Cisco Catalyst 4500 Series - Performing a Software Upgrade

11-13
Catalyst 4500 Series Switch, Cisco IOS Software Configuration Guide - Cisco IOS XE 3.9.xE and IOS 15.2(5)Ex
Chapter 11 Configuring Supervisor Engine Redundancy Using RPR and SSO on Supervisor Engine 6-E and Supervisor
Performing a Software Upgrade
After an initial switchover, there might be occasions when you want to make the supervisor engine in
slot 1 of the chassis the active supervisor engine. If the image on supervisor engine 1 is the one you
intend to run on both supervisor engines, it is not necessary to reboot the image on the supervisor engine
in slot 1 to make it redundant. Instead, you can force another switchover. However, if you want a newer
version of the image to run on both supervisor engines, follow the steps under “Performing a Software
Upgrade” on page 13. Use the show module command to see which slot contains the active supervisor
engine, and force another switchover if necessary.
Performing a Software Upgrade
The software upgrade procedure supported by supervisor engine redundancy allows you to reload the
Cisco IOS software image on the redundant supervisor engine, and once complete, reload the active
supervisor engine once.
The software upgrade procedure supported by supervisor engine redundancy allows you to reload the
Cisco IOS software image on the redundant supervisor engine, and once complete, reloads the active
supervisor engine once.
The following scenario is not supported: An active supervisor engine running
Cisco IOS Release 12.1(x)E, and a standby supervisor engine running Cisco IOS Release 12.2(x)S. The
standby supervisor engine resets repeatedly.
If you are trying to upgrade redundant supervisor engines from Cisco IOS Release 12.1(x)E to 12.2(x)S,
this requires a full system reboot.
To perform a software upgrade, perform this task:
Command Purpose
Step 1
Switch# copy source_device:source_filename
slot0:target_filename
Or:
Switch# copy source_device:source_filename
bootflash:target_filename
Copies the new Cisco IOS software image to bootflash on
the supervisor engine.
Step 2
Switch# copy source_device:source_filename
slaveslot0:target_filename
Or:
Switch# copy source_device:source_filename
slavebootflash:target_filename
Copies the new image to a slave device (such as
slavebootflash and slaveslot0).
Step 3
Switch# config terminal
Switch(config)# config-register 0x2
Switch(config)# boot system flash
device:file_name
Configures the supervisor engines to boot the new image.
If your system was configured to autoboot an earlier
image, enter the following command string to boot the
new image instead:
no boot system flash device:old_file_name
Step 4
Switch(config)# redundancy
Enters redundancy configuration mode.
Step 5
Switch(config-red)# main-cpu
Enters main-cpu configuration submode.
Step 6
Switch(config-r-mc)# auto-syn standard
Synchronizes the configuration elements.
Step 7
Switch(config-r-mc)# end
Returns to privileged EXEC mode.