Configuration Guide System Upgrade Configuration
System Upgrade Configuration
Understanding Program Image in the System
The system image contains RGOS software. All Ruijie network devices are
embedded with specific version of images before distribution. The user may upgrade
such images to upgrade the device to the latest version. Use "show version"
command to find out the version of images running on the device and the name of
various main programs.
RGOS software involves the following types of images:
Main program: Also called MAIN, it is a complete image software package. It may
contain such images as boot program, line card program and etc. It will be loaded
and implement various services when device starts up. Users are generally using
and operating on the main program.
BOOT：The most fundamental device initialization and boot program. This image is
first image run on the device, and generally cannot be upgraded to ensure the
system can always be initialized, guided and upgraded (CTRL) correctly. This image
only exists in switching devices and line cards of the switch.
CTRL： This is a boot program provided with network functions. This program image
is initialized by BOOT, and features network communication function and main
program booting and upgrading function.
Bootloader: Device initialization, network communication and main program booting
and upgrading function. This is the first image loaded when the device is powered on,
and can boot the main program after device initialization. Routing devices only have
Bootloader and Main program. Bootloader has all functions of BOOT and CTRL.
Among the aforementioned program images, only the main program can be viewed,
upgraded and modified through file system commands. BOOT/CTRL/Bootloader
programs are generally stored in the parallel flash and cannot be managed directly
by user. For chassis devices, all line cards have BOOT and CTRL programs, while
some line cards may have the main program for line card. Generally, to have new
features of a device, you will need to upgrade the main program of the device. In
order to maintain the compatibility of BOOT, CTRL and Main programs, as well as
the compatibility of the Main program of management board and line card, the
upgrade function provides the guarantee to automatic compatibility. Incompatible
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