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PART I - OSPF Cоnfigurаtiоn (40pts) Objective The оbjective of this lаb is to configure аnd troubleshoot Open Shortest Path First (OSPF) routing in a multi-router network using Cisco Packet Tracer, with a focus on manipulating DR/BDR roles. Download this template. Note IP addressing has not been done on this template. Topology 3x Cisco 1941 Routers 3x Cisco 2960 Switches 6x End devices (e.g., PCs) IP Addressing Scheme Network Segments Router-to-Router: R0-R1: 172.16.1.0/30 R1-R2: 172.16.1.4/30 R0-R2: 172.16.1.8/30 LAN Segments: R0 LAN: 10.0.1.0/24 R1 LAN: 10.0.2.0/24 R2 LAN: 10.0.3.0/24 Configuration Tasks Initial Setup (10pts): Routers Download the provided template provided above. Configure all router interfaces with the correct IP addresses and subnet masks. Enable all interfaces. PCs: Assign static IP addresses to each PC within their respective LAN segments. Configure the default gateway for each PC to be the IP address of its connected router's LAN interface. OSPF Configuration (10pts): On all three routers, enable the OSPF routing process with a process ID of 10. On each router, advertise all connected networks into OSPF Area 0. On all routers, prevent OSPF Hello packets from being sent on the LAN interfaces (GigabitEthernet0/0). Set a static router ID on each router (e.g., R0: 10.10.10.10, R1: 20.20.20.20, R2: 30.30.30.30). Reload the routers to ensure the new router IDs are used. Set the Hello Timer on all three routers to 40 seconds and the dead timer to 120 seconds. Verification (10pts): Verify OSPF adjacency with neighbors on each router. Screenshot results from R0. Confirm that each router has learned routes to all other networks in the topology. Screenshot results on R1. Ping from PC0 to PC5. All pings should be successful. Screenshot results (include full screen so I can see the device you are sourcing from) Screenshot of the command 'show ip ospf interface' on R2 DR/BDR Manipulation Tasks After completing the initial setup and OSPF configuration, perform the following tasks to manage the Designated Router (DR) and Backup Designated Router (BDR) roles. Initial DR/BDR Verification (3pts): Verify your config worked and answer the questions below. Which Router is the DR? Which Router is the BDR? Screenshot the results of your commands that show which router is the DR and BDR. Force DR/BDR Selection (3pts): On the interface connecting R0 and R1, set the OSPF priority on R0 to 150 and on R1 to 100. On interface connecting R1 and R2, set the OSPF priority on R1 to 200 and on R2 to 100. Reset the OSPF processes on the routers to force a new DR/BDR election. Verify DR/BDR Change (4pts): Verify your changes worked and answer the questions below. Which Router is the DR? Which Router is the BDR? Screenshot the results of your commands that show which router is the DR and BDR. Save your packet tracer as Exam1-Configuration-Completed PART II - Troubleshooting (10pts) Download this Packet Tracer to complete this section. You are a network engineer for a local soda pop company. You have three branches offices. SLC, STG, and DEN are connected via WAN connections in a mesh configuration. You are hearing reports that connections between STG and SLC are experiencing intermittent issues resulting in connection timeouts. You have been tasked with implementing a change in your OSPF configuration that will leave the affected link up but route traffic between SLC and STG to DEN first. Before you start do a trace route from PC0 to PC2 and screenshot the results. Implement your fix. Verify What Command did you use? What is the Administrative Distance and Cost of the route 144.38.5.0 from STG-R1? Note: this should be written as [num/num] Why did this command achieve the desired result? Take a screenshot of a trace route from PC0 to PC2. Save your packet tracer as Exam1-Troubleshooting-Completed What to Submit PART I 4 Screenshots from PART I section 3. Exam 1 - Configuration Packet Tracer file. Part II Before and After Screenshots of the trace route from PC0 to PC2 Answers to the questions. Exam 1 Troubleshooting Packet Tracer file.
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