Wassim

There is a useful command that every network administrator needs to know on Cisco IOS, which is default interface . This command resets the interface to its default settings, in case you face a networking issue or you don’t understand what’s going on after you made an interface configuration change. To run the Cisco default interface command: Place yourself at the global configuration level, issue the following command: default interface {interfaceID}. Here is an example of running the default interface command on a Catalyst 6500 switch. Beware that, in the case of a Catalyst 6500 switch, setting an interface back to its default configuration makes it a L3 interface back again! See the no switchport under the interface.