200-301 Question #1773: Real Exam Question with Answer & Explanation

Question

SIMULATION 70 Please use the "Tasks" and "Topology" tabs to complete this lablet. Topology Tasks Configure OSPF routing for the network by completing the following tasks: Task 1 Configure OSPF on R2. Ensure R1 and R3 become neighbors. Use process ID 10. Use Lo0 IP as the router ID. Under the OSPF process, advertise the following specific prefixes: - 10.0.23.0/28 - 10.0.12.0/30 Task 2 Ensure R2 always becomes the DR. Answer: Configuration on R2 conf t ! interface Loopback0 ip address 10.2.2.2 255.255.255.255 ! interface e0/0 ip address 10.0.12.2 255.255.255.252 ip ospf priority 255 ! interface e0/1 ip address 10.0.23.2 255.255.255.240 ip ospf priority 255 ! router ospf 10 router-id 10.2.2.2 network 10.0.12.0 0.0.0.3 area 0 network 10.0.23.0 0.0.0.15 area 0 end R2 runs OSPF process 10 with router ID 10.2.2.2 (its Loopback0 address). The network commands advertise only the required prefixes 10.0.12.0/30 and 10.0.23.0/28 into area 0, allowing R1 and R3 to form OSPF neighbor relationships with R2. On e0/0 and e0/1, ip ospf priority 255 sets R2's OSPF interface priority to the highest value, so R2 is always elected the DR on its multiaccess OSPF segments.

Options

• taskConfigure OSPF routing for the network on R2. This includes ensuring R1 and R3 become neighbors, using process ID 10, setting Lo0 IP as the router ID, advertising specific prefixes (10.0.23.0/28 and 10.0.12.0/30), and ensuring R2 always becomes the Designated Router (DR).
• prerequisites