Path Preference
1 Intra-Area (O) – routes learned from the same area
2 Inter-area (O IA) – routes learned from a different area
3 External Type 1 (E1) – routes learned from outside OSPF marked as E1
4 External Type 2 (E2) – routes learend outside of OSPF marked as E2
5 NSSA Type 1 (N1) – routes learned from a NSSA area marked as N1
6 NSSA Type 2 (N2) – routes learned from a NSSA area marked as N2
sh ip route ospf
