Then we study OSPF neighbor/adjacency requirements from the perspective of troubleshooting potential problems that can prevent routers from successfully forming OSPF adjacencies. Then we learn how to manually configure the OSPF network type of an interface on a router. We configure the clock rate on the DCE side of a serial connection, and we configure PPP encapsulation on a point-to-point router. A brief discussion of the characteristics and configuration of serial connections is offered because the topic comes up when discussing the point-to-point network type. We discuss the role and election of designated routers and backup designated routers in a subnet and we configure the OSPF interface priority on a router in an OSPF broadcast network. Then we discuss OSPF network types, focusing on the broadcast network type and the point-to-point network type.
Configuring a loopback interface on a router provides an interface with an IP address that is always up and can consistently be used to identify and reach the router. We begin with some notes on loopback interfaces. This is the third and final installment of my study notes on the topic of OSPF for the CCNA.
