![H3C S5500-HI Switch Series Fundamentals Configuration Manual Download Page 146](http://html1.mh-extra.com/html/h3c/s5500-hi-switch-series/s5500-hi-switch-series_fundamentals-configuration-manual_3750974146.webp)
135
CAUTION:
To upgrade system software of the IRF fabric through ISSU when the new and current system software
image versions are incompatible, make sure that the multi-active detection (MAD) function has been
configured for the IRF fabric. Otherwise, duplicate IRF fabrics will coexist after the new master (the slave
switch specified with the
issu load
command) is rebooted, causing network faults.
Table 14
Configure incompatible ISSU:
To do…
Use the command…
Remarks
Enters system view
system-view
—
Upgrade the specified
slave switch (the new
master after the
upgrade)
issu load file
upgrading-filename
slot
slot-number
force
Required
slot-number
is the member ID of the slave switch.
After this command is executed, the specified slave
switch (the new master after the upgrade) reboots
with the new system software image, and stays in
the Recover state after reboot.
Perform the next operation after the reboot process
completes.
Upgrade all the IRF
member switches that
have not been upgraded
in one operation
issu run switchover slot
slot-number
Required
The
slot-number
argument provided in this
command must be the same as that specified in the
issu load
command.
When this command is executed, all the IRF
member switches except the specified slave switch
(the new master) are upgraded to the new version,
and the ISSU process completes after reboot.
Configure the ISSU version rollback timer
Follow these steps to configure the rollback timer:
To do…
Use the command…
Remarks
Enters system view
system-view
—
Configure the rollback
timer
issu rollback-timer
minutes
Optional
By default, the rollback timer is 45 minutes. If you
do not execute the
issu accept
or
issu commit
command on the specified IRF member switch
before the specified rollback timer expires, the
system automatically stops the ISSU process and
reverts to the previous software version.
Follow these steps to perform a manual version rollback:
To do…
Use the command…
Remarks
Enters system view
system-view
—