Have you ever faced a situation where you have badly misconfigured your router and had to roll back the configuration to a previous known state? Assuming that the working configuration was still saved in the NVRAM, you only had two options - to manually work out the configuration commands to bring the router back to the previous state or to reload the router. In both cases the time was running too fast - both for the users who were facing the network downtime and especially for you. In this month`s IP Corner Ivan Pepelnjak describes how to use the Cisco IOS Configuration Replacement and Configuration Rollback feature to replace the current running configuration with any saved Cisco IOS configuration file.