HP 7500 Switch Series - HP A7500-CMW520-R6626P02 Release Notes

HP A7500-CMW520-R6626P02 Release Notes
Hewlett-Packard Development Company, L.P.
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 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.
NOTE:
 HP recommends you to upgrade software from the CLI when your switch operates normally.
 To ensure that the active and standby MPUs use the same software version, upgrade them by using the
same method.
 Make sure the system software and Boot ROM are compatible. For the compatibility between the system
software and Boot ROM, see the hardware and software compatibility matrix in the Release Notes.
 You can upgrade the Boot ROM for the LPUs from the CLI only.
 The command outputs in this document are for reference only.
Upgrade from the CLI
The upgrade procedure on a standalone switch is different from that on an Intelligent Resilient Framework
(IRF) fabric. This section describes the following topics:
 Upgrading a standalone switch
 Upgrading an IRF fabric