This is a cool command to erase just the configuration for a particular interface in a Cisco Switch or a Cisco Router.
In the following example we will configure the interface fast Ethernet 0/9 to default configuration
Current Configuration for fast Ethernet 0/9
ITKE-Cisco#sho running-config interface fastEthernet 0/9
Building configuration…
Current configuration : 85 bytes
!
interface FastEthernet0/9
switchport access vlan 100
switchport mode access
end
ITKE-Cisco
Now we will configure the fast Ethernet 0/9 to default configuration using the following command
“default interface fastEthernet 0/9”
ITKE-Cisco#configure t
Enter configuration commands, one per line. End with CNTL/Z.
ITKE-Cisco(config)#default interface fastEthernet 0/9
Interface FastEthernet0/6 set to default configuration
ITKE-Cisco(config)#
Running configuration for fast Ethernet 0/9 after configuring to default settings
ITKE-Cisco#sho running-config interface fastEthernet 0/9
Building configuration…
Current configuration : 68 bytes
!
interface FastEthernet0/9
switchport mode dynamic desirable
end
ITKE-Cisco#
