Figure 1 is the reference topology for this topic. OSPFv2 is enabled using the router ospf process-id global configuration mode command. The process-id value represents a number between 1 and 65,535 and is selected by the network administrator. The process-id value is locally significant, which means that it does not have to be the same value on the other OSPF routers to establish adjacencies with those neighbors.

Figure 2 provides an example of entering router OSPF configuration mode on R1.

Note: The list of commands has been altered to display only the commands that are used in this chapter. For a complete list of commands, use the Syntax Checkers in Figure 3.

Use the Syntax Checker in Figure 3 to enter OSPF router configuration mode on R2 and list the commands available at the prompt.