router you wish to upgrade.
3. Copy the software package(s) to the router you wish to upgrade.
4. Add the new software package(s) to the router you wish to upgrade[ This will effectively delete the old packages ].
5. Reboot the Router.
Backing Up the System
root@sysadmin>request system snapshot
It creates a recoverable snapshot of the current system. However, will make the running and backup versions of the software identical and will mean that you cannot revert back to the original version that shipped with the router.
Copying the Package(s) to the Router by using FTP SCP
root@sysadmin#file copy ftp://username:firstname.lastname@example.org/ filename
Upgrading the Package
Once the files have been copied to the hard disk, upgrade the software using the following command
root@sysadmin>request system software add package-name
Finishing the Upgrade
root@sysadmin>request system reboot