Cisco CRS-1 - Carrier Routing System Router Migration Guide

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Cisco CRS-1 Carrier Routing System to Cisco CRS-3 Carrier Routing System Migration Guide
OL-13669-03
Chapter 1 Migrating to a Cisco CRS-3 Carrier Routing System
Upgrading to Cisco IOS XR Software Release 4.0.X(PX) Before Migrating to Cisco CRS-3 Hardware
OSPF
router(config-ospf)#no max-metric router-lsa
ISIS
router(config-isis)#no set-overload-bit
Disk Cleanup (Optional)
Once the software upgrade or downgrade has been completed, you can recover some disk space by
removing any inactive packages that are no longer needed (if the packages are required at a later time,
they can be re-added):
Step 1 Obtain the list of inactive packages and note the names of packages that are not needed:
router(admin)# show install inactive brief
Step 2 Remove the unnecessary inactive packages:
router(admin)# install remove disk0:<package_name1> disk0:<package_name2> ..
disk0:<pkg_nameN> sync
or
router(admin)# install remove inactive(to remove all inactive packages)
Using the sync option prevents other users from executing any other command during the install
operation.
Step 3 Verify/fix the configuration file system (mandatory)
router(admin)#cfs check
Step 4 If the max-metric or set overload bit was set during any of the pre-upgrade tasks restore the metric
using the following commands:
OSPF
router(config-ospf)#no max-metric router-lsa
ISIS
router(config-isis)#no set-overload-bit
Upgrade Firmware (Mandatory)
Both the ROMMON and the FPGA firmware need to be upgraded after the <version> image installation
on the system. For detailed upgrade procedure please refer to the IOS XR Firmware Upgrade Guide
document which can be accessed at:
http://www.cisco.com/web/Cisco_IOS_XR_Software/index.html

Cisco CRS-1 - Carrier Routing System Router Specifications

General

Brand	Cisco
Model	CRS-1 - Carrier Routing System Router
Category	Network Router
Language	English