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Software Configuration Guide—Release IOS XE 3.3.0SG and IOS 15.1(1)SG
OL-25340-01
Chapter 6 Configuring the Cisco IOS XE In Service Software Upgrade Process
How to Perform the ISSU Process
You can verify the ISSU software upgrade by entering show commands to provide information on the
state of the during the ISSU process:
This example shows how to display the state and the current status of the supervisor engine during the
ISSU process:
Switch> enable
Switch# show issu state
Switch# show redundancy
Verifying Redundancy Mode Before Beginning the ISSU Process
Before you begin the ISSU process, verify the redundancy mode for the system and be sure to configure
NSF and SSO.
The following example displays verification that the system is in SSO mode, that slot 3 is the active
supervisor engine, and that slot 4 is the standby supervisor engine. Both supervisor engines are running
the same Cisco IOS XE software release.
Switch# show redundancy states
my state = 13 -ACTIVE
peer state = 8 -STANDBY HOT
Mode = Duplex
Unit = Primary
Unit ID = 5
Redundancy Mode (Operational) = Stateful Switchover
Redundancy Mode (Configured) = Stateful Switchover
Redundancy State = Stateful Switchover
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
Switch# show redundancy
Redundant System Information :
------------------------------
Available system uptime = 12 minutes
Switchovers system experienced = 0
Standby failures = 0
Last switchover reason = none
Command or Action Purpose
Step 1
Switch> enable
Enables privileged EXEC mode.
Enter your password if prompted.
Step 2
Switch# show issu state [detail]
Displays the state of the during the ISSU process.
Step 3
Switch# show redundancy
Displays current or historical status, mode, and related
redundancy information about the device.
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