log stdout
interface lo
 ip address 192.0.2.3/32
!
interface r3-eth0
 ip address 172.31.0.3/24
 mpls enable
!
interface r3-eth1
 ip address 172.31.4.3/24
 mpls enable
!
interface r3-eth2
 ip address 172.31.5.3/24
 mpls enable
!