© 2006 Cisco Systems, Inc. All rights reserved.Cisco PublicITE I Chapter 6 1 Prototyping the Campus Network Designing and Supporting Computer Networks – Chapter 7

© 2006 Cisco Systems, Inc. All rights reserved.Cisco PublicITE 1 Chapter 6 2 Objectives  Describe the purpose for and procedures to build a prototype of the network design  Create test plans to perform simulated or prototype test of important design elements  Perform proof-of-concept tests on LAN design elements  Identify risks and weaknesses in the design based on the proof-of-concept test conclusions

© 2006 Cisco Systems, Inc. All rights reserved.Cisco PublicITE 1 Chapter 6 3 Describe the Purpose for and Procedures to Build a Prototype of the Network Design  Prototype network: a separate network built to replicate only the portion of a network necessary to test particular functions or capabilities  Pilot network: using a portion of an existing network to test a new functionality or capability

© 2006 Cisco Systems, Inc. All rights reserved.Cisco PublicITE 1 Chapter 6 4 Describe the Purpose for and Procedures to Build a Prototype of the Network Design  Create a test plan before beginning the testing process  Create a test plan document containing descriptions of the design and topology, test procedures, and anticipated results

© 2006 Cisco Systems, Inc. All rights reserved.Cisco PublicITE 1 Chapter 6 5 Describe the Purpose for and Procedures to Build a Prototype of the Network Design Methods to verify that a design meets the identified business criteria:  Prototyping  Basic connectivity tests  Functionality testing  Checklists

© 2006 Cisco Systems, Inc. All rights reserved.Cisco PublicITE 1 Chapter 6 6 Describe the Purpose for and Procedures to Build a Prototype of the Network Design Tools and methods used to validate that the design is working as anticipated:  Cisco IOS commands  IP utilities and tools  Protocol analyzers  Network simulation tools

© 2006 Cisco Systems, Inc. All rights reserved.Cisco PublicITE 1 Chapter 6 7 Describe the Purpose for and Procedures to Build a Prototype of the Network Design Test the redundancy and resiliency of a specific network design:  Overcoming device and link failures  Redundant links  Load balancing

© 2006 Cisco Systems, Inc. All rights reserved.Cisco PublicITE 1 Chapter 6 8 Describe the Purpose for and Procedures to Build a Prototype of the Network Design  Identify what represents a risk or weakness in the design

© 2006 Cisco Systems, Inc. All rights reserved.Cisco PublicITE 1 Chapter 6 9 Prototype the Hierarchical Network, Routing Protocol, and IP Addressing Model Identify goals and requirements met by LAN design:  Testing the new design  Determining what needs to be tested

© 2006 Cisco Systems, Inc. All rights reserved.Cisco PublicITE 1 Chapter 6 10 Prototype the Hierarchical Network, Routing Protocol, and IP Addressing Model Create the test plan:  List test outcomes that support business goals  Provide a checklist of success criteria

© 2006 Cisco Systems, Inc. All rights reserved.Cisco PublicITE 1 Chapter 6 11 Prototype the Hierarchical Network, Routing Protocol, and IP Addressing Model  Develop methodologies for comparing devices and topologies

© 2006 Cisco Systems, Inc. All rights reserved.Cisco PublicITE 1 Chapter 6 12 Prototype the Hierarchical Network, Routing Protocol, and IP Addressing Model  Develop methodologies for validating the choice of routing protocol

© 2006 Cisco Systems, Inc. All rights reserved.Cisco PublicITE 1 Chapter 6 13 Prototype the Hierarchical Network, Routing Protocol, and IP Addressing Model  Apply and test an appropriate addressing scheme

© 2006 Cisco Systems, Inc. All rights reserved.Cisco PublicITE 1 Chapter 6 14 Prototype the Hierarchical Network, Routing Protocol, and IP Addressing Model Compare and analyze risks or weaknesses associated with choosing LAN devices, topologies, and addressing:  Lack of redundancy  Single ISP for Internet connectivity  Limited bandwidth areas  Limited fiber connectivity

© 2006 Cisco Systems, Inc. All rights reserved.Cisco PublicITE 1 Chapter 6 15 Prototype the Server Farm, Including Security and High Availability  Identify the business goals and technical requirements supporting server relocation to a data center including a server farm.

© 2006 Cisco Systems, Inc. All rights reserved.Cisco PublicITE 1 Chapter 6 16 Prototype the Server Farm, Including Security and High Availability  Create a success criteria checklist to support business goals and technical requirements for the server farm

© 2006 Cisco Systems, Inc. All rights reserved.Cisco PublicITE 1 Chapter 6 17 Prototype the Server Farm, Including Security and High Availability Develop methodologies for comparing devices and topologies:  Creating a baseline  LAN simulation with specific protocols (PVRST+)

© 2006 Cisco Systems, Inc. All rights reserved.Cisco PublicITE 1 Chapter 6 18 Prototype the Server Farm, Including Security and High Availability Prototype the server farm, validating security and availability:  Availability requirements  Multilayer security  Firewalls  ACL design

© 2006 Cisco Systems, Inc. All rights reserved.Cisco PublicITE 1 Chapter 6 19 Prototype the Server Farm, Including Security and High Availability  Build and analyze the prototype of the LAN to ensure business goals and technical requirements have been met

© 2006 Cisco Systems, Inc. All rights reserved.Cisco PublicITE 1 Chapter 6 20 Prototype the Server Farm, Including Security and High Availability  Compare and analyze the risks or weaknesses associated with choosing server farm devices, topologies, and addressing

© 2006 Cisco Systems, Inc. All rights reserved.Cisco PublicITE 1 Chapter 6 21 Summary  The decision to create a prototype or pilot network depends on the type of testing required and the potential disruption to the existing network.  Before beginning any testing, a test plan should be developed.  Prototypes and simulations can be used to identify risks and areas of weakness in the network design.

© 2006 Cisco Systems, Inc. All rights reserved.Cisco PublicITE 1 Chapter 6 22