Cisco Catalyst 4500 Series Software Configuration Manual page 295

Chapter 5 Configuring Virtual Switching Systems
Perform the following steps at the active supervisor engine:
Command or Action
Step 1
Switch> enable
Step 2
Switch# issu loadversion
active-image-new [standby-slot]
standby-image-new
Step 3
Switch# show issu state [detail]
Step 4
Switch# show redundancy [states]
This example shows how to start the ISSU process, boot the standby supervisor engine in the Standby
Hot state, and load the standby supervisor engine slot (6) with the new IOS XE software image:
Switch> enable
Switch# issu loadversion 1 bootflash:new_image 11 slavebootflash:new_image
%issu loadversion executed successfully, Standby is being reloaded
Switch# show issu state detail
[
active-slot]
RP State = Active
ISSU State = Load Version
Operating Mode = Stateful Switchover
Current Image = bootflash:old_image
Pre-ISSU (Original) Image = bootflash:old_image
Post-ISSU (Targeted) Image = bootflash:new_image
RP State = Standby
ISSU State = Load Version
Operating Mode = Stateful Switchover
Current Image = bootflash:new_image
Pre-ISSU (Original) Image = bootflash:old_image
Post-ISSU (Targeted) Image = bootflash:new_image
Catalyst 4500 Series Switch, Cisco IOS Software Configuration Guide - Cisco IOS XE 3.9.xE and IOS 15.2(5)Ex
Purpose
Enables privileged EXEC mode.
Enter your password if prompted.
Starts the ISSU process and (optionally) overrides the
automatic rollback when the new Cisco IOS XE software
version is detected to be incompatible.
It may take several minutes after entering the issu
loadversion command for Cisco IOS XE software to load
onto the standby supervisor engine and for the standby
supervisor engine to transition to SSO mode. This causes
the standby supervisor engine to reload with the new
software image.
If used, the active-slot and standby-slot numbers should be
specified as Virtual Slot numbers. Use the show switch
virtual slot-map command to determine the
correspondence between Virtual slot numbers and their
physical locations.
Displays the state of ISSU during the ISSU process. At this
point in the ISSU process, use this command to check that
the standby supervisor engine is loaded and is in SSO mode.
It may take several minutes after entering the
issu loadversion command for Cisco IOS XE software to
load onto the standby supervisor engine and the standby
supervisor engine to transition to SSO mode. If you enter
the show issu state command too quickly, you may not see
the information you need.
Displays redundancy facility state information.
Slot = 1
Slot = 11
In-Service Software Upgrade (ISSU) on a VSS
5-69