In my IP Corner article Replacing Configuration on a Working Router, I'm describing how you can use the Configuration Replace and Configuration Rollback features of Cisco IOS to replace configuration you've managed to break with a working one. In the section Event-Driven Rollback, you'll also find Embedded Event Manager applets that emulate the Configuration Commit feature of IOS XR in IOS release 12.4.
Ivan Pepelnjak, CCIE#1354, is the chief technology advisor for NIL Data Communications. He has been designing and implementing large-scale data communications networks as well as teaching and writing books about advanced technologies since 1990. See his full profile, contact him or follow @ioshints on Twitter.
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