Cisco Systems OL-14361-01 manual Previewing Rollback Configuration Changes, 110

Chapter 5 Configuring Additional Router Features

Managing Configuration History and Rollback

Previewing Rollback Configuration Changes

The show configuration rollback changes command allows you to preview the configuration changes that take place if you roll back the configuration to a specific commitID. For example, if you want to roll back the configuration to a specific point, all configuration changes made after that point must be undone. This rollback process is often accomplished by executing the “no” version of commands that must be undone.

To display the prospective rollback configuration changes from the current configuration to a specific commitID, go to EXEC or administration EXEC mode and enter the show configuration rollback changes to commitId command. In the following example, the command help displays the available commitIDs, and then the rollback changes are displayed.

RP/0/RP1/CPU0:router# show configuration rollback changes to ?

1000000217 Commit ID

1000000218 Commit ID

1000000219 Commit ID

RP/0/RP1/CPU0:router# show configuration rollback changes to 1000000218

Building configuration...

no interface Loopback100 interface POS0/1/0/0

no ipv6 nd dad attempts

!

!

no route-policy xx end

To display the prospective rollback configuration changes from the current configuration to a specified number of previous sessions, go to EXEC or administration EXEC mode and enter the show configuration rollback changes last commit-rangecommand:

RP/0/RP0/CPU0:router# show configuration rollback changes last 2

Building configuration...

interface Loopback3 no description

no ipv4 address 10.0.1.1 255.0.0.0 exit

interface Loopback4 no description

no ipv4 address 10.0.0.1 255.0.0.0 end

In the preceding example, the command display shows the proposed rollback configuration changes for the last two commit IDs.

Rolling Back the Configuration to a Specific Rollback Point

When you roll back the configuration to a specific rollback point, you undo all configuration changes made during the session identified by the commit ID for that rollback point, and you undo all configuration changes made after that point. The rollback process rolls back the configuration and commits the rolled-back configuration. The rollback process also creates a new rollback point so that you can roll back the configuration to the previous configuration.

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