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Software Configuration Guide—Release 12.2(20)EW
78-16453-01 A1
Chapter 6 Configuring Supervisor Engine Redundancy on the Catalyst 4507R and 4510R Switches
Performing a Software Upgrade
This example shows how to disable default automatic synchronization and allow only automatic
synchronization of the config-registers of the active supervisor engine to the standby supervisor engine,
while disallowing synchronization of the startup configuration:
Switch(config)# redundancy
Switch(config-red)# main-cpu
Switch(config-r-mc)# no auto-sync standard
Switch(config-r-mc)# auto-sync config-register
Switch(config-r-mc)# end
Performing a Software Upgrade
The software upgrade procedure supported by supervisor engine redundancy allows you to upgrade the
Cisco IOS software image on the supervisor engines without reloading the system.
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
Or:
Switch# copy source_device:source_filename
slaveslot0:target_filename
Or:
Switch# copy source_device:source_filename
slavebootflash:target_filename
Copies the new Cisco IOS software image to bootflash on
both supervisor engines.
Step 2
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.
Step 3
Switch# copy running-config start-config
Saves the configuration.
