default コマンド

sw1#sh running-config interface fastEthernet 0/2
Building configuration...

Current configuration : 275 bytes
!
interface FastEthernet0/2
switchport access vlan 666
switchport mode access
switchport port-security
switchport port-security aging time 15
switchport port-security aging type inactivity
macro description Access
dot1x port-control auto
spanning-tree portfast
end

sw1#
Interface FastEthernet0/2 set to default configuration
05:06:26: ％LINEPROTO-5-UPDOWN: Line protocol on Interface
FastEthernet0/2， changed state to down
sw1(config)#default interface fastEthernet 0/2
Interface FastEthernet0/2 set to default configuration
05:06:26: ％LINEPROTO-5-UPDOWN: Line protocol on Interface FastEthernet0/2， changed state to down
sw1(config)#do
05:06:29: ％LINEPROTO-5-UPDOWN: Line protocol on Interface FastEthernet0/2， changed state to upshow run int fast 0/2
Building configuration...

Current configuration : 68 bytes
!
interface FastEthernet0/2
switchport mode dynamic desirable
end

sw1(config)#

便利かも。

sw1(config)#default interface range fastEthernet 0/1 - 24 　
なんてのも出来る。