To download software upgrades, you must have a Juniper Networks Web account and a valid support contract. To obtain an account, complete the registration form at the Juniper Networks Web site: https://www.juniper.net/registration/Register.jsp.
Before an upgrade, back up your primary boot device onto a secondary storage device. If you have a power failure during an upgrade, the primary boot device can fail or become corrupted. In either case, if a backup device is not available, the device might be unable to boot and come back online. Creating a backup also stores your active configuration files and log files and ensures that you recover to a known, stable environment in case of an unsuccessful upgrade.
During a successful upgrade, the upgrade package completely reinstalls the existing software. It retains configuration files, log files, and similar information from the previous version.
Use either the J-Web interface or the CLI to back up the primary boot device on the secondary storage device listed in Table 175.
Table 175: Secondary Storage Devices for Backup
|
Storage Device |
Available on Routers |
Minimum Storage Required |
|---|---|---|
|
External compact flash |
J2320 and J2350 |
256 MB |
|
USB storage device |
All Services Routers |
256 MB |
After a successful upgrade, remember to back up the new current configuration to the secondary device.
For instructions about how to backup your system using the J-Web Interface, see Configuring a Boot Device for Backup with the J-Web Interface . For instructions about how to backup your system using the CLI, see Configuring a Boot Device for Backup with the CLI.