Configuration Replacement - Part 3
Part 3 of 3
In this video lesson we will take a look at how to replace your running-configuration in Cisco IOS. We will cover different methods and the potential problems with each method. Finally, we will take a look at a the relatively new Cisco IOS configuration replacement feature and see that it (when used properly) is a great tool.
The configure replace command provides the capability to replace the current running configuration with any saved Cisco IOS configuration file. This functionality can be used to revert to a previous configuration state, effectively rolling back any configuration changes that were made since the previous configuration state was saved.
This is an AWESOME command with a ton of practical applications. This is especially nice for lab rats. You can store different configurations in the NVRAM of your devices or on a TFTP server and instantly load those configurations into the running configuration. The ability to quickly load a known-good configuration into the running-config is extremely beneficial.
I ran across this command a while ago, but I thought that it required the configuration of configuration archive in order to work. This seems to be the case only if you intend to use the time option. As always, different IOS versions and platforms may handle this differently, so be aware that this command may function differently on your device.