Post-Upgrade Procedure - Cisco CRS-1 - Carrier Routing System Router Migration Manual

Upgrading to Cisco IOS XR Software Release 4.0.X(PX) Before Migrating to Cisco CRS-3 Hardware
The router will reload at the end of activation to start using the new packages.
Note
From Cisco IOS XR software release 3.8 onwards, the install command install activate *3.9.* pause
sw-change sync can be used to enable the user to cost the router out of the IGP path just before the router
reloads, rather than at the point where the activation commences.
Step 4 Verify system stability through executing the commands described under the Check System Stability
section. This release does not support downgrades from PX to P images.
Step 5 Verify activation is successful. Once activation is done and before the install commit operation,
deactivate and remove the upgrade-px.PIE.
Step 6 After removing the upgrade-px.PIE execute the install commit command to commit the newly activated
software
Step 7 Check to see if there were any failed startup configurations. If there were any startup configurations that
failed (were not applied), then refer to the Caveats section to see how it should be handled.
In same very rare cases inconsistencies in the content of the internal configuration files can occur. In
order to avoid such situations, the following steps are recommended before activating packages:
Clear the NVGEN cache:
Step 8
Create a dummy config commit:
Step 9
Force commit update by using the reload command. Press n when the confirmation prompt appears:
Step 10
In same cases the following error may be reported:
In such a case please re-try the command after some time.

Post-Upgrade Procedure

Step 1 Restore the IGP metric if it had been changed before the upgrade
Cisco CRS-1 Carrier Routing System to Cisco CRS-3 Carrier Routing System Migration Guide
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Under idle conditions, this operation may take at least 20 minutes to complete.
router(admin)# install commit
router# show config failed startup
router# run nvgen -F 1
router# config
router(config)#hostname <hostname>
router(config)#commit
router(config)#end
router# reload
Updating Commit Database.
Proceed with reload? [confirm] <- Press "n"
router#reload
Preparing system for backup. This may take a few minutes ............System
configuration backup in progress [Retry later]
Chapter 1
Please wait...[OK]
Migrating to a Cisco CRS-3 Carrier Routing System
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