Command
Default Interface
Use
This command allows you to quickly revert an interface back to its default configuration.
If you have a lot of changes, this is much faster than using the no version of every command on the interface.
Syntax
Router(config)#default interface <interface>
Example
In this example we will revert R1’s Fa0/0 interface back to its default configuration.
First lets have a look at Fa0/0’s current config.
R1(config)#do show run int fa0/0 Building configuration… Current configuration : 210 bytes ! interface FastEthernet0/0 description “This is a description” bandwidth 100000 ip address 10.1.1.1 255.255.255.0 ip nat inside ip virtual-reassembly ip ospf cost 1 delay 4 speed 100 full-duplex end R1(config)#
Now lets default the interface.
R1(config)#default interface fa0/0 Building configuration… Interface FastEthernet0/0 set to default configuration R1(config)# *Mar 1 00:42:00.851: %DUAL-5-NBRCHANGE: IP-EIGRP(0) 100: Neighbor 10.1.1.2 (FastEthernet0/0) is down: interface down R1(config)# R1(config)#do show run int fa0/0 Building configuration… Current configuration : 73 bytes ! interface FastEthernet0/0 no ip address duplex auto speed auto end R1(config)#