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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