Notice that when the network for the serial link from R1 to R2 is added to the OSPF configuration,
the router sends a notification message to the console stating that a neighbor relationship with
another OSPF router has been established.
Step 4: Configure the router to advertise the 192.168.10.8/30 network attached to the
Serial0/0/1 interface.
When you are finished, return to privileged EXEC mode