HP 12500 Configuration Manual page 123

If the switching fabric cards of the device support sequential upgrade, make sure the device has
two or more such cards and the cards are operating properly.
Make sure nothing is wrong with the hardware and no hardware upgrade is going on.
Otherwise, an upgrade failure or system exception might occur.
During an ISSU:
•
Do not reboot, install, or remove any card, and make sure the network topology is stable.
Do not execute any command that is not relevant to the ISSU process.
Make sure you are the only one who is logged in to the device and no other administrators will
log in during the upgrade.
Do not modify, delete, or rename any image files.
•
The issu series configuration commands and the install series configuration commands are mutually
•
exclusive. You can use only one series of configuration commands for one ISSU process. However,
you can use the install series displaying and maintaining commands with the issu series
configuration commands.
To configure the device after an ISSU, you must relog in to the device.
•
• All MDCs on a device run the same image files. To upgrade the MDCs, you only need to perform
the upgrade on the default MDC for once.
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