Using Changeversion To Automate An Issu Upgrade - Cisco Catalyst 4500 Series Configuration Manual

Performing the ISSU Process
(cat4500-ENTSERVICES-M), Version 12.2(31)SGA, RELEASE SOFTWARE (fc1)
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Compiled Tue 05-Sep-06 16:16 by sanjdas
Switch# show issu state detail
The ISSU process has been completed. At this stage, any further Cisco IOS software version upgrade or
downgrade requires that a new ISSU process be invoked.

Using changeversion to Automate an ISSU Upgrade

This task describes how to use the issu changeversion command to perform a one step ISSU upgrade.
Prerequisites
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Software Configuration Guide—Release IOS XE 3.3.0SG and IOS 15.1(1)SG
5-26
Image Version = Cisco IOS Software, Catalyst 4500 L3 Switch Software
BOOT = bootflash:new_image,12;bootflash:old_image,1;
Configuration register = 0x822
Slot = 2
RP State = Active
ISSU State = Init
Boot Variable = bootflash:new_image,12;bootflash:old_image,1;
Operating Mode = Stateful Switchover
Primary Version = N/A
Secondary Version = N/A
Current Version = bootflash:new_image
Slot = 1
RP State = Standby
ISSU State = Init
Boot Variable = bootflash:new_image,12;bootflash:old_image,1;
Operating Mode = Stateful Switchover
Primary Version = N/A
Secondary Version = N/A
Current Version = bootflash:new_image
Ensure that the new version of Cisco IOS software image is already present in the file system of both
the active and standby supervisor engines. Also ensure that appropriate boot parameters (BOOT
string and config-register) are set for the active and standby supervisor engines
Optionally, perform additional tests and commands to determine the current state of peers and
interfaces for later comparison.
Ensure the system (both active and standby supervisor engines) is in SSO redundancy mode. If the
system is in RPR mode, you can still upgrade the system using the ISSU CLI commands, but the
system will experience extended packet loss during the upgrade.'
Refer to the Stateful Switchover document for more details on how to configure SSO mode on
supervisor engines (refer to
and SSO on Supervisor Engine 6-E and Supervisor Engine
For ISSU to function, the IOS XE software image file names on the active and standby supervisor
engines must match.
Chapter 5 Configuring the Cisco IOS In-Service Software Upgrade Process
Chapter 9, "Configuring Supervisor Engine Redundancy Using RPR
6L-E").
OL-25340-01