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Software upgrade configuration
Switch software overview
Switch software includes the Boot ROM and the system software images. After powered on, the device
runs the Boot ROM image, initializes the hardware, and displays the hardware information. Then the
device runs the system software image, which provides drivers and adaption for hardware, and
implements service features. The Boot ROM and system software images are required for the startup and
running of a device.
Figure 41 Relationship between the Boot ROM program and the system software images
Software upgrade methods
You can upgrade both Boot ROM and system software at the Boot menu or at the command line interface
(CLI). The following sections cover how to upgrade them at the CLI. For instructions about how to upgrade
them at the Boot menu, see the installation manual of your switch.
Upgrading at the CLI falls into the following categories:
Upgrade method Upgrade object
Description
Upgrading the Boot ROM
program through a system
reboot
Boot ROM image
• You need to reboot the whole system to upgrade the
software of a switch.
• This causes running service interruption during the
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