9
Upgrading to Cisco IOS Release 12.2(28)SB on a Cisco 10000 Series Router
OL-8833-01
Obtaining Documentation
Step 7
On the active ESR-PRE2 in privileged EXEC mode, enter the
hw-module sec-cpu reset
command to
reboot the standby ESR-PRE2. This will load the 12.2(28)SB image from bootflash, and the standby
PRE2 will come up in RPR mode.
Note
The standby ESR-PRE2 is now in cold standby RPR state. It has not yet processed its configuration. You
can verify its redundancy mode using the
show redundancy
command on the active ESR-PRE2.
Step 8
From the active ESR-PRE2, enter the
redundancy force-switchover main-cpu
command in privileged
EXEC mode. The standby ESR-PRE2 will become the new active ESR-PRE2 (running 12.2S), and the
former active ESR-PRE2 will become the standby ESR-PRE2. Check that the system is carrying traffic.
Verify the autoboot string and IOS version using the
show bootvar
and
show version
commands.
Note
Now you should test the 12.2(28)SB image to determine whether or not a rollback to the previous version
is needed.
Step 9
When you know that rollback is not needed, enter the
write memory
command from the active console
to bring the startup configuration up to date on the active and standby ESR-PRE2s.
If you need to roll back, follow the procedure in the next section.
Rollback Procedure for Option 4
If the newly active ESR-PRE2 does not operate satisfactorily after
Step 8
, you can initiate a rollback
switchover to revert to the original 12.3 operating system.
To initiated a rollback switchover, follow these steps:
Step 1
Copy the original startup configuration from the TFTP server to the startup configuration on the active
and standby ESR-PRE2s using the
copy tftp startup
and
copy tftp stby-nvram:startup-config
commands.
Step 2
Use the
show bootvar
command to verify that this action has modified the boot variable to point to the
old release image.
Step 3
Enter the
hw-module standby-cpu reset
command from the active console. This command resets the
standby ESR-PRE2, which will autoboot to the old release image and come up as the standby ESR-PRE2
in RPR mode.
Step 4
Enter the
redundancy force-switchover main-cpu
command from the active console. This is a
service-affecting step. The standby ESR-PRE2 will come up as the active ESR-PRE2 running the old
release. The standby ESR-PRE2 will autoboot to the old release, running in RPR+ mode.
You have now reverted to the original system configuration.
Obtaining Documentation
Cisco documentation and additional literature are available on Cisco.com. Cisco also provides several
ways to obtain technical assistance and other technical resources. These sections explain how to obtain
technical information from Cisco Systems.
