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Upgrading to CiscoIOS Release 12.2(28)SB on a Cisco 10000 Series Router
OL-8833-01
Upgrade Option 2: ESR-PRE2 Upgrade with Cold Start
Upgrade Option 2: ESR-PRE2 Upgrade with Cold Start
This procedure assumes the following configuration:
•Cisco 10000 series chassis with two installed ESR-PRE2 processors
•A non-upgrade-enabled image such as 12.2(16)BX or earlier 12.3(7)XI1 or earlier on the PRE2s
Note The router will not be available for user traffic during Step7 of the software upgrade, and traffic cannot
resume until the upgrade is complete.
To perform the upgrade, follow these steps:
Step1 Load the appropriate 12.2(28)SB image from the TFTP server into bootflash on both ESR-PRE2s.
Step2 If the startup configuration is not up to date, save the running configuration using the write-memory
command.
Step3 Copy the startup configuration from the active ESR-PRE2 to a disk or TFTP server to save it for possible
rollback.
Step4 At the console, use the boot system bootflash:image_name command to edit your boot system variable
to point to the 12.2(28)SB image in bootflash. Save the running configuration using the write memory
command.
Use the show bootvar command to verify that the boot system variable has been altered appropriately
on both the active and standby ESR-PRE2s.
If you do not want to make further changes to the startup configuration for the new command set offered
by release 12.2(28)SB, skip to Step7.
Note In some older releases, the configuration does not explicitly specify the redundancy mode. If your
current configuration is one of these, and you want RPR+ operation with release 12.2(28)SB, you must
add the line mode rpr-plus after the line that specifies redundancy in the configuration on the TFTP
server. Release 12.2(28)SB defaults to SSO mode unless it is explicitly configured for RPR+.
Step5 Your startup configuration now reflects the altered boot system image. Copy it to the TFTP server and
make any other needed edits. Then copy the altered configuration from the 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. Verify that the startup configuration has been copied to both the
active and the standby NVRAM using the dir command and comparing file size.
Step6 Verify again that the boot image and config-register are set appropriately using the show bootvar
command.
Step7 On the active ESR-PRE2, enter the reload command and type no if you are asked to save the running
configuration.
•If the system is configured for autoboot, it will autoboot the new 12.2(28)SB image on both
ESR-PRE2s.
•If the system is not configured for autoboot, both ESR-PRE2s will come up in ROM monitor after
reloading. Boot the 12.2(28)SB image in bootflash from the ROM monitor prompt on each
ESR-PRE2.