Types OSPF routing entries

Code		description
O	OSPF internal area	In the route in the same area Advertising Router LSAs and network LSA
The | A	OSPF internal interregional	In different regions of the same self-routing system Notice Summary LSA
O E1	A type of external routes	Area external routes Notice External LSA
O E2	Type two external routes

O E1 and O E2 default is O E2

O E2 does not count the passed overhead along COST