frr defaults traditional
hostname a
log file /tmp/ospfd.log
!
interface lo
 ip address 10.205.0.1/32
!
! hacia b
interface eth1
 ip address 10.205.12.1/30
 ip ospf network point-to-point
 ip ospf cost 3
!
! hacia c
interface eth2
 ip address 10.205.13.1/30
 ip ospf network point-to-point
 ip ospf cost 1
!
router ospf
 ospf router-id 10.205.0.1
 log-adjacency-changes detail
 network 10.205.0.0/16 area 0