Packet Tracer - Verify Single-Area OSPFv2 done

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Packet Tracer - Verify Single-Area OSPFv2 Addressing Table Device Interface IP Address Subnet Mask Default Gateway R1 R1 R1 R1 G0/0 172.16.1.1 255.255.255.0 N/A N/A N/A N/A G0/1 64.100.54.6 255.255.255.252 S0/0/0 172.16.3.1 255.255.255.252 S0/0/1 192.168.10.5 255.255.255.252 R2 G0/0 172.16.2.1 255.255.255.0 N/A R2 S0/0/0 172.16.3.2 255.255.255.252 N/A R2 S0/0/1 192.168.10.9 255.255.255.252 N/A R3 R3 R3 R3 G0/0 192.168.1.1 255.255.255.0 N/A N/A N/A N/A G0/1 192.168.11.1 255.255.255.0 S0/0/0 192.168.10.6 255.255.255.252 S0/0/1 192.168.10.10 255.255.255.252 R4 G0/0/0 192.168.1.2 255.255.255.0 N/A R4 G0/0/1 192.168.11.1 255.255.255.0 N/A ISP Router NIC 64.100.54.5 255.255.255.252 N/A PC1 NIC 172.16.1.2 255.255.255.0 172.16.1.1 PC2 NIC 172.16.2.2 255.255.255.0 172.16.2.1 PC3 NIC 192.168.1.2 255.255.255.0 192.168.1.1 Laptop NIC DHCP DHCP DHCP Objectives In this lab, you will use the CLI commands to verify the operation of an existing OSPFv2 network. In Part 2, you will add a new LAN to the configuration and verify connectivity. • Identify and verify the status of OSPF neighbors. • Determine how the routes are being learned in the network. • Explain how the neighbor state is determined. • Examine the settings for the OSPF process ID. • Add a new LAN into an existing OSPF network and verify connectivity. © 2019 - 2019 Cisco and/or its affiliates. All rights reserved. Cisco Public Page 1 of 5 www.netacad.com

Packet Tracer - Verify Single-Area OSPFv2 Background / Scenario You are the network administrator for a branch office of a larger organization. Your branch is adding a new wireless network into an existing branch office LAN. The existing network is configured to exchange routes using OSPFv2 in a single-area configuration. Your task is to verify the operation of the existing OSPFv2 network, before adding in the new LAN. When you are sure that the current OSPFv2 LAN is operating correctly, you will connect the new LAN and verify that OSPF routes are being propagated for the new LAN. As branch office network administrator, you have full access to the IOS on routers R3 and R4. You only have read access to the enterprise LAN routers R1 and R2, using the username BranchAdmin , and the password Branch1234 . Instructions ***Answer the questions with ___________*** Part 1: Verify the existing OSPFv2 network operation. The following commands will help you find the information needed to answer the questions: show ip interface brief show ip route show ip route ospf show ip ospf neighbor show ip protocols show ip ospf show ip ospf interface Step 1: Verify OSPFv2 operation. Wait until STP has converged on the network. You can click the Packet Tracer Fast Forward Time button to speed up the process. Continue only when all link lights are green. a. Log into router R1 using the username BranchAdmin and the password Branch1234 . Execute the show ip route command. Open configuration window R1# show ip route --- output omitted ---- Gateway of last resort is 172.16.3.2 to network 0.0.0.0 172.16.0.0/16 is variably subnetted, 5 subnets, 3 masks C 172.16.1.0/24 is directly connected, GigabitEthernet0/0 L 172.16.1.1/32 is directly connected, GigabitEthernet0/0 O 172.16.2.0/24 [110/65] via 172.16.3.2, 00:02:18, Serial0/0/0 C 172.16.3.0/30 is directly connected, Serial0/0/0 L 172.16.3.1/32 is directly connected, Serial0/0/0 O 192.168.1.0/24 [110/65] via 192.168.10.6, 00:02:18, Serial0/0/1 192.168.10.0/24 is variably subnetted, 3 subnets, 2 masks C 192.168.10.4/30 is directly connected, Serial0/0/1 L 192.168.10.5/32 is directly connected, Serial0/0/1 O 192.168.10.8/30 [110/128] via 172.16.3.2, 00:02:18, Serial0/0/0 [110/128] via 192.168.10.6, 00:02:18, Serial0/0/1 O*E2 0.0.0.0/0 [110/1] via 172.16.3.2, 00:02:18, Serial0/0/0 Questions: How did router R1 receive the default route? _The default route was learned through OSPF. © 2019 - 2019 Cisco and/or its affiliates. All rights reserved. Cisco Public Page 2 of 5 www.netacad.com

Packet Tracer - Verify Single-Area OSPFv2 _______________ Type your answers here. From which router did R1 receive the default route? __Router R2 _____________ Type your answers here. How can you filter the output of show ip route to show only the routes learned through OSPF? show Ip route________________________ Type your answers here. Use b. Execute the show ip ospf neighbor command on R1 . Questions: Which routers have formed adjacencies with router R1? _R2 and R3 ____________ Type your answers here. What are the router IDs and state of the routers shown in the command output? ___2.2.2.2 – Full/- and 3.3.3.3 – Full/- ____________ Type your answers here. Are all of the adjacent routers shown in the output? _yes_______________ Type your answers here. c. Using the command prompt on PC1 , ping the address of the ISP Router shown in the Address Table. Is it successful? If not, do a clear ospf process command on the routers and repeat the ping command. Step 2: Verify OSPFv2 operation on R2. a. Log into router R2 using the username BranchAdmin and the password Branch1234 . Execute the show ip route command. Verify that routes to all the networks in the topology are shown in the routing table. Question: How did router R2 learn the default route to the ISP? __It was statically configured by the administrator. _______________ Type your answers here. b. Enter the show ip ospf interface g0/0 on router R2 . Questions: What type of OSPF network is attached to this interface? BROADCAST ______________ Type you answers here. Are OSPF hello packets being sent out this interface? Explain. _No. The interface is configured as a passive interface in OSPF. © 2019 - 2019 Cisco and/or its affiliates. All rights reserved. Cisco Public Page 3 of 5 www.netacad.com

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Packet Tracer - Verify Single-Area OSPFv2 _____________ Type your answers here. c. Using the command prompt on PC2 , ping the S0/0/1 address on router R3 . Question: Is it successful? __yes____________ Type your answers here. Step 3: Verify OSPFv2 operation on R3. a. Execute the show ip protocols command on router R3. Question: Router R3 is routing for which networks? _192.168.1.0/24, 192.168.10.4/30, and 192.168.10.8/30 _____________ Type your answers here. b. Execute the show ip ospf neighbor detail command on router R3 . Question: What is the neighbor priority shown for the OSPF neighbor routers? This value is the default. _0________________ Type your answers here. c. Using the command prompt on PC3 , ping the address of the ISP Router shown in the Address Table. Question: Is it successful? __Yes____________ Type your answers here. Close configuration window Part 2: Add the new Branch Office LAN to the OSPFv2 network. You will now add the pre-configured Branch Office LAN to the OSPFv2 network. Step 1: Verify the OSPFv2 configuration on router R4. Open configuration window Execute a show run | begin router ospf command on router R4 . Verify that the network statements are present for the networks that are configured on the router. Which interface is configured to not send OSPF update packets? __Interface GigabitEtherenet0/0/1 ___________ Type your answers here. Step 2: Connect the Branch Office router R4 to the OSPFv2 network. a. Using the correct Ethernet cable, connect the G0/0/0 interface on router R4 to the G0/1 interface on switch S3 . Use the show ip ospf neighbor command to verify that router R4 is now adjacent with router R3. Question: What state is displayed for router R3 ? ___FULL/DR ____________ Type your answers here. © 2019 - 2019 Cisco and/or its affiliates. All rights reserved. Cisco Public Page 4 of 5 www.netacad.com

Packet Tracer - Verify Single-Area OSPFv2 b. Using the show ip ospf neighbor command on R3 , determine the state of router R4 . There may be a delay while OSPF converges. Question: Why is the state of router R4 different than the state of R1 and R2? __Because the OSPF network type between R1 and R2 is Point-to-Point, there is no OSPF election. R4 is on the same Ethernet network segment as router R3, so the OSPF network type is Broadcast and there is an OSPF election.______________ c. Using the command prompt on Laptop, ping the address of PC2. Question: Is it successful? ___yes___________ Type your answers here. Close configuration window End of document © 2019 - 2019 Cisco and/or its affiliates. All rights reserved. Cisco Public Page 5 of 5 www.netacad.com

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