interface eth1
 ip ospf area 2
!
interface tun0
 ip ospf area 0
!
interface tun1
 ip ospf area 0
!
interface tun2
 ip ospf area 1
!
router ospf
 ospf router-id 0.0.0.1
 passive-interface eth0
 passive-interface eth1
 passive-interface tun2
!