ROUTER1R1#show running-config Building configuration...Current configuration : 1227 bytes!version 12.4no service timestamps log datetime msecno service timestamps debug datetime msecno service password-encryption!hostname R1!!!enable secret 5 $1$mERr$9cTjUIEqNGurQiFU.ZeCi1enable password cisco!!!!!!!!!!ip ssh version 1no ip domain-lookup!!!!!!interface FastEthernet0/0 no ip address duplex auto speed auto shutdown!interface FastEthernet0/1 no ip address duplex auto speed auto!interface FastEthernet0/1.10 encapsulation dot1Q 10 ip address 192.168.10.1 255.255.255.0!interface FastEthernet0/1.12 encapsulation dot1Q 12 ip address 10.12.12.1 255.255.255.0!interface FastEthernet0/1.13 encapsulation dot1Q 13 ip address 10.13.13.1 255.255.255.0!interface Serial0/0/0 ip address 10.1.1.1 255.255.255.252 clock rate 64000!interface Serial0/0/1 no ip address shutdown!interface Vlan1 no ip address shutdown!router ospf 1 log-adjacency-changes network 10.1.1.0 0.0.0.3 area 0 network 192.168.10.0 0.0.0.255 area 0 network 10.12.12.0 0.0.0.255 area 0 network 10.13.13.0 0.0.0.255 area 0!router rip network 10.0.0.0 network 192.168.10.0!ip classless!!!!!!!line con 0 password cisco loginline vty 0 4 password cisco login!!!endROUTER 2R2#show running-config Building configuration...Current configuration : 1223 bytes!version 12.4no service timestamps log datetime msecno service timestamps debug datetime msecno service password-encryption!hostname R2!!!enable secret 5 $1$mERr$9cTjUIEqNGurQiFU.ZeCi1enable password cisco!!!!!!!!!!ip ssh version 1no ip domain-lookup!!!!!!interface FastEthernet0/0 no ip address duplex auto speed auto shutdown!interface FastEthernet0/1 no ip address duplex auto speed auto!interface FastEthernet0/1.12 encapsulation dot1Q 12 ip address 10.12.12.2 255.255.255.0!interface FastEthernet0/1.20 encapsulation dot1Q 20 ip address 192.168.20.1 255.255.255.0!interface Serial0/0/0 ip address 10.1.1.2 255.255.255.252!interface Serial0/0/1 ip address 10.2.2.1 255.255.255.252!interface Serial0/1/0 no ip address shutdown!interface Serial0/1/1 no ip address shutdown!interface Vlan1 no ip address shutdown!router ospf 1 log-adjacency-changes network 10.2.2.0 0.0.0.3 area 0 network 10.1.1.0 0.0.0.3 area 0 network 192.168.20.0 0.0.0.255 area 0 network 10.12.12.0 0.0.0.255 area 0!router rip network 10.0.0.0 network 192.168.20.0!ip classless!!!!!!!line con 0 password cisco loginline vty 0 4 password cisco login!!!endROUTER 3R3#show running-config Building configuration...Current configuration : 1043 bytes!version 12.4no service timestamps log datetime msecno service timestamps debug datetime msecno service password-encryption!hostname R3!!!enable secret 5 $1$mERr$9cTjUIEqNGurQiFU.ZeCi1enable password cisco!!!!!!!!!!ip ssh version 1no ip domain-lookup!!!!!!interface FastEthernet0/0 no ip address duplex auto speed auto shutdown!interface FastEthernet0/1 no ip address duplex auto speed auto!interface FastEthernet0/1.13 encapsulation dot1Q 13 ip address 10.13.13.3 255.255.255.0!interface FastEthernet0/1.30 encapsulation dot1Q 30 ip address 192.168.30.1 255.255.255.0!interface Serial0/0/0 no ip address shutdown!interface Serial0/0/1 ip address 10.2.2.2 255.255.255.252!interface Vlan1 no ip address shutdown!router ospf 1 log-adjacency-changes network 192.168.30.0 0.0.0.255 area 0 network 10.2.2.0 0.0.0.3 area 0!router rip network 10.0.0.0 network 192.168.30.0!ip classless!!!!!!!line con 0 password cisco loginline vty 0 4 password cisco login!!!endSWITCH 1S1#show running-config Building configuration...Current configuration : 1736 bytes!version 12.2no service timestamps log datetime msecno service timestamps debug datetime msecno service password-encryption!hostname S1!enable secret 5 $1$mERr$9cTjUIEqNGurQiFU.ZeCi1enable password cisco!no ip domain-lookup!spanning-tree vlan 10 priority 4096!interface FastEthernet0/1!interface FastEthernet0/2 switchport access vlan 10 switchport mode access!interface FastEthernet0/3 switchport access vlan 10 switchport mode access!interface FastEthernet0/4 switchport access vlan 10 switchport mode access!interface FastEthernet0/5 switchport access vlan 10 switchport mode access!interface FastEthernet0/6 switchport access vlan 10 switchport mode access!interface FastEthernet0/7 switchport access vlan 10 switchport mode access!interface FastEthernet0/8 switchport access vlan 10 switchport mode access!interface FastEthernet0/9 switchport access vlan 10 switchport mode access!interface FastEthernet0/10 switchport access vlan 10 switchport mode access!interface FastEthernet0/11!interface FastEthernet0/12!interface FastEthernet0/13!interface FastEthernet0/14!interface FastEthernet0/15!interface FastEthernet0/16!interface FastEthernet0/17!interface FastEthernet0/18!interface FastEthernet0/19!interface FastEthernet0/20!interface FastEthernet0/21!interface FastEthernet0/22!interface FastEthernet0/23!interface FastEthernet0/24!interface GigabitEthernet1/1 switchport trunk native vlan 99 switchport mode trunk!interface GigabitEthernet1/2!interface Vlan1 no ip address shutdown!interface Vlan10 no ip address!!line con 0 password cisco login!line vty 0 4 password cisco loginline vty 5 15 password cisco login!!endSHITCH 2SWITCH 3S3#show %CDP-4-NATIVE_VLAN_MISMATCH: Native VLAN mismatch discovered on GigabitEthernet1/1 (99), with S1 GigabitEthernet1/2 (1).runS3#show running-config Building configuration...Current configuration : 1207 bytes!version 12.2no service timestamps log datetime msecno service timestamps debug datetime msecno service password-encryption!hostname S3!enable secret 5 $1$mERr$9cTjUIEqNGurQiFU.ZeCi1enable password cisco!no ip domain-lookup!!interface FastEthernet0/1!interface FastEthernet0/2!interface FastEthernet0/3!interface FastEthernet0/4!interface FastEthernet0/5!interface FastEthernet0/6!interface FastEthernet0/7!interface FastEthernet0/8!interface FastEthernet0/9!interface FastEthernet0/10!interface FastEthernet0/11!interface FastEthernet0/12!interface FastEthernet0/13!interface FastEthernet0/14!interface FastEthernet0/15!interface FastEthernet0/16!interface FastEthernet0/17!interface FastEthernet0/18!interface FastEthernet0/19!interface FastEthernet0/20!interface FastEthernet0/21!interface FastEthernet0/22!interface FastEthernet0/23!interface FastEthernet0/24!interface GigabitEthernet1/1 switchport trunk native vlan 99 switchport mode trunk!interface GigabitEthernet1/2!interface Vlan1 no ip address shutdown!!line con 0 password cisco login!line vty 0 4 password cisco loginline vty 5 15 password cisco login!!end