Presentation on theme: "Chapter 3: Planning a Network Upgrade"— Presentation transcript:
1 Chapter 3: Planning a Network Upgrade CCNA Discovery 2
2 Contents 3.1: Document the Network 3.2: Planning Site SurveyPhysical and Logical TopologiesNetwork Requirements3.2: PlanningPhysical EnvironmentCablingStructured Cabling3.3: Purchasing and MaintainingSelecting LAN devicesSelecting Internetworking DevicesUpgrades
3 Network UpgradeWhen expanding an existing network, if a business adds network hardware devices of varying quality and manufacturers, the quality of the current network may become degradedIt is important to carefully plan a network upgrade to ensure optimal performance and network scalabilityBefore designing an upgrade, a site survey is created to document the existing network structure.It is also necessary to investigate and document the physical layout of the premises to determine where new equipment can be installed
4 Site surveyA site survey provides the network designer important information and creates a proper starting point for the project.It shows what is already on site, and gives a good indication as to what is neededIt Should Include:Number of users and types of equipmentInternet service and equipmentExisting infrastructureSecurity requirementsApplication requirementsPhysical layout
6 topologies Physical topology Logical topology Shows the actual physical location of cables, computers, and other peripheralsWired: consists of the wiring closet and the wiring to the individual end-user stationsWireless: consists of the wiring closet and an access pointLogical topologyDocuments the path that data takes through the network and where network functions, like routing, occur.Includes the naming and Layer 3 addressing of end stations, router gateways, and other network devicesindicates the location of routing, network address translation, and firewall filtering
9 Logical Topology types StarEach device is connected via a single connection to a central point. The central point is typically a switch or a wireless access point.if a single connecting device fails, only that device is affected.If the central device, such as the switch, fails, then all connecting devices lose connectivity.Extended StarThe central device in one star is connected to a central device of another star, such as when multiple switches are interconnected, or daisy-chained together.MeshEvery device has a connection to every other deviceFully redundant network, complex to configurePartial MeshEach device is connected to at least two other devicesCreates redundancy but less complexMost core layer networks are wired as Mesh or Partial Mesh to ensure connectivity
11 Inventory sheetsAn inventory sheet is used to help the network designer determine what new equipment is requiredHelps obtain additional information about the hosts and networking devices that are currently installedshould also document any growth that the company anticipates in the near future.
12 Inventory sheet The inventory sheet includes: Device name Date of purchaseWarranty informationLocationBrand and modelOperating systemLogical addressing informationGatewayMethod of connectivityVirus CheckerSecurity information
13 Network upgrade planA good project plan helps identify any strengths, weaknesses, opportunities, or threats (SWOT)StrengthsWeaknessesOpportunitiesthreatsThe plan clearly defines the tasks, and the order in which the tasks are to be completed.
14 Planning Phases Requirements Gathering Selection and Design of Cabling and EquipmentDevices and cabling are selected based on the requirements outlined in an Analysis ReportMultiple design options are created and regularly shared with other members on the project.Prototypes are created and testedImplementation of NetworkCreating an implementation schedule that allows time for unexpected events, keeps disruption for the customer to a minimumOperation of networkThe network is brought into service in what is called a production environmentReview and EvaluationCompare user experience with goalsCompare the projected designs and costs with the actual deploymentMonitor the operation and record changes
18 Structured cabling Cabling choices: Patch cables: Horizontal cable STPUTPfiber opticPatch cables:a Short cable from the computer to the wall plate in the user work areaHorizontal cableCable from the wall plate to the IDF in the distribution areaVertical cableCable from the IDF to the MDF in the backbone area of the businessBackbone cablenetwork cable that handles the major traffic
23 Floor plan Identify these items: Patch cable Horizontal cable Vertical cableBackbone cableLocation of wiring closetArea to concentrate the end-user cables to the hub or switchCable management systemTrays and straps used to guide and protect cable runsCable labelling systemLabelling system or scheme to identify cablesElectrical considerationsOutlets and other items to support the electrical requirements of the network equipment
24 Purchasing Equipment Managed service In-house The equipment is obtained from the ISP through a lease or some other agreement, and the ISP is responsible for updating and maintaining the equipment.In-houseThe customer purchases the equipment, and the customer is responsible for the updates, warranties, and maintenance of the equipment.
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