CCNP ROUTE: 2.OSPF Neighborships over WANs: Broadcast, Point-to-Point and Nonbroadcast (NBMA)

On LAN interfaces:  
-default OSPF network type BROADCAST
-DR/BDR are elected, dynamic discovery of neighbors, more than 2 routers allowed in a subnet, Hello interval 10.

On R9's LAN interface to R12:
R9#show ip ospf interface fastEthernet 0/0
FastEthernet0/0 is up, line protocol is up
Internet Address 192.168.3.1/30, Area 3
Process ID 1, Router ID 9.9.9.9, Network Type BROADCAST, Cost: 10
Transmit Delay is 1 sec, State BDR, Priority 1
Designated Router (ID) 12.12.12.12, Interface address 192.168.3.2
Backup Designated router (ID) 9.9.9.9, Interface address 192.168.3.1
Timer intervals configured, Hello 10, Dead 40, Wait 40, Retransmit 5

On point-to-point interfaces: 
-default OSPF network type POINT-TO-POINT
-NO DR/BDR are elected, dynamic discovery of neighbors, ONLY 2 routers allowed in a subnet, Hello interval 10.

On router R9's serial interface to R1:
R9#show ip ospf interface serial 0/0
Serial0/0 is up, line protocol is up
Internet Address 192.168.0.22/30, Area 0
Process ID 1, Router ID 9.9.9.9, Network Type POINT_TO_POINT, Cost: 64
Transmit Delay is 1 sec, State POINT_TO_POINT
Timer intervals configured, Hello 10, Dead 40, Wait 40, Retransmit 5

On physical and multipoint subinterfaces: 
-default OSPF network type NONBROADCAST (NBMA)
-DR/BDR are elected, NO dynamic discovery of neighbors, more than 2 routers allowed in a subnet, Hello interval 30.

On router R9's serial interface to the Frame Relay cloud:
R9#show ip ospf interface serial 0/1.1
Serial0/1.1 is up, line protocol is up
Internet Address 10.0.1.1/29, Area 2
Process ID 1, Router ID 9.9.9.9, Network Type POINT_TO_MULTIPOINT, Cost: 64
Transmit Delay is 1 sec, State POINT_TO_MULTIPOINT
Timer intervals configured, Hello 30, Dead 120, Wait 120, Retransmit 5

Since for OSPF network type NONBROADCAST neighbors are not dynamically discovered, they have to be statically configured, as seen below:
R9#show run | s ospf
 ip ospf network point-to-multipoint non-broadcast
router ospf 1
 router-id 9.9.9.9
 log-adjacency-changes
 area 3 nssa no-summary
 network 10.0.1.0 0.0.0.255 area 2
 network 192.168.0.20 0.0.0.3 area 0
 network 192.168.3.0 0.0.0.3 area 3
 neighbor 10.0.1.3
 neighbor 10.0.1.2