S1-Central Cisco switch configuration. ! service timestamps debug uptime service timestamps log uptime no service password-encryption ! hostname S1-Central ! enable secret cisco ! username instructor privilege 15 password cisco username ccna1 privilege 7 password cisco username ccna2 privilege 7 password cisco username ccna3 privilege 7 password cisco username ccna4 privilege 7 password cisco username ccna5 privilege 7 password cisco username ccna6 privilege 7 password cisco username ccna7 privilege 7 password cisco username ccna8 privilege 7 password cisco username ccna9 privilege 7 password cisco username ccna10 privilege 7 password cisco username ccna11 privilege 7 password cisco ! ip subnet-zero ! ip name-server 192.168.254.254 ! spanning-tree mode pvst no spanning-tree optimize bpdu transmission spanning-tree extend system-id ! interface FastEthernet0/1 description connection to host1A ! interface FastEthernet0/2 description connection to host1B ! interface FastEthernet0/3 description connection to host2A ! interface FastEthernet0/4 description connection to host2B ! interface FastEthernet0/5 description connection to host3A ! interface FastEthernet0/6 description connection to host3B ! interface FastEthernet0/7 description connection to host4A ! interface FastEthernet0/8 description connection to host4B ! interface FastEthernet0/9 description connection to host5A ! interface FastEthernet0/10 description connection to host5B ! interface FastEthernet0/11 description connection to host6A ! interface FastEthernet0/12 description connection to host6B ! interface FastEthernet0/13 description connection to host7A ! interface FastEthernet0/14 description connection to host7B ! interface FastEthernet0/15 description connection to host8A ! interface FastEthernet0/16 description connection to host8B ! interface FastEthernet0/17 description connection to host9A ! interface FastEthernet0/18 description connection to host9B ! interface FastEthernet0/19 description connection to host10A ! interface FastEthernet0/20 description connection to host10B ! interface FastEthernet0/21 description connection to host11A ! interface FastEthernet0/22 description connection to host11B ! interface FastEthernet0/23 ! interface FastEthernet0/24 description connection to R2-Central ! interface GigabitEthernet0/1 ! interface GigabitEthernet0/2 ! interface Vlan1 ip address 172.16.254.1 255.255.0.0 no ip route-cache no shutdown ! ip default-gateway 172.16.255.254 ip http server ip http authentication local privilege exec level 7 show mac-address-table privilege exec level 7 clear mac-address-table dynamic ! banner motd % ******************************************************************* This is Lab switch S1-Central. Authorized access only. ******************************************************************* % ! line con 0 login local line vty 0 4 login local line vty 5 15 login local ! end