PKA 5.2.2.3 Troubleshooting Single-Area OSPFv2

R1>ena

R1#sh run 

R1#conf t

R1(config)#router ospf 1

R1(config-router)#no network 172.16.10.4 0.0.0.3 area 0

R1(config-router)#network 192.168.10.4 0.0.0.3 area 0

R1(config-router)#end

R1#show ip ospf neighbor

R2>ena

R2#sh run

R2#conf t

R2(config)#router ospf 1

R2(config-router)#default-information originate

R3>ena

R3#sh run

R3#show ip ospf neighbor