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Planning a Network Upgrade

Planning a Network Upgrade. Working at a Small-to-Medium Business or ISP – Chapter 3. Objectives. Perform a customer site survey. Describe the importance of planning when beginning a network upgrade. Describe physical topology considerations when upgrading a network.

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Planning a Network Upgrade

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  1. Planning a Network Upgrade Working at a Small-to-Medium Business or ISP – Chapter 3

  2. Objectives • Perform a customer site survey. • Describe the importance of planning when beginning a network upgrade. • Describe physical topology considerations when upgrading a network. • Describe structured cabling. • Describe network configuration and interaction of network devices. • Describe other considerations when planning an upgrade.

  3. Documenting the Existing Network • Perform a site survey. • Investigate and document the physical layout of the premises.

  4. Documenting the Existing Network • Current information gathered during a site survey: • Number of users and types of equipment • Current Internet connectivity • Application requirements • Existing infrastructure • Physical layout

  5. Documenting the Existing Network • Planning information gathered during a site survey: • Projected growth • New services required • Security and privacy requirements • Reliability and uptime expected • Budget constraints

  6. Documenting the Existing Network • Physical topologies • Wired • Wireless • Logical topologies

  7. Documenting the Existing Network • Understand the relationship between the devices and the network, regardless of the physical cabling layout

  8. Documenting the Existing Network • Record information about the current network on a brief inventory sheet.

  9. Planning the Network Upgrade • Requirements Gathering • Selection and Design • Implementation • Operation • Review and Evaluation

  10. Planning the Network Upgrade • Physical environment • Wiring closets: MDF, IDF

  11. Planning the Network Upgrade • Cabling considerations: • User work areas • Telecommunications room • Backbone area • Distribution area

  12. Planning the Network Upgrade • Structured cabling • Cabling choices: STP, UTP, coaxial, fiber optic • Patch cables • Horizontal cabling • Vertical cabling • Backbone cabling • Cable management • Cable labeling

  13. Planning the Network Upgrade • Straight-through cables • Crossover cables • Console (rollover) cables • Serial cables

  14. Purchasing and Maintaining Equipment • Managed Service • In-House

  15. Purchasing and Maintaining Equipment • LAN switches provide connectivity within the local area networks.

  16. Purchasing and Maintaining Equipment • Routers interconnect local networks and are needed in a WAN environment.

  17. Purchasing and Maintaining Equipment • ISRs combine the functions of switches, routers, access points, and firewalls into the same device.

  18. Purchasing and Maintaining Equipment Factors for choosing a router: • Type of connectivity • Features available • Cost

  19. Purchasing and Maintaining Equipment • Design considerations: • Reliability • Availability • “5 9s of uptime” • Fault tolerance

  20. Purchasing and Maintaining Equipment • IP addressing plan: • IP address scheme • Network information

  21. Summary • A site survey including extensive documentation of both physical and logical network information must be performed before a network upgrade can be planned. • The five phases of a network upgrade include requirements gathering, selection and design, implementation, operation, and review and evaluation. • Structured cabling deals with the placement of cables, location of wiring closets, cable management, and electrical considerations. • Cost and expandability are important considerations when planning equipment upgrades.

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