Cisco Catalyst 4500 Series Software Configuration Manual page 300

In-Service Software Upgrade (ISSU) on a VSS
Perform the following steps at the active supervisor engine:
Command or Action
Step 1
Switch> enable
Step 2
Switch# issu changeversion [active-slot
active-image-new]] [standby-slot
[standby-image-new]] [at hh:mm | in hh:mm]
[quick]
Step 3
Switch# show issu state [detail]
Step 4
Switch# show redundancy [states]
This example shows how to initiate an ISSU upgrade process using the issu changeversion command.
The outputs of the show switch virtual, show issu state detail, show redundancy, and show
redundancy states commands are included to show the supervisor state before and after the upgrade
procedure.
Switch> enable
Switch# show switch virtual
Switch mode
Virtual switch domain number : 16
Local switch number
Local switch operational role: Virtual Switch Active
Peer switch number
Peer switch operational role : Virtual Switch Standby
Switch#
Switch#show redundancy states
Catalyst 4500 Series Switch, Cisco IOS Software Configuration Guide - Cisco IOS XE 3.9.xE and IOS 15.2(5)Ex
5-74
: Virtual Switch
: 1
: 2
my state = 13 -ACTIVE
peer state = 8 -STANDBY HOT
Chapter 5
Purpose
Enables privileged EXEC mode.
Enter your password if prompted.
Initiates a single-step complete upgrade process cycle.
Performs the logic of the four standard commands (issu
loadversion, issu runversion, issu acceptversion, and issu
commitversion) without user intervention.
active-slot—Defines the active slot number (the Virtual slot
number). Use the show switch virtual slot-map command
to determine the virtual slot number from the physical slot
number.
new-image—Specifies IOS XE image URL to be upgraded
to.
standby-slot—Defines the standby slot number (the Virtual
slot number).
standby-image—Specifies the standby IOS XE image URL.
at hh:mm—Schedules an ISSU upgrade to begin in the future.
Provides an exact time (hh:mm, 24 hour format) in the next 24
hours when the upgrade will occur.
in hh:mm—Schedules an ISSU upgrade to begin in the
future. Provides the number of hours and minutes (hh:mm
format) that will elapse before an upgrade will occur (99:59
max).
quick—Upon switchover, boots the standby supervisor
engine with the new, rather than old, image for faster
upgrade.
Displays the state of the during the ISSU process. At this
point in the ISSU process, use this command to check that
the standby supervisor engine is loaded and is in SSO mode.
Displays redundancy facility state information.
Configuring Virtual Switching Systems