350-401 Question #996: Real Exam Question with Answer & Explanation

Question

Lab Simulation 9 Guidelines This is a lab item in which tasks will be performed on virtual devices. - Refer to the Tasks tab to view the tasks for this lab item. - Refer to the Topology tab to access the device console(s) and perform the tasks. - Console access is available for all required devices by clicking the device icon or using the tab(s) above the console window. - All necessary preconfigurations have been applied. - Do not change the enable password or hostname for any device. - Save your configurations to NVRAM before moving to the next item. - Click Next at the bottom of the screen to submit this lab and move to the next question - When Next is clicked, the lab closes and cannot be reopened. Topology Tasks Configure OSPF on all three routers according to the topology to achieve these goals: 1. Configure OSPF without using the "network" statement under the "router ospf" configuration section. 2. Ensure that all networks are advertised between the routers. 3. Configure a single command under each Ethernet interface to prevent OSPF neighbors from participating in a DR/BDR election and ensure that no extra host routes are generated. Answer: Task 1. Configure OSPF without using the "network" statement under the "router ospf" configuration section. R1,R2(config)#interface e0/0 R1,R2(config-if)#ip ospf 1 area 0 R1,R2,R3(config-if)#interface lo0 R1,R2,R3(config-if)#ip ospf 1 area 0 More on R2, R3: R2,R3(config)#interface e0/1 R2,R3(config-if)#ip ospf 1 area 0 Verification R1,R2#show ip ospf neighbor Task 2. Ensure that all networks are advertised between the routers. R1,R2,R3#show ip route (or "show ip route ospf" if possible) to check all advertised routes. Task 3. Configure a single command under each Ethernet interface to prevent OSPF neighbors from participating in a DR/BDR election and ensure that no extra host routes are generated. R1,R2(config)#interface e0/0 R1,R2(config-if)#ip ospf network point-to-point More on R2, R3: R2,R3(config)#interface e0/1 R2,R3(config-if)#ip ospf network point-to-point Note: Setting OSPF to point-to-point mode results in advertised routes containing the actual subnet mask instead of the default behavior of advertising /32 for a loopback interface. Don't forget to save the configuration R1,R2,R3#copy running-config startup-config

Options

• taskConfigure OSPF on all three routers (R1, R2, R3) according to the topology to achieve the following goals: 1) Configure OSPF without using the "network" statement under the "router ospf" configuration section. 2) Ensure that all networks are advertised between the routers. 3) Configure a single command under each Ethernet interface to prevent OSPF neighbors from participating in a DR/BDR election and ensure that no extra host routes are generated.
• prerequisitesConsole access is available for all required devices (R1, R2, R3). All necessary preconfigurations have been applied.