HP 7500 Switch Series - HP A7500-CMW520-R6635 Release Notes

HP A7500-CMW520-R6635 Release Notes
Hewlett-Packard Development Company, L.P.
23
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 A7500 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.
Normally, an .app file such as A7500.app is provided for upgrade, containing both the system software
image and Boot ROM image.
Patch files
Patch files are released to fix software defects. A patch file may contain one or more patches (or called
patch units). Patch files must be used together with the intended system software to fix the defects of the
latter, but not for adding or deleting features.
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.
Upgrade from the boot
menu
 Boot ROM
 System software
This method can be used when the switch cannot start up.
In-Service Software
Upgrade (ISSU)
System software
This method uses an active/standby
switchover mechanism to complete upgrade
and does not interrupt services. For more
information about ISSU, see the Fundamentals
Configuration Guide in the HP A7500 Switch
Series Configuration Guides.