Configure ospf for a topology of three routers with five networks in area 0
OSPF Configuration Step by Step Guide
Preview of the OSPF Commands Optional Commands: Rtr(config-router)# default-information originate (Send default) Rtr(config-router)# area area authentication. - ppt download
Redistribute OSPF Route into BGP in Cisco IOS Router
How to Configure OSPF on Cisco Routers? – Router Switch Blog