Current configuration : 1700 bytes ! version 12.2 no service timestamps log datetime msec no service timestamps debug datetime msec no service password-encryption ! hostname S1 ! ! ! ! ! ! spanning-tree mode pvst spanning-tree extend system-id ! interface FastEthernet0/1 spanning-tree portfast ! interface FastEthernet0/2 spanning-tree portfast ! interface FastEthernet0/3 spanning-tree portfast ! interface FastEthernet0/4 spanning-tree portfast ! interface FastEthernet0/5 spanning-tree portfast ! interface FastEthernet0/6 spanning-tree portfast ! interface FastEthernet0/7 spanning-tree portfast ! interface FastEthernet0/8 spanning-tree portfast ! interface FastEthernet0/9 spanning-tree portfast ! interface FastEthernet0/10 spanning-tree portfast ! interface FastEthernet0/11 spanning-tree portfast ! interface FastEthernet0/12 spanning-tree portfast ! interface FastEthernet0/13 spanning-tree portfast ! interface FastEthernet0/14 spanning-tree portfast ! interface FastEthernet0/15 spanning-tree portfast ! interface FastEthernet0/16 spanning-tree portfast ! interface FastEthernet0/17 spanning-tree portfast ! interface FastEthernet0/18 spanning-tree portfast ! interface FastEthernet0/19 spanning-tree portfast ! interface FastEthernet0/20 spanning-tree portfast ! interface FastEthernet0/21 spanning-tree portfast ! interface FastEthernet0/22 spanning-tree portfast ! interface FastEthernet0/23 spanning-tree portfast ! interface FastEthernet0/24 spanning-tree portfast ! interface GigabitEthernet0/1 spanning-tree portfast ! interface GigabitEthernet0/2 spanning-tree portfast ! interface Vlan1 no ip address shutdown ! ! ! ! line con 0 ! line vty 0 4 login line vty 5 15 login ! ! ! ! end