Cisco 12000 User Manual

Cisco 12000 Series Internet Router: GRP/ GRP−B
to PRP Upgrade Procedure

Document ID: 46903

Introduction
Prerequisites

Requirements
Components Used
Conventions

Upgrade Procedure
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Related Information

Introduction

This document explains the recommended upgrade procedures for the Cisco 12000 Series Internet Router that
returns the router to service in the shortest time frame.

Prerequisites

Requirements

Readers of this document should have knowledge of these topics:

Architecture of the Cisco 12000 Series Internet Router•
Router bootup process (see Understanding the Bootup Process on the Cisco 12000 Series Internet

•

Router)

Components Used

The information in this document is based on these software and hardware versions:

Cisco 12000 Series Internet Router•
All versions of Cisco IOS® software that run on this platform•

The information in this document was created from the devices in a specific lab environment. All of the
devices used in this document started with a cleared (default) configuration. If your network is live, make sure
that you understand the potential impact of any command.

Conventions

For more information on document conventions, refer to the Cisco Technical Tips Conventions.

Upgrade Procedure

This section provides the recommended procedure to introduce a Performance Route Processor (PRP) into a
Cisco 12000 Series Internet Router that contains a Gigabit Route Processor (GRP or GRP−B).

Note: A Cisco 12xxx PRP−2 route processor loaded with rommon version 0.67 (1.7dev) cannot read the first
file on Disk 0, and fails to boot automatically. A PRP−2 route processor requires rommon version 2.83
(1.8dev) or later, in order to boot automatically. Earlier versions of rommon encounter read errors when
loaded on a PRP−2. If you have a Cisco 12xxx PRP−2 route processor loaded with rommon version 0.67
(1.7dev), use the procedure explained in the Field Notice: PRP−2 Does Not Auto−boot Due to ROMMON
Read Errors document in order to upgrade to the appropriate rommon version.

This section lists the steps to migrate the configuration from the GRP to the PRP, which enables the PRP to be
activated with minimum user intervention.

Note: The procedure does not use:

File Transfer Protocol (FTP), Trivial File Transfer Protocol (TFTP), or any other tools to edit the

•

configuration offline.
Any High Availability features, because of which, there will be an extended period of disruption to

•

the network.

Complete these steps:

Open the box that contains the PRP.1.
Remove the Flash disk from the PRP.2.
Remove any device present in the GRP Flash card slot 1.3.
Insert the PRP Flash disk into the GRP Flash card slot1.

4.

Warning: Do not format the disk!

Check the disk contents with the dir disk1: command.5.
If the Cisco IOS image on disk1 does not match your requirement, type the delete disk1:<filename>

6.
command to remove the IOS image from the disk.
Verify whether you have a copy of the required PRP IOS image. The file name must be

7.
c12kprp−<featureset>−<compression>.120−<release id>. Use the copy tftp disk1: command to
copy the image to disk1:.

At the end of the dialog box, this warning is displayed:

%Warning: File not
a valid executable for this system
Abort Copy? [confirm]

Press the spacebar on your keyboard to continue.

router#copy tftp: disk1:
Address or name of remote host []? <ip address or hostname>
Source filename []?c12kprp−p−mz.120−25.S
Destination filename [c12kprp−p−mz.120−25.S]?
Accessing tftp://10.1.1.1/c12kprp−p−mz.120−25.S...

%Warning: File not a valid executable for this system

Abort Copy? [confirm] <press space to continue at this point>

To ensure that the image is copied correctly, verify the MD5 hash for the new image on disk1: In

8.
order to do so, use the verify /md5 disk1:<image name> command. Compare the resultant string
against the MD5 hash value posted at the Cisco Downloads (
Make a note of the image name that will be used on the PRP. In order to see the image name, use the

9.

registered customers only

) site.

dir disk1: command.
Remove any existing boot system commands from the running−configuration with the no boot

10.

system command.
Set the boot system command to boot the new Cisco IOS software image.11.