Cisco Catalyst 4500 Series Configuration Manual page 439

Chapter 2
Command
issu runversion
show issu state
Catalyst 4500 Series Switch Cisco IOS Command Reference—Release XE 3.9.xE and 15.2(5)Ex
Description
Forces a change from the active supervisor engine to the
standby supervisor engine and causes the newly active
supervisor engine to run the new image specified.
Displays the ISSU state and current booted image name
during the ISSU process.
issu abortversion
2-399