As shown in Figure 1, the show ip protocols command is a quick way to verify vital OSPF configuration information. This includes the OSPF process ID, the router ID, networks the router is advertising, the neighbors the router is receiving updates from, and the default administrative distance, which is 110 for OSPF.
Use the Syntax Checker in Figure 2 to verify the OSPF protocol settings of R2 and R3 using the show ip protocols command.