Cisco Catalyst 4500 series Administration Manual page 285

Chapter 5 Configuring Virtual Switching Systems
Command or Action
Step 1
Switch> enable
Step 2
Switch# issu runversion [standby-slot]
[standby-image-new]]
Step 3
Switch# show issu state [detail]
Step 4
Switch# show redundancy [states]
This example shows how to cause a switchover to the former standby supervisor engine (slot 11), reset
the former active supervisor engine and reload it with the old IOS XE software image so it becomes the
standby supervisor engine:
Switch> enable
Switch# issu runversion 11 slavebootflash:new_image
%issu runversion initiated successfully
A switchover happens at this point. At the new active supervisor engine, do the following after old active
supervisor engine comes up as standby.
Switch# show issu state detail
The new active supervisor engine is now running the new version of software, and the standby supervisor
Note
engine is running the old version of software and is in the standby hot state.
Switch# show redundancy states
OL-30933-01
RP State = Active
ISSU State = Run Version
Operating Mode = Stateful Switchover
Current Image = bootflash:new_image
Pre-ISSU (Original) Image = bootflash:old_image
Post-ISSU (Targeted) Image = bootflash:new_image
RP State = Standby
ISSU State = Run Version
Operating Mode = Stateful Switchover
Current Image = bootflash:old_image
Pre-ISSU (Original) Image = bootflash:old_image
Post-ISSU (Targeted) Image = bootflash:new_image
my state = 13 -ACTIVE
peer state = 8 -STANDBY HOT
Mode = Duplex
Unit = Primary
Software Configuration Guide—Release IOS XE 3.6.0E and IOS 15.2(2)SG
Purpose
Enables privileged EXEC mode.
Enter your password if prompted.
Forces a switchover from the active to the standby
supervisor engine and reloads the former active (current
standby) supervisor engines with the old IOS XE image.
As with any SSO switchover, you are prompted to save the
running configuration if you have changed it. Respond as
appropriate.
When you enter the issu runversion command, an SSO
switchover will be performed, and NSF procedures will be
invoked if so configured.
Displays the state of the during the ISSU process. At this
point in the ISSU process, use this command to check that
a switchover occurs to slot 11.
Displays redundancy facility state information.
Slot = 11
Slot = 1
In-Service Software Upgrade (ISSU) on a VSS
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