Configuration of the my routers:


Router 1: 

interface FastEthernet1/0
 description Conexao c/ Itau CTO – Link da Brasil Telecom
 ip address 192.168.255.26 255.255.255.252
 ip ospf message-digest-key 1 md5 <removed>
 speed 100
 duplex full
!
router ospf 10
 log-adjacency-changes
 area 3 authentication message-digest
 redistribute static subnets
 network 192.168.255.24 0.0.0.3 area 3
!
ip classless
ip route 172.248.7.0 255.255.255.0 192.168.52.50
ip route 172.248.7.42 255.255.255.255 192.168.52.8
ip route 172.248.7.69 255.255.255.255 192.168.52.8
ip route 172.248.7.72 255.255.255.255 192.168.52.8
ip route 192.168.52.0 255.255.255.0 192.168.52.50


Router 2:

interface FastEthernet1/0
 ip address 192.168.255.46 255.255.255.252
 ip ospf message-digest-key 1 md5 <chave>
 speed 100
 duplex full
!
router ospf 10
 log-adjacency-changes
 area 3 authentication message-digest
 redistribute static subnets
 network 192.168.255.44 0.0.0.3 area 3
!
ip classless
ip route 172.248.7.0 255.255.255.0 192.168.52.50
ip route 172.248.7.42 255.255.255.255 192.168.52.8
ip route 172.248.7.69 255.255.255.255 192.168.52.8
ip route 172.248.7.72 255.255.255.255 192.168.52.8
ip route 192.168.52.0 255.255.255.0 192.168.52.50

======================================================

Configuration of the customers routers:


Router 1:

interface FastEthernet0/1
 ip address 192.168.255.25 255.255.255.252
 no ip directed-broadcast
 ip ospf message-digest-key 1 md5 <removed>
 speed 100
 duplex full
!
router ospf 10
 area 3 authentication message-digest
 redistribute static metric 1 subnets
 network 192.168.255.24 0.0.0.3 area 3
!
ip classless
ip route 0.0.0.0 0.0.0.0 10.56.4.102


Router 2:

interface FastEthernet0/1
 ip address 192.168.255.45 255.255.255.252
 ip ospf message-digest-key 1 md5 <removed>
 speed 100
 duplex full
!
router ospf 10
 area 3 authentication message-digest
 redistribute static metric 1 subnets
 network 192.168.255.44 0.0.0.3 area 3
!
ip classless
ip route 0.0.0.0 0.0.0.0 10.56.4.102


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Logs of my router:

ORBIPI-06-PIT_D-3845#sh ip ospf neighbor

Neighbor ID     Pri   State          	Dead Time	Address			Interface
192.168.255.45    1   EXSTART/BDR    	00:00:31    	192.168.255.45		FastEthernet1/0
192.168.201.22    1   FULL/BDR       	00:00:37    	192.168.52.6   		GigabitEthernet0/0
192.168.201.23    1   FULL/DR        	00:00:31    	192.168.52.7  		GigabitEthernet0/0
192.168.201.32    1   2WAY/DROTHER   	00:00:39    	192.168.52.2   		GigabitEthernet0/0
192.168.201.32    1   FULL/BDR       	00:00:39    	192.168.16.25  		GigabitEthernet0/1

ORBIPI-06-PIT_D-3845#debug ip ospf adj
ORBIPI-06-PIT_D-3845#debug ip ospf 
Mar 20 01:54:41 Orbital: OSPF: Send DBD to 192.168.255.45 on FastEthernet1/0 seq 0x1C84 opt 0x52 flag 0x7 len 32
Mar 20 01:54:41 Orbital: OSPF: Send with youngest Key 0
Mar 20 01:54:41 Orbital: OSPF: Retransmitting DBD to 192.168.255.45 on FastEthernet1/0 [24]
Mar 20 01:54:42 Orbital: OSPF: Rcv hello from 192.168.201.23 area 0 from GigabitEthernet0/0 192.168.52.7
Mar 20 01:54:42 Orbital: OSPF: End of hello processing
Mar 20 01:54:46 Orbital: OSPF: Send DBD to 192.168.255.45 on FastEthernet1/0 seq 0x1C84 opt 0x52 flag 0x7 len 32
Mar 20 01:54:46 Orbital: OSPF: Send with youngest Key 0
Mar 20 01:54:46 Orbital: OSPF: Retransmitting DBD to 192.168.255.45 on FastEthernet1/0 [25]
Mar 20 01:54:47 Orbital: OSPF: Rcv hello from 192.168.255.45 area 3 from FastEthernet1/0 192.168.255.45
Mar 20 01:54:47 Orbital: OSPF: End of hello processing
Mar 20 01:55:07 Orbital: OSPF: Nbr 192.168.255.45 192.168.255.45 FastEthernet1/0 is currently ignored
Mar 20 01:55:35 Orbital: %OSPF-5-ADJCHG: Process 10, Nbr 192.168.255.45 on FastEthernet1/0 from DOWN to DOWN, Neighbor Down: Interface down or detached


Logs of the customer router:

Mar 20 03:26:42.595: %OSPF-4-NONEIGHBOR: Received database description from unknown neighbor 192.168.255.46