27405147 Exploration Routing OSPF Skills Based Assessment

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Exploration Routing: OSPF Skills Based Assessment

Learning Objectives

Upon completion of this lab, you will be able to:

Create an addressing scheme to accommodate the hosts on the network

Cable network according to the diagram

Configure OSPF

Configure OSPF priorities

Configure OSPF cost

Verify OSPF operation

Configure a static default route

Scenario

You are a network engineer for an ISP with multiple locations that are connected through a switch. You areassigned the task of creating an addressing scheme for each client’s LAN. You must set the OSPF prioritiesso that the ISP router is the DR and the Remote_1 router is the BDR. You must also make sure that theRemote_2 router never takes part in the DR/BDR election.

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CCNA ExplorationRouting Protocols and Concepts Exploration Routing: OSPF Skills Based Assessment

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Task 1: Create an Addressing Scheme.

Step 1: Create an addressing scheme for each LAN using the 192.168.1.0/24 address space.

Remote_1:

Lo0: 60 Hosts

Lo1: 12 HostsRemote_2:

Lo0: 62 Hosts

L01: 28 Hosts

Step 2: Record the appropriate subnet address and mask in Table 1.

Table 1

Device Interface IP Address Subnet Mask

ISPFa0/0

Lo0

Remote_1Fa0/0

Lo0

Lo1

Remote_2Fa0/0

Lo0

Lo1

Instructor’s Initial ______  

Task 2: Cable and Configure Network.

Step 1 Cable the network according to the Topology Diagram.

Step 2 Place the correct interface address for each router in Table 2.

Table 2Device Interface IP Address Subnet Mask

ISPFa0/0 10.10.10.1 255.255.255.248

Lo0 188.46.37.254 255.255.255.252

Remote_1Fa0/0 10.10.10.3 255.255.255.248

Lo0

Lo1

Remote_2 Fa0/0 10.10.10.2 255.255.255.248

Lo0

Lo1

Step 3 Verify the configurations.

Instructor’s Initial ______  

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CCNA ExplorationRouting Protocols and Concepts Exploration Routing: OSPF Skills Based Assessment

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Task 3: Basic OSPF Configuration. 

Step 1 Configure OSPF on each router.

Use Process ID 1and advertise all directly connected networks in OSPF Area 0. Do not advertise theloopback interface on the ISP router.

Step 2 Verify the OSPF configuration.

Confirm that each router has formed an adjacency with one another and has a path to each network in thetopology.

Instructor’s Initial ______  

Task 4: Confirm OSPF Priorities.

Step 1: Verify the OSPF priorities.

Confirm that the DR/BDR election took place and that the Remote_2 router is the DR, Remote_1 is theBDR and the ISP router is the DROTHER.

Step 2: Configure the ISP router with the highest possible OSPF priority.

Step 3: Assure that the Remote_2 router will never take place in the DR/BDR election process.

Step 4: Reboot the switch using the reload command to force the OSPF election process.

Step 5: Verify that the OSPF election has occurred.

Confirm that the ISP router is now the DR, the Remote_1 router is the BDR and the Remote_2 router is nowthe DROTHER.

Instructor’s Initial ______  

Task 5: Configure OSPF Cost.

Step 1: Set the cost on the Remote_2 WAN link to a value of 1.

Step 2: Set the cost of the ISP WAN link to a value of 100.

Step 3: Verify the cost in the routing table.

Instructor’s Initial ______  

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CCNA ExplorationRouting Protocols and Concepts Exploration Routing: OSPF Skills Based Assessment

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Task 6: Verify OSPF Operation.

Step 1: Verify neighbor adjacencies.

Step 2: Verify that all networks are present in the routing table.

Instructor’s Initial ______  

Task 7: Static Default Route

Step 1: Configure a static default route on the ISP router.

Step 2: Propagate the static default route to the other routers in the network.

Step 3: Verify that each router can see the static default route in their routing table.

Instructor’s Initial ______  

Task 8: Verify Connectivity

Step 1 Ping the loopback interface on the ISP router from the Remote_1 and Remote_2 routers.

Instructor’s Initial ______