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Software Configuration Guide—Release 15.0(2)SG
OL-23818-01
Chapter 8 Configuring Supervisor Engine Redundancy Using RPR and SSO
Performing a Software Upgrade
The following scenario is not supported: An active supervisor engine running
Cisco IOS Release 12.1(x)E, and a standby supervisor engine running Cisclo IOS Release 12.2(x)S. The
standby supervisor engine resets repeatedly.
If you are trying to upgrade redudant 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:
This example shows how to perform a software upgrade:
Switch# config terminal
Switch(config)# config-register 0x2
Switch(config)# boot system flash slot0:cat4000-i5s-mz.122-20.EWA
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.
Step 8
Switch# copy running-config start-config
Saves the configuration.
Step 9
Switch# redundancy reload peer
Reloads the redundant supervisor engine and brings it
back online (using the new release of the Cisco IOS
software).
Note Before proceeding to Step 10, ensure that the
switch is operating in RPR mode.
Step 10
Switch# redundancy force-switchover
Conducts a manual switchover to the redundant
supervisor engine. The redundant supervisor engine
becomes the new active supervisor engine using the new
Cisco IOS software image.
The old active supervisor engine reboots with the new
image and becomes the redundant supervisor engine.