frr defaults traditional
hostname abr1
log file /tmp/ospfd.log
!
interface eth1
 ip address 10.205.16.2/30
 ip ospf network point-to-point
 ip ospf cost 10
!
interface eth2
 ip address 10.205.1.1/30
 ip ospf network point-to-point
 ip ospf cost 10
!
router ospf
 ospf router-id 10.205.0.12
 network 10.205.16.0/20 area 1
 network 10.205.1.0/30 area 0