# FRR 7.5.1
```
interface eth0.202
ip ospf authentication message-digest
ip ospf message-digest-key 10 md5 vyosnet
!
router ospf
ospf router-id 172.18.254.202
log-adjacency-changes detail
passive-interface default
no passive-interface eth0.202
network 172.18.202.0/24 area 0
network 172.18.254.202/32 area 0
!
```
# FRR 8
```
interface eth0.202
ip ospf authentication message-digest
ip ospf message-digest-key 10 md5 vyosnet
no ip ospf passive
!
router ospf
ospf router-id 172.18.254.202
log-adjacency-changes detail
passive-interface default
network 172.18.202.0/24 area 0
network 172.18.254.202/32 area 0
!
```