-- Router 1 ---

interface Tunnel0
ip address 172.17.1.1 255.255.255.0
...
ip ospf network broadcast
...

router ospf 1
 log-adjacency-changes
 redistribute connected subnets
 redistribute static subnets
 network 172.17.1.0 0.0.0.255 area 0
 network 192.168.255.1 0.0.0.0 area 0

r1#sh ip ospf nei

Neighbor ID     Pri   State           Dead Time   Address         Interface
192.168.255.5     1   FULL/DR         00:00:02    172.17.1.2      Tunnel0


---Router 2----

router ospf 1
 log-adjacency-changes
 redistribute connected subnets
 redistribute static subnets
 network 172.17.1.0 0.0.0.255 area 0
 network 192.168.255.2 0.0.0.0 area 0

interface Tunnel0
ip address 172.17.1.2 255.255.255.0
...
ip ospf network broadcast
...



r2#sh ip ospf nei

Neighbor ID     Pri   State           Dead Time   Address         Interface
192.168.255.1     1   FULL/BDR        00:00:36    172.17.1.1      Tunnel0