Cisco Cisco IOS XR Software Release 3.2

This appendix describes how to upgrade or downgrade the ROM Monitor software on a Cisco CRS-1.

Cisco IOS XR

 

software is installed and activated as modular packages, allowing specific features or 

software patches to be installed, upgraded, or downgraded without impacting unrelated processes. In 
addition, a software package can be upgraded or downgraded on all supported card types. Cisco IOS XR 
software packages are installed from package installation envelopes (PIE) files that contain one or more 
software components.

Use the procedures in Upgrading from Cisco IOS to Cisco IOS XR Software on the Cisco 12000 Series 
Router, Release 3.2 to upgrade a Cisco XR 12000 Series Router from Cisco IOS software 12.0(31)Sa to 
Cisco IOS XR Software Release 3.2.2.

For more information on bringing up a router using the Cisco IOS XR software, refer to the
Cisco IOS XR Getting Started Guide.

Before performing an upgrade, perform the following tasks:

Review the 

 before proceeding with the upgrade.

Verify system stability with the commands described in the particular upgrade section that your are 
performing.