Router: interface FastEthernet0/0 ip address 10.3.5.2 255.255.0 duplex auto speed auto! Interface FastEthernet0/1 ip address 10.3.4.254 255.255.255.0 duplex auto speed auto! Interface Vlan1 no ip address shutdown! Router rip version 2 network 10.0.0.0! Layer-3 Switch on the left: spanning-tree vlan 10, 20, 30 priority 24576 !!!! Interface FastEthernet0/1 channel-group 1 mode on switchport trunk encapsulation dot1q switchport mode trunk! Interface FastEthernet0/2 channel-group 1 mode on switchport trunk encapsulation dot1q switchport mode trunk! Interface FastEthernet0/3 switchport trunk encapsulation dot1q switchport mode trunk! Interface FastEthernet0/23 switchport access vlan 30! Interface FastEthernet0/24 no switchport ip address 10.3.5.1 255.255.0 duplex auto speed auto! Interface GigabitEthernet0/1! Interface GigabitEthernet0/2! Interface Port-channel 1 switchport trunk encapsulation dot1q switchport mode trunk! Interface Vlan1 no ip address shutdown! Interface Vlan10 ip address 10.3.1.254 255.255.255.0! Interface Vlan20 ip address 10.3.2.254 255.255.255.0! Interface Vlan30 ip address 10.3.3.254 255.255.255.0! Router rip version 2 network 10.0.0.0! Layer-3 Switch on the right: spanning-tree vlan 10, 20, 30 priority 28672 !!!! Interface FastEthernet0/1 channel-group 1 mode on switchport trunk encapsulation dot1q switchport mode trunk! Interface FastEthernet0/2 channel-group 1 mode on switchport trunk encapsulation dot1q switchport mode trunk! Interface FastEthernet0/3 switchport trunk encapsulation dot1q switchport mode trunk! Interface FastEthernet0/23 switchport access vlan 40! Interface FastEthernet0/24 no switchport ip address 10.3.4.253 255.255.255.0 duplex auto speed auto! Interface GigabitEthernet0/1! Interface GigabitEthernet0/2! Interface Port-channel 1 switchport trunk encapsulation dot1q switchport mode trunk! Interface Vlan1 no ip address shutdown! Interface Vlan10 no ip address! Interface Vlan20 no ip address! Interface Vlan30 no ip address! Interface Vlan40 ip address 10.3.6.254 255.255.255.0! Router rip version 2 network 10.0.0.0! L2 Switch: interface FastEthernet0/1 switchport access vlan 10 spanning-tree portfast! Interface FastEthernet0/2 switchport access vlan 20 spanning-tree portfast! Interface FastEthernet0/3 switchport mode trunk! Interface FastEthernet0/4 switchport mode trunk! Interface Vlan1 no ip address shutdown! Interface Vlan10 no ip address! Interface Vlan20 no ip address!