System Software Version Rollback; Issu Configuration; Issu Configuration Task List - H3C S5500-HI Series Fundamentals Configuration Manual

Table 12 ISSU state description
State
Init (Initial state)
Load
Switchover
Accept
Commit

System software version rollback

The H3C S5500-HI switch series supports version rollback during ISSU. When ISSU fails to proceed on
an IRF member switch (for example, the new system software image file is broken), you can use this
feature to revert system software to the previous version.
The S5500-HI switches support the following version rollback methods.
Automatic rollback
When you reboot the specified slave switch with the issu load command, the system automatically
creates a configurable version rollback timer.
When you use the compatible ISSU method: If you do not execute the issu accept command on the
•
specified slave switch or you do not execute the issu commit command on any other member switch
before the rollback timer expires, the system automatically stops the ISSU upgrade and rolls back
the system software image of the upgraded IRF member switches to the previous version.
• When you use the incompatible ISSU method: If you do not execute the issu run switchover
command to upgrade all the IRF member switches that have not been upgraded in one operation
before the rollback timer expires, the system automatically rolls back the system software image of
all the upgraded IRF member switches to the previous version.
For information about compatible and incompatible ISSU methods, see
check."
Manual rollback
You can use the issu rollback command to roll back the system software image of an IRF member switch
to the previous version. Whether manual rollback can be configured for an IRF member switch depends
on the ISSU state. For more information, see

ISSU configuration

ISSU configuration task list

Complete these tasks to configure ISSU:
Remarks
No ISSU starts or an ISSU upgrade has completed.
A slave switch is being upgraded or has been upgraded. To stop the loading
process, perform a manual or automatic roll back to revert system software to its
original version.
The master is being rebooted to trigger a new master election.
The ISSU has been accepted. To stop the loading process, you have to perform a
manual roll back to revert system software to its original version. The automatic roll
back function is not available in this state.
At least one member switch has not been upgraded to the new version. In this state,
neither manual nor automatic rollback can be performed.
Table
131
"Enabling version compatibility
12.