Manual

Cisco IOS In Service Software Upgrade Process
show issu state
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Cisco IOS Release 12.2(28)SB
Command Description
issu abortversion Cancels the ISSU upgrade or downgrade process in progress and restores the
router to its state before the process had started.
issu acceptversion Halts the rollback timer and ensures the new Cisco IOS software image is not
automatically aborted during the ISSU process.
issu commitversion Allows the new Cisco IOS software image to be loaded into the standby RP.
issu loadversion Starts the ISSU process.
issu runversion Forces a switchover of the active to the standby processor and causes the
newly active processor to run the new image.