enable
configure terminal
interface e0/0
 no ip address
 no shutdown
interface e0/1
 no ip address
 no shutdown
interface e0/0.30
 encapsulation dot1Q 30
 ip address 10.10.3.1 255.255.255.0
interface e0/0.40
 encapsulation dot1Q 40
 ip address 10.10.4.1 255.255.255.0
interface e0/1.60
 encapsulation dot1Q 60
 ip address 10.10.6.1 255.255.255.0
interface e0/2
 ip address 55.55.55.105 255.255.255.252
 no shutdown
ip route 0.0.0.0 0.0.0.0 55.55.55.106
ip access-list standard NAT_ACL
 permit 10.10.0.0 0.0.255.255
interface e0/0
 ip nat inside
interface e0/1
 ip nat inside
interface e0/2
 ip nat outside
ip nat inside source list NAT_ACL interface e0/2 overload
end
write memory