Datasheet

OL-17436-01

Upgrading to the PRP

Step 5 Use the copy tftp: disk1: command to copy onto the Flash disk a PRP image that is the same as that

currently running on the GRPs (in this example, 12.0(26)S). PRP images are titled c12kprp-<feature

set>-<compression>.120-<release id>. You will receive an error that the PRP image is not executable on

the GRP. When prompted to abort the copy, type n.

Use the copy tftp: stby-disk1: command if the Flash disk is in the standby RP.

Router# copy tftp: disk1:

Address or name of remote host [172.16.16.254]?

Source filename [c12kprp-boot-mz.120-26.S]? c12kprp-p-mz.120-26.S

Destination filename [c12kprp-p-mz.120-26.S]?

Accessing tftp://172.16.16.254/c12kprp-p-mz.120-26.S...

%Warning: File not a valid executable for this system

Abort Copy? [confirm] n

Step 6 To verify that the image has been copied correctly, verify the MD5 hash for the new image on disk1:. To

do this, use the command verify /md5 disk1image-name. The resulting string should be compared

against the MD5 hash value posted on the Software download page on Cisco.com.

Step 7 Place the Flash disk referred to in Step 5 back into the PRP Flash disk drive.

Step 8 Repeat Step 2 through Step 7 for the second PRP to be installed as standby.

Step 9 Remove any existing boot system commands from the running configuration by using the command no

boot system. This will make the PRP boot from the image on the Flash disk.

Step 10 Remove the standby GRP from the router.

Step 11 Insert the PRP into the router in place of the standby GRP. The PRP will now begin to load the Cisco IOS

image contained on the Flash disk. At this stage, even though a GRP and a PRP are in the chassis

simultaneously, the router remains in SSO or RPR+ mode because the RPs are running the same image.

Note The PRP and GRP must both be running the same Cisco IOS version; otherwise, the redundancy

will revert to RPR mode and there may be traffic disruption.

Step 12 Remove the active GRP. Because the router is configured for High Availability (SSO or RPR+ mode),

the switchover to the PRP will take advantage of the High Availability feature and there will be minimum

disruption in operation.

Step 13 Insert the standby PRP into the chassis, also with the same Cisco IOS image loaded onto its Flash disk.

Now both PRPs will be up and running the same image that was originally running on the GRPs. At this

point you can upgrade the Cisco IOS version on the PRPs to the version shipped with the cards.

Note You must have the same Cisco IOS image loaded on the Flash disks of the two PRPs. If different

versions are loaded, the redundancy will revert to RPR and there may be traffic disruption.

Note If a GRP and PRP are running simultaneously in the router chassis and the PRP is active and the GRP

standby, the router will revert to RPR redundancy mode. This is because the upgrade from GRP to PRP

is supported with High Availability, but not the downgrade from PRP to GRP.

After you enter the configuration to load the new Cisco IOS software image, you must upgrade the RP

ROM monitor. Follow the appropriate procedure, depending on which version of Cisco IOS software is

currently running on the RP.