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Software Configuration Guide—Release IOS XE 3.6.0SG and IOS 15.2(2)SG
OL-30933-01
Chapter 7 Configuring the Cisco IOS XE In Service Software Upgrade Process
How to Perform the ISSU Process
peer state = 4 -STANDBY COLD
Mode = Duplex
Unit = Primary
Unit ID = 3
Redundancy Mode (Operational) = RPR
Redundancy Mode (Configured) = Stateful Switchover
Redundancy State = RPR
Manual Swact = enabled
Communications = Up
client count = 64
client_notification_TMR = 240000 milliseconds
keep_alive TMR = 9000 milliseconds
keep_alive count = 1
keep_alive threshold = 18
RF debug mask = 0
Switching to the Standby Supervisor Engine
This task describes how to switchover to the standby supervisor engine, which is running the new
Cisco IOS XE software image. Perform the following steps at the active supervisor engine.
This example shows how to cause a switchover to the former standby supervisor engine (slot 6), 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 6 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
Slot = 6
RP State = Active
ISSU State = Run Version
Operating Mode = Stateful Switchover
Current Image = bootflash:new_image
Command or Action Purpose
Step 1
Switch> enable
Enables privileged EXEC mode.
Enter your password if prompted.
Step 2
Switch# issu runversion [standby-slot]
[standby-image-new]]
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.
When you enter the issu runversion command, an SSO
switchover will be performed, and NSF procedures will be
invoked if so configured.
Step 3
Switch# show issu state [detail]
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 6.
Step 4
Switch# show redundancy [states]
Displays redundancy facility state information.
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