frr version 8.1
frr defaults traditional
hostname Frodo
no ipv6 forwarding
!
interface eth1
 description Gandalf-eth1
 ip address 10.20.20.2/30
exit
!
interface eth2
 description usernet2
 ip address 192.168.2.254/24
 ip ospf passive
exit
!
interface eth3
 description Sam-eth3
 ip address 10.20.20.9/30
exit
!
interface eth4
 description usernet3
 ip address 192.168.5.254/24
 ip ospf passive
exit
!
interface lo
 ip address 10.20.0.2/32
 ip ospf passive
exit
!
router ospf
 ospf router-id 10.20.0.2
 network 10.20.0.2/32 area 1
 network 10.20.20.0/30 area 0
 network 10.20.20.8/30 area 0
 network 192.168.2.0/24 area 1
 network 192.168.5.0/24 area 1
 area 0 filter-list prefix RESTRICT_5_SUBNET in
exit
!
ip prefix-list RESTRICT_5_SUBNET seq 5 deny 192.168.5.0/24
ip prefix-list RESTRICT_5_SUBNET seq 10 permit any
!