Case Study Routing & Switching Cisco Networking Academy Routing and Switching: Scaling Network Case Study
Overview and Objectives This case study allows students to build and configure a complex network using skills gained throughout the course. This case study is not a trivial task. To complete it as outlined with all required documentation will be a significant accomplishment. The case study scenario describes the project in general terms, and will explain why the network is being built. Following the scenario, the project is broken into a number of phases, each of which has a detailed list of requirements. It is important to read and understand each requirement to make sure that the project is completed accurately. The following tasks are required to complete this case study: Set up the physical layout of the network using the diagram and accompanying narrative Correctly configure multi-area OSPF with MD5 authentication Correctly configure s and 802.1q trunking Correctly configure STP Correctly configure when required Correctly configure Multi-area OSPF routing Correctly configure Correctly configure DHCP Correctly configure NAT Create and apply access control lists (ACL S) on the appropriate routers and interfaces Verify/test and document that all devices are operational and functioning according to the scenario guidelines Provide detailed documentation in a prescribed form as listed in the deliverables sections 2-2 CCNA 2: WAN Technologies v3.1 Copyright ~ 2003, Cisco Systems, Inc.
Scenario Go/o 209.1.1.1/32 10.0.0.1/30 10.0.0.5/30 Belfast s A company needs a network to be designed and implemented; the company has locations in four cities. All of the locations will be connected using leased-line serial links. The company has previously used RIP version 2; however, all four locations will use OSPF routing process. Also, default static route must be used to access the internet. One location, Belfast, has a large and complex LAN. Due to the size and complexity, the company wants to create s to control broadcasts, enhance security, and logically group users. The company also wants to use private addresses throughout the Autonomous System, DHCP over most of the LAN segments, and NAT implemented for Internet connectivity. The company also wishes to limit Internet access to Web traffic while allowing multiple protocols (not all) within its own WAN. Although private addresses (RFC 1918) will be used, the company appreciates efficiency and address conservation in design. To minimize wasted address space, they have requested VLSM to be used when appropriate. Copyright ~ 2003, Cisco Systems, Inc. Case Study: WANs 3-9
Phase 1: Addressing the WAN & LAN Go/o 209.1.1.1/32 10.0.0.1/30 10.0.0.5/30 Belfast s Use the following instructions to complete Phase 1: Use for internal addressing with IP subnet zero enabled. Apply /30 subnets on all serial interfaces, using the last available subnet. Assign an appropriately sized subnet for the Belfast LAN, which has about 900 devices: - 99: 40 devices (Management ) - 2: 120 hosts - 3: 250 hosts - 4: 500 hosts Assign the appropriately sized subnet to the LAN, which has 200 hosts. Assign an appropriately sized subnet for the s 2 LANs, which have 400 devices. Assign the appropriately sized subnet to the LAN, which has 100 hosts Document all of the addressing in tables. DHCP POOL Configure DHCP services on the router. DHCP should provide services to the following LANs hosts: Belfast s 2, 3 and 4 DHCP should pass the following parameters to the hosts: IP address, Subnet Mask, Default Gateway and DNS (10.0.0.4) 4-4 CCNA 4: WAN Technologies v3.1 Copyright ~ 2003, Cisco Systems, Inc.
Phase 2: Configuring Default Routes, OSPF Routing and Go/o 209.1.1.1/32 10.0.0.1/30 10.0.0.5/30 Belfast s Use the following instructions to complete Phase 2: Configure each router with a hostname and required passwords. Configure each interface on all routers documented in Phase 1. Configure Multi-area OSPF on Routers (,,, and Belfast). Configure a summary (type 3) for area 1. Configure a Default on Belfast and redistribute the route into the OSPF process. Configure MD5 authentication between OSPF routers across all WAN links Adjust the Hello timer to 40 sec and Dead timers to 160 sec on the link between and Verify that the, Belfast,, and routers have connectivity through Layers 1-7. Provide the ability of the network to dynamically recover from the failure of a device acting as a default gateway to. Use first-hop redundancy protocol () to provide the mechanism. Capture and save the four router configuration files. Edit the text files, and include comments at the top of each file documenting the following: Your name The date CCNA4 Case Study Phase 2 This documentation will serve as the deliverable item for Phase 2. Copyright ~ 2003, Cisco Systems, Inc. Case Study: WANs 5-9
Phase 3: Configuring s 209.1.1.1/32 10.0.0.3/29 10.0.0.1/29 Belfast s Use the following instructions to complete Phase 3: 1. Apply the basic switch configuration - Hostname and passwords - STP (PVST +) - VTP Server () 2. Configure the Belfast s LAN (2 routers and 3 switches) as follows: Create and name three Data s and one Management - 99: Management (Native) - 2: HR - 3: R&D - 4: Production. Configure ports as trunks (802.1Q) on and Configure switches, and ; assign: - FastEthernet ports 1-4 as trunks (802.1Q) - Configure when appropriate. Configure access layer switch ; assign: - Port 6 to 99 - Ports 7-10 to 2 - Ports 11-14 to 3 - Ports 14-20 to 4 - Disable all unused ports Connect of the Belfast s 2 routers to of and Connect one workstation per. This documentation will serve as the deliverable item for Phase 3 6-6 CCNA 3, R & S: Scaling Network Cisco Systems, Inc.
Phase 4: Configuring ACLs 209.1.1.1/32 10.0.0.3/29 10.0.0.1/29 Belfast s Use the following instructions to complete Phase 4: 1. Configure a Reflexive ACL On the Belfast Router. The ACL should: Allow IP traffic for TCP and ICMP sessions originating from the inside (established sessions) while denying IP traffic for sessions originating outside the network. 2. Use an ACL to control VTY access on the router only. The ACL should: Allow telnet session to the router from the Management ( 99) only; telnet from other networks should be denied Document the ACL configuration a chart. This will serve as the deliverable item for Phase 4. Copyright ~ 2003, Cisco Systems, Inc. Case Study: WANs 7-9
Phase 5: Configuring DHCP 209.1.1.1/32 10.0.0.3/29 10.0.0.1/29 Belfast s DHCP Services DHCP should provide services to the following LANs hosts: Belfast s 2, 3 and 4 DHCP should pass the following parameters to the hosts: IP address and Subnet Mask Default Gateway DNS address (10.0.0.4) The router will perform the DHCP services. Configure using the DHCP pools documented in Phase 1. Configure DHCP services on the router as follows: s sub-interfaces with the first useable address. Exclude the first 10 IP addresses from each pool (to be used for printers and servers) Configure Workstations to obtain its IP address automatically. Have one host connected to Fa0/0 on and one host per connected to s 2-4 on the Belfast s access layer switch. Recapture and save the router configuration file. Edit the text file, and include comments. This documentation will serve as the deliverable item for Phase 5 F 12-8 CCNA 4: WAN Technologies v3.1 Copyright ~ 2003, Cisco Systems, Inc.
Phase 6: NAT Server 209.1.1.1/32 209.1.1.1/30 10.0.0.3/29 10.0.0.1/29 Belfast s Use the following instructions to complete Phase 6: 1. The Belfast s (2) routers will perform NAT. Configure the routers as follows: Define the NAT pool. The pool consists of public network address. Exclude first 10 addresses from this pool (to be use for servers, when required). Define an access control list, which will translate for all internal () addresses, and deny all other traffic. Establish dynamic source translation, specifying the NAT pool and the ACL defined in the previous steps. Specify the inside and the outside NAT interfaces. Change the default NAT timeout value to 120 seconds. Document NAT configuration in a chart; it will serve as the deliverable item for Phase 6. 2. Connect a Server to the s port to simulate an server. Configure this Server as follows: Configure the IP address and subnet mask as 209.1.1.2/8. Configure the default gateway to be 209.1.1.1. 3. Configure the server to act as a web server. enable a simple web page that will tell users that they have reached the. Recapture and save the Belfast s routers configuration file. Edit the text file, and include comments. This documentation will serve as the deliverable item for Phase 6 12-9 CCNA 4: WAN Technologies v3.1 Copyright ~ 2003, Cisco Systems, Inc.
Phase 7: Verification and Testing 209.1.1.1/32 10.0.0.3/29 10.0.0.1/29 Belfast s LAN 400 hosts 172.16.0.0/21 Use the following instructions to complete Phase 7: 1. Verify communication Frame between various hosts Internet in the network. Troubleshoot (Use a PC to and fix any Relay problems in the network until simulate it works properly. Document the 10.0.0.2/30) results of the tests in a table. Galaway 2. Recapture and save the router configuration files for all four routers. Edit the RIP text V2 files, and include comments at the top of each file documenting the Fa0/0 following: 10.0.0.1/30 Your name The date CCNA4 Case Study Final Router Configuration Belfast PPP Link Fa0/0 The router name that Fa0/1 CHAPcorresponds to each file. 2 3 4 99 PPP Link PAP This documentation, along with the completed tables from Phase 1, Phase 2, Phase 3, Phase4, Phase 5, Phase 6, and Phase 7, will serve as the final deliverable item for the case study. Belfast LAN 20 hosts s Fa0/0 LAN 200 hosts 12-10 CCNA 4: WAN Technologies v3.1 Copyright ~ 2003, Cisco Systems, Inc.
Phase 8: Documentation & Presentation The final task in this case study is to deliver a 20 minutes presentation of the main features of the design decisions and recommendations. A formal written report should also be provided that contains all of the design documents as well as all the supporting worksheets (see the case study requirements; Overview and Objectives on page 1). The design documentation should include: device configurations, a list of the number and types of networking devices selected for this design, logical and physical diagrams, subnetting scheme, and network testing verifications. The completed tables from Phase 1, Phase 2, Phase 3, Phase 4, Phase 6, Phase 6, and Phase 7, should be included with the final deliverable items. The documentation should be complete and should contain enough information to allow a third party to properly install and configure or troubleshoot the network without requesting additional information. 12-11 CCNA 4: WAN Technologies v3.1 Copyright ~ 2003, Cisco Systems, Inc.