How can I delete a fat finger of a mis assigned interface?

[michael.s.mcneice]

Hi I am getting the following message (below), how can I remove int fa 0/0.1 to properly assign int fa 0/0?

Branch1(config-if)#no shutdown
% 10.1.1.0 overlaps with FastEthernet0/0.1
FastEthernet0/0: incorrect IP address assignment

[Philip D'Ath]

Try either:

no interface FastEthernet0/0.1

or

default interface FastEthernet0/0.1

Note you sometimes have to reboot the device (if you are unlucky) after removing an interface.