Cisco Catalyst 4500 Series, Software Configuration Manual

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Catalyst 4500 Series Switch, Cisco IOS Software Configuration Guide - Cisco IOS XE 3.9.xE and IOS 15.2(5)Ex
Chapter 5 Configuring Virtual Switching Systems
In-Service Software Upgrade (ISSU) on a VSS
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
Manual Swact = enabled
Communications = Up
client count = 474
client_notification_TMR = 240000 milliseconds
keep_alive TMR = 9000 milliseconds
keep_alive count = 1
keep_alive threshold = 18
RF debug mask = 0
ISSU using the Four-command Sequence: Step 2 (runversion)
This task describes the second step of the ISSU four-command sequence, runversion, wherein a
switchover occurs and the standby supervisor engine, which is now loaded with the post-upgrade image,
takes over as the new Active.
At the end of the loadversion step, the following message is logged:
*Aug 14 13:07:08.240: %INSTALLER-7-ISSU_OP_SUCC: Peer state is [STANDBY SSO]; Please issue
the runversion command
Now, you are ready to proceed to the next step.
Perform the following steps at the active supervisor engine.
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.
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.
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 11.
Step 4
Switch# show redundancy [ states ]
Displays redundancy facility state information.