frr defaults traditional
hostname r3
log file /tmp/ospfd.log
!
interface lo
 ip address 10.205.0.3/32
!
! hacia r1
interface eth1
 ip address 10.205.13.2/30
 ip ospf network point-to-point
!
! hacia r2
interface eth2
 ip address 10.205.23.2/30
 ip ospf network point-to-point
!
! hacia r5
interface eth3
 ip address 10.205.35.1/30
 ip ospf network point-to-point
!