Download - WLAN Validation 1 Motorola Public Document Classification, October 2011 MODULE 18 WLAN VALIDATION
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Motorola Public Document Classification, October 2011
MODULE 18
WLAN VALIDATION
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At the end of this module, you will be able to:
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Objectives
– Identify the four phases of WLAN validation– Distinguish between an active site survey and a passive site
survey– Describe site walkabout guidelines– Identify the prerequisites for a performance test– Identify the questions answered during a performance test
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Phases of Validation
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Phases of Validation - Overview
Site survey validation Performance testing Spectrum analysis (*) Security testing (*)
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Site Survey Validation
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Summary
Purpose Verify RF Characteristics meet QoS requirements of network design
Prerequisites AP’s are installed and operating
Validation site survey phases Passive LANPlanner / Site Scanner site survey (RF Monitoring)Active LANPlanner / Site Scanner site survey (AP performance)
Considerations A precise validation survey must combine active and passive site surveys
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Passive Site Survey Basics
• Survey instrument is a laptop or tablet– with LANPlanner/Site Scanner or an equivalent
survey tool• Survey instrument measures RF energy• Survey instrument generates no WLAN traffic
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Passive Site Survey Basics
1. Load site floor plans
2. Mark your starting point
3. Enable RF sensor
4. Walk and mark . . .
5. . . . walk halls, rooms, and open spaces
6. Insert reference points
7. Save survey data
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Walkabout Guidelines (1 of 3)
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Walkabout Guidelines (2 of 3)
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Walkabout Guidelines (3 of 3)
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Active Site Survey
• Measures both RF energy . . .• and a continuous data stream . . .• between an AP and the survey instrument
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Interpret Survey Results
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KEY GUIDELINE
Ensure that the survey tool sampling interval is greater than the AP beacon interval
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Performance Testing
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Summary
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Basics
• Requires both the wired and wired segments of the WLAN
• Requires connectivity to application servers and network resources
• Requires an instance of each client device type and model supported by the network
• Requires an instance of each end-user application supported by the network
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Initial Checklist
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Application Performance Test Checklist
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Roaming Performance Test Guidelines
• During a roaming test, duplicate the maximum roaming speeds users are likely to attain
• Use a packet trace tool during roaming tests, particularly for latency-sensitivereal-time applications
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Load Performance Testing
• Determine: Do applications meet QoS requirements when the WLAN is under a typical expected load?
• Recruit end users or an extended test team to simulate site usage scenarios
• Employ a centralized management system to monitor network and application performance
• Interview users to discover the perceived performance of individual applications
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WLAN Validation – Review
• Use appropriate tools (LANPlanner , SiteScanner, etc.) to validate RF performance
• Be sure to use “Walkabout Guidelines” to validate quality of RF performance
• Ensure site survey tool sampling interval is greater than the AP beaconing interval
• During roaming test, be sure to duplicate the maximum roaming speeds users are likely to use.
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Motorola Public Document Classification, October 2011MOTOROLA, MOTO, MOTOROLA SOLUTIONS and the Stylized M Logo are trademarks or registered trademarks of Motorola Trademark Holdings, LLC and are used under license. All other trademarks are the property of their respective owners. © 2011 Motorola Solutions, Inc. All rights reserved.
You should now be able to:
– Identify the four phases of WLAN validation– Distinguish between an active site survey and a passive site
survey– Describe site walkabout guidelines– Identify the prerequisites for a performance test– Identify the questions answered during a performance test
MODULE SUMMARY