Juniper JUNOS 10.2, Upgrade Manual

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When the
request system snapshot
command is issued, the
/root
file system is backed
up to /altroot , and /config is backed up to /altconfig . The /root and /config file systems
are on the router’s CompactFlash card, and the /altroot and /altconfig file systems
are on the router’s hard disk. When the backup is completed, the current and backup
software installations are identical.
To copy the files to the router’s hard disk, use the following command:
user@host> request system snapshot
Backing Up the Current Installation (J Series Routers)
You should back up the current installation so that you can return to the current
software installation. In a dual Routing Engine system, you need to back up both
Routing Engines. This section covers the following:
The installation process using the installation package ( junos-jsr* ) removes all stored
files on the router except the
juniper.conf
and SSH files. Therefore, you should back
up your current configuration in case you need to return to the current software
installation after running the installation program.
These instructions offer the minimum steps required to create a backup during the
installation process. For a complete description of the backup process on the J Series
routers, see the
J Series Services Router Administration Guide and the JUNOS Software
Systems Basics Configuration Guide .
To back up the JUNOS Software on the J Series routers:
1.
Attach an external memory device to the router.
NOTE: Even when attached to a J Series router, the USB memory device is not listed
as a storage device in the show system storage CLI command output. You can view
the installed USB memory device on the J-Web interface’s system monitor screen.
2.
Issue the
request system snapshot media usb
command.
The current software installation and configuration are saved on the external
USB storage device.
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 /var/tmp/ installation-package
installation-package
is the name of the installation package; for example
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 .
Backing Up the Current Installation (J Series Routers)
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Chapter 4: Completing a Standard or Change Category Installation