Cisco Catalyst 4500 Series - Verifying Redundancy Mode before Beginning the ISSU Process

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Catalyst 4500 Series Switch, Cisco IOS Software Configuration Guide - Cisco IOS XE 3.9.0E and IOS 15.2(5)E
Chapter 7 Configuring the Cisco IOS In-Service Software Upgrade Process
Performing 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 1 is the active
supervisor engine, and that slot 2 is the standby supervisor engine. Both supervisor engines are running
the same Cisco IOS software image.
Switch# show redundancy states
my state = 13 -ACTIVE
peer state = 8 -STANDBY HOT
Mode = Duplex
Unit = Primary
Unit ID = 1
Redundancy Mode (Operational) = Stateful Switchover
Redundancy Mode (Configured) = Stateful Switchover
Redundancy State = Stateful Switchover
Maintenance Mode = Disabled
Manual Swact = enabled
Communications = Up
client count = 39
client_notification_TMR = 240000 milliseconds
keep_alive TMR = 9000 milliseconds
keep_alive count = 0
keep_alive threshold = 18
RF debug mask = 0x0
Switch# show redundancy
Redundant System Information :
------------------------------
Available system uptime = 1 minute
Switchovers system experienced = 0
Standby failures = 0
Last switchover reason = none
Hardware Mode = Duplex
Configured Redundancy Mode = Stateful Switchover
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.