Cwna Guide to Wireless Lan

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CWNA Guide to Wireless LANs, Second Edition
Chapter Six
Planning and Deploying a Wireless LAN

Objectives
• • • • Explain the steps for planning a wireless network Tell how to design a wireless LAN Describe the steps in deploying a wireless network Explain the ways in which to provide user support

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Planning for a Wireless Network
• “If you fail to plan, then you plan to fail” • Some steps involved in planning wireless networks similar to planning wired network – Many steps significantly different

• Basic planning steps:
– Assessing needs – Weighing benefits – Calculating costs

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Assessing Needs: The Need for Mobility
• Two significant changes in business world over last 15 years: – Workers have electronic tools to access information and accomplish significantly more – Restructuring of organizational hierarchies • Organizations are “flatter” • Teamwork is essential

– Together, can result in decreased productivity
• Hinders ability to collaborate and make timely decisions

• “Mobile office” needed
CWNA Guide to Wireless LANs, Second Edition 4

Assessing Needs: The Need for Mobility (continued)
• A solution to need for mobility is WLANs
– Expand productivity zone of knowledge workers – Improve quality and productivity of meetings – Work can be performed in more locations at more times

• WLANs have been shown to add one to two hours a day of productive time per worker – Enabling worker to respond to customers, partners, and colleagues more quickly

• WLANs too often viewed as optional add-on to computer networks CWNA Guide to Wireless LANs, Second Edition 5

Assessing Needs: Examining the Business Entity
• Determine if business case exists for bringing wireless networking into corporate environment – What is the purpose or mission of the organization? – Is the current mission expected to change in the future? – What is the size of the organization? – How much growth is anticipated in the organization?

• Obtaining firm conceptual grip on organization as a whole and its current status will reveal if an investment in wireless technology is wise CWNA Guide to Wireless LANs, Second Edition 6

Assessing Needs: Reviewing the Current Network
• Question to ask when examining how organization uses current network: – How does current network support the organization’s mission? – What applications run on the network? – How many users does network support? – Strengths and weaknesses of the current network? – Anticipated growth in network technology?

• Examining current network status reveals much of this information – Especially applications and number of users
CWNA Guide to Wireless LANs, Second Edition 7

Assessing Needs: Reviewing the Current Network (continued)
• Good time to document network in detail:
– – – – – – – Number of clients Types of clients Number of servers The topology of the network What media is being used Performance of the network Types of devices connected to the network

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Assessing Needs: Reviewing the Current Network (continued)

Table 6-1: Current network table
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Assessing Needs: Reviewing the Current Network (continued)

Figure 6-1: Network diagram
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Determining Benefits: Hard Benefits
• Benefits that can be easily measured or quantified
– For WLANs, easily measured in decreased cost of installation • e.g., elimination of cabling costs

• Using wireless technology for MAN or WAN can result in even higher savings

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Determining Benefits: Soft Benefits
• Benefits that are difficult, if not impossible, to quantify accurately – – – – – Improved productivity Enhanced collaboration and faster responsiveness Flexible mobility Adherence to standards...
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