Router(config-if)# ip ospf
cost number
Configuring Authentication:
Router(config-if)# ip ospf authentication-key password
Router(config-router)# area number authentication
[message-digest]
Configuring OSPF Timers:
Router(config-if)# ip ospf
message-digest-key key-id md5 [encryption-type]
password
Router(config-if)# ip ospf hello-interval seconds
Router(config-if)# ip ospf dead-interval seconds