HP A7500 Series Configuration Manual page 139

Verify the running status and current software version of each card with the display device
2.
command. Ensure that your switch has two MPUs and all cards operate normally.
Verify the system software image information with the display boot-loader command. Ensure that
3.
the active MPU and the standby MPU use the same system software image, which means the two
files have the same file path, name, and content.
Verify the active-standby state with the display switchover state command. Ensure that the standby
4.
MPU is in a real-time backup state, which is displayed as Realtime backup in the command output.
Use FTP, TFTP or some other method to copy the new system software image to the root directory
5.
of the storage medium on the active MPU and standby MPU respectively.
Use the dir command to verify that the new system software image and the old system software
6.
image exist on both the active MPU and the standby MPU respectively and that the file paths are
the same on both MPUs.
NOTE:
Avoid modifying the current configuration, rebooting a card, performing an active and standby
switchover, or deleting or modifying the system software image during an ISSU upgrade; otherwise,
upgrade failure may occur.
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