Here is an unknown command for many of us, but it can accelerate, and it does, the configuration process with a Catalyst Switch running IOS.

It’s the default interface command. It will reset to defaults the interface selected. It can be used together with the interface range command.

Let’s see an example:

switch# sh run int f0/17

interface FastEthernet 0/17
 switchport access vlan 90
 switchport mode access
 spanning-tree portfast
end

switch# conf t

switch(config)# default interface f0/17
Interface FastEthernet 0/17 set to default configuration

switch(config)# do sh run int f0/17
interface FastEthernet 0/17
end