Cisco Catalyst 4500 Series - Using Changeversion to Automate an ISSU Upgrade

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Software Configuration Guide—Release IOS XE 3.6.0E and IOS 15.2(2)SG
OL-30933-01
Chapter 5 Configuring Virtual Switching Systems
In-Service Software Upgrade (ISSU) on a VSS
Switch> enable
Switch# issu commitversion 1 slavebootflash:new_image
%issu commitversion executed successfully
As in prior states, the show redundancy, show redundancy states, show issu state [detailed], and
show switch virtual commands can be used to verify that the VSS has reached the desired state.
At the end of the commitversion state, the ISSU process has completed. At this stage, any further Cisco
IOS XE software version upgrade or downgrade will require that a new ISSU process be invoked anew.
Using changeversion to Automate an ISSU Upgrade
This task describes how to use the issu changeversion command to perform a one step ISSU upgrade.
Please ensure that you have read Prerequisites to Performing ISSU, page 5-57, and implemented the
appropriate steps.
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 changeversion [active-slot
active-image-new]] [standby-slot
[standby-image-new]] [at hh:mm | in hh:mm]
[quick]
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.
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
the standby supervisor engine is loaded and is in SSO mode.
Step 4
Switch# show redundancy [states]
Displays redundancy facility state information.