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Software upgrade methods
The Boot ROM program and system boot file can both be upgraded at the Boot ROM menu or at the CLI. The
following sections describe upgrading through command lines. For instructions about how to upgrade
through the Boot ROM menu, see the release notes of your switch.
Upgrading at the CLI falls into the following categories:
Upgrade method
Upgrade
ob
ect
Description
Upgrading the boot ROM program
through a system reboot
Boot
ROM
program
• You must reboot the whole system to upgrade the
software of a device.
• This causes running service interruption during the
upgrade process, and is not recommended.
Upgrading the boot file through a
system reboot
System
boot file
Upgrading IRF member switch
Software upgrade by installing
hotfixes
System
boot file
• Hotfix is a fast, cost-effective method to repair software
defects of a device.
• Compared with software version upgrade, hotfix can
upgrade the software without interrupting the running
services of the device. It can repair the software defects
of the current version without rebooting the device.
• The patch files match the device model and software
version. If they are not matched, the hotfixing operation
fails.
ISSU
System
boot file
• In-Service Software Upgrade (ISSU) enables software
upgrade and ensures continues packet forwarding.
• For more information, see ISSU configuration in the
Fundamentals Configuration Guide
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