H3C Technologies H3C S7500E Series Switches - Manual (Page 2)

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Software upgrade
CAUTION:
Upgrade software only when necessary and under the guidance of a technical support engineer.
Software used for upgrade
Boot ROM images
Boot ROM images are used to upgrade the Boot ROM program of cards, including the main processing
units (MPUs) and line processing units (LPUs). A Boot ROM image is a .btw file.
System software images
System software images are used at switch startup. The S7500E series support two types of system
software image:
• Main system software image—The default system software image a switch uses for startup.
• Backup system software image—The system software image a switch uses for startup when the
main system software image is invalid or does not exist.
NOTE:
Generally, there is no need to upgrade the Boot ROM program independently. The device uses the
shipped Boot ROM program. If a separate upgrade is required, do that under the guidance of an H3C
technical support engineer.
Patch package file
Patches for the S7500E switches are released in a patch package file.
A patch package file fixes certain software defects. It contains patch files for multiple cards. It enables
you to use one command to bulk-fix bugs for multiple cards.
A patch package file corresponds to the system software image version. A patch package file can only
fix defects of the corresponding system software image file, but does not add or delete any functions.
Upgrade methods
You can upgrade switch software by using one of the following methods:
Upgrade mode Object Remarks
Upgrade from the CLI
• Boot ROM
• System software
• Reboot the switch to validate the upgrade.
• This method interrupts services.
Patches
This method does not interrupt services, and fixes the
target system software only.