5-4
ATM Switch Router Software Configuration Guide
OL-7396-01
Chapter 5
Configuring Redundancy
Route Processor Redundant Operation (Catalyst 8540 MSR)
To force the secondary route processor to take over as the primary, use the following privileged EXEC
command:
Example
The following example shows how to make the secondary route processor the primary.
Switch#
redundancy force-failover main-cpu
The following example shows the warning message that appears if you attempt to force a failover
between route processors whose Cisco IOS images are significantly different.
Switch#
redundancy force-failover main-cpu
Warning: Attempting to migrate to a different version of system image than the primary.
Do you want to continue?
Y
Note
If the translation functions needed to migrate the databases during the route processor switchover are
significant, the warning message in the previous example appears asking you to confirm the upgrade or
downgrade.
As long as you have not changed the default configuration register setting, which is set to autoboot
by default, the secondary route processor (formerly the primary) completes the boot process from
standby mode.
If you have changed the default configuration register value, you can change it back to autoboot, and
ensure that the correct system image is used at startup, by performing the following steps, beginning in
global configuration mode:
Note
If the secondary route processor remains in ROM monitor mode, you can manually boot the processor
from either the bootflash or Flash PC card.
Command
Purpose
redundancy force-failover main-cpu
Forces a route processor switchover.
Command
Purpose
Step 1
Switch(config)#
config-register 0x2102
Sets the config register for autoboot.
Step 2
Switch(config)#
boot system
{[
device
:
]
filename
[
hostname
|
ip-address
] |
flash
[
device
:
][
filename
]
|
mop
filename
[
type
] [
card
/
subcard
/
port
] |
rcp
filename
[
ip-address
] |
rom
|
tftp
filename
[
hostname
|
ip-address
]}
Specifies the system image file to load at startup.
Step 3
Switch(config)#
end
Switch#
Returns to privileged EXEC mode.
Step 4
Switch#
copy system:running-config
nvram:startup-config
Saves the configuration to NVRAM.