Gathering Network Requirements - pearsoncmg.com

1 CHAPTER 2 Gathering Network RequirementsObjectivesUpon completion of this chapter, you should be able to answer the following questions:nWhat occurs during the six phases of thePPDIOO model?nWhat is the proper way to respond to a Requestfor Proposal or Request for Quote?nWhat are the roles of a Network partner team?nHow are business goals prioritized to determinetechnical Requirements for a Network upgradeproject?nHow do constraints affect the design of a Network ?Key TermsThis chapter uses the following key terms. You can find the definitions in the case page 50availability page 51reliabilitypage 51security page 51scalability page 51manageability page 51 PPDIOO page 51 Request For Proposal (RFP) page 53 Request For Quote (RFQ) page 53system-level acceptance testingpage 55network baseline page 56 Network Management System (NMS) page 70 Simple Network Management Protocol version 3(SNMPv3) page 70 Management Information Base (MIB) page 72 In this chapter you are introduced to StadiumCompany, a sports facility management company thatmanages a stadium located outside of a major city.

2 StadiumCompany needs to upgrade its existingcomputer Network to provide state-of-the-art services. To do this, StadiumCompany management outlinesa three-phase project. In the first phase, StadiumCompany is contracting with NetworkingCompany, alocal cisco business partner, to prepare a Network design Requirements document. In the second phase,the stadium management plans to issue a contract for the detail Network design. After the design iscompleted, the final phase will be the installation and implementation of the Network is also in the process of negotiating a contract with FilmCompany, a film productioncompany located in the nearby major city. FilmCompany will be responsible for producing, filming,and delivering high-quality video for download from the stadium website. StadiumCompany managementis also requiring FilmCompany to produce live video displays during the sporting events and concertsheld at the the progress of NetworkingCompany as it helps both StadiumCompany and FilmCompanyplan and design their Network StadiumCompany story demonstrates concepts in the main text, media, and PacketTracer (PT)activities.

3 The FilmCompany story provides context for the corresponding student practice in thehands-on you job-shadow the NetworkingCompany team, you will learn the skills needed to plan and design the StadiumCompany Network upgrades. Your new design skills enable you to support theNetworkingCompany team plan and design similar upgrades for the smaller FilmCompany design portfolio you create during this work assignment will enable you to develop and presentyour Network upgrade proposal to the FilmCompany management general, the StadiumCompany design project is used in the main text, media, and PT activities. The FilmCompany design project is completed in the hands-on labs. The StadiumCompany story (seeAppendix B) and the FilmCompany story (see Appendix C) are located in the appendixes and on theaccompanying cisco Lifecycle ServicesThe world of networking is evolving.

4 Networking is no longer just about connecting computers. Networkinghas become intelligent and plays a vital role in helping to improve business performance. Businessesare eager to expand their networks. Taking advantage of advances in technology, companies can addnew services and increase Lifecycle Services is designed to support evolving networks. cisco Lifecycle Services is a six-phaseapproach. Each phase defines the activities required to successfully deploy and operate cisco also details how to optimize performance throughout the lifecycle of a six phases of the cisco Lifecycle Services are as follows:nThe Prepare phase:The Prepare phase involves establishing the organizational Requirements ,developing a Network strategy, and proposing a high-level conceptual architecture identifyingtechnologies that can best support the architecture.

5 The Prepare phase can establish a financialjustification for Network strategy by assessing the business casefor the proposed Plan phase: The Plan phase involves identifying initial Network Requirements based ongoals,facilities, user needs, and so on. This phase involves characterizing sites and assessing anyexisting networks. It also includes performing a gap analysis to determine whether the existingsystem infrastructure,sites,and operational environment are able to support the proposed and Supporting Computer Networks, CCNA Discovery Learning GuideA project plan is useful to help manage the tasks, responsibilities, critical milestones, andresources required to implement changes to the Network . The project plan should align with thescope, cost, and resource parameters established in the original business Design phase: The initial Requirements that were derived in the Plan phase drive the activitiesof the Network design specialists.

6 The Network design specification is a comprehensive, detaileddesign that meets current business and technical Requirements . It incorporates specifications tosupport availability, reliability,security,scalability, and manageability. The design specificationis the basis for the implementation Implement phase: After the design has been approved, implementation (and verification)begins. The Network is built, or additional components are incorporated, according to the designspecifications. The goal is to integrate devices without disrupting the existing Network or creatingpoints of Operate phase: Operation is the final test of the appropriateness of the design. The Operatephase involves maintaining Network health through day-to-day operations, including maintaininghigh availability and reducing expenses.

7 The fault detection, correction, and performance monitoringthat occur in daily operations provide initial data for the Optimize Optimize phase: The Optimize phase involves proactive management of the Network . Thegoal of proactive management is to identify and resolve issues before they affect the fault detection and correction (troubleshooting) is needed when proactive managementcannot predict and mitigate failures. In the PPDIOO process, the Optimize phase may prompt arecommendation for Network redesign. Redesign may be necessary if too many Network problemsand errors arise, if performance does not meet expectations, or if new applications are identifiedto support organizational and technical process is often referredto as PPDIOO,based on the first letters of each of the six Study: Sports Stadium NetworkThe management organization of a stadium is working with the NetworkingCompany to renovate andupdate the stadium Network .

8 Over the years, the stadium Network has grown. However, little thoughtwas given to overall business goals and infrastructure design. Some new projects went forward. Butthe Network administrators did not have a realistic understanding of the bandwidth, traffic prioritiza-tion, and other Requirements needed to support such an advanced and business-critical Network . Thestadium management now wants to add new high-tech features, but the existing Network is not capableof supporting representatives meet with the stadium management to discuss the process theyintend to use to design the new Network . Although the Design phase is only one of the phases in thenetwork lifecycle, all of the PPDIOO phases impact the design the Prepare and Plan phases, the Network designer and stadium staff identify the business goals andtechnical Requirements of the stadium organization as well as any design constraints.

9 The requirementsgathering that occurs during these phases influences the decisions made during the Design Implement phase begins after the approval of the design. It includes the initial integration of thenew design into the existing the Operate and Optimize phases, the stadium personnel analyze and monitor the 2: Gathering Network Requirements51 The Network Lifecycle Prepare Phase During the Prepare phase, the stadium management and NetworkingCompany staff define the followingbusiness goals:nImprove customer experiencenReduce costsnAdd additional servicesnSupport company expansionThese goals provide a foundation for a business case. The business case is used to justify the financialinvestment required to implement the technology change. The company considers possible businessconstraints, including budget, personnel, company policies, and schedule five business case components are as of the ProjectnHow the project meets company business goalsnMain benefits and risksnSuccess AnalysisnOptions to meet business goalsnNonfinancial OptionsnSources required for services (outside vendors, Network installation companies)nPurchasing and funding sources (internal and external)

10 For whole project at once or over aperiod of ManagementnProject plan and rolesnTimelinenMajor risks and plan to minimize impactnEmergency plans if project not accomplishednSkills and personnel requirementsAfter the business case is accepted, the NetworkingCompany staff assists in the development of thehigh-level technology strategy and strategy identifies the following:nAdvanced technologies that support the new Network solutionnCurrent and planned Network applications and services, and their priorities based on business goalsnPeople, processes, and tools required to support the operations and management of the technologysolution52 Designing and Supporting Computer Networks, CCNA Discovery Learning GuideThe Prepare phase is typically done before a company issues a Request For Proposal (RFP)orRequest For Quote (RFQ).