This is third post about OSPF and today I will present totally stub and what each router can see: In this scenario routers R6, R7 and R8 don't have information how to reach R10. R8 and R9 routers (in area 1) can't see area 0 prefixes, only default gateway: R6#sh ip route 10.0.0.0/8 is variably subnetted, 6 subnets, 2 masks C 10.0.0.0/24 is directly connected, FastEthernet0/0 L 10.0.0.6/32 is directly connected, FastEthernet0/0 O IA 10.1.0.0/24 [110/2] via 10.0.0.7, 00:14:18, FastEthernet0/0 O IA 10.2.0.0/24 [110/3] via 10.0.0.7, 00:00:07, FastEthernet0/0 C 10.10.10.0/24 is directly connected, Loopback0 L 10.10.10.6/32 is directly connected, Loopback0 R6#sh ip ospf database database-summary ...