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Wireless Networks for Schools - PowerPoint PPT Presentation

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Wireless Networks for Schools

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  1. Wireless Networks for Schools The Next Step NSW DET Standards

  2. Common Senario • Standard (“fat”) Access Point(s) (AP’s) installed • Multiple laptops connected • Security provided by WEP or WPA (or none) • More Access points added as wireless needs increases

  3. Wireless in Schools – Starting Point power outlet LAN outlet

  4. fibre-optic Backbone And it grows CPC Server Wireless Access Points Wireless Access Points

  5. What is wrong with this approach? • Access points are managed separately • Each AP must be configured individually • Access points do not talk to each other • Each AP works independent from others • Each AP must have security settings configured consistently • WEP or WPA Keys must match across all Aps • Channel Management • No adjacent cells on same channel • 1 – 5 – 11 • Rogue or interfering APs • Laptop Management • Laptops need security keys entered • School Laptops (Trusted) • Non School Laptops (Not Trusted) - Student and Staff

  6. What about Staff/student (Private) Laptops? • Secure Connection? • WEP/WPA keys • Some Laptops can not support WPA • Security Keys? • CC configures laptops? • Keys made pubic? • On Domain? • Logon Scripts • Group Policies • Workstation Management • Antivirus/Antispyware software installed or up to date? • You Touched it – You Broke it

  7. Limitations of (current) Wireless models • Bandwidth is shared by all connections • More connections – slower for all • Practical limitation – 15 connections • a/b/g is half duplex (cuts bandwidth in half) • b/g drops to speed of slowest connection • Distances • Environmental factors • Management overhead • Channel management • Rogue AP’s • Interfering AP’s

  8. Future Senarios • Can your school support Staff Laptops? • 50 + Laptops on site across whole site. • Can your school support Students bring in their own laptops • 500 + laptops on site across whole site? • Who will manage Security, Connection, Virus and Spyware software.

  9. Example 1 – Single building • To be covered: • 4 Classrooms

  10. Example 1 – Single building Minimal Coverage – 1 AP

  11. Example 1 – Single building Full Coverage – 8 AP’s

  12. Example 2 – Primary School • To be covered: • 10 Classrooms • Library • Office

  13. Example 2 – Primary School • Minimal Coverage: • 10 AP’s • 3 AirMonitors (AM’s)

  14. Example 2 – Primary School • Higher Coverage • 16 AP’s • 3 AM’s

  15. Example 3 – High School • To be covered: • All Classrooms – 4 x 2 Floor Buildings, 6 x Single Floor Buildings • Library • Office • Hall • Canteen / Covered Area

  16. Example 3 – High School • Higher Coverage • 26 AP’s • 3 AM’s

  17. Solution – Centrally Managed Wireless • All Access points managed via central controller • Access points self regulating • Channel • Signal Strength • Self Healing

  18. NSW DET Standards • Internal / Hot Spot Wireless • Aruba Networks Centralised Wireless • Aruba Access points • Wireless Controller • Inter-building Connections • Wireless Not recommended

  19. Aruba Networks • Centralised Management / Control of AP’s • Use of “Thin” AP’s + Management controllers • Access points powered through Power over Ethernet (POE)

  20. Aruba Centralised Wireless LAN

  21. Advantages of Aruba WLAN • “Zero Touch” Deployment of AP’s • Centralised management • Can be managed from Regional Office or onsite • RF Management • Automatically adjust channel and signal strength • Self Healing to correct AP failure • Client Load Balancing • Fast Roaming • Support for Voice, Video and Data • Non-disruptive integration into existing Wired Network • Identification and Cancelation of Rogue and Interfering AP’s (Requires Air Monitors) • Management software can identify location of any client computer (Requires 3 or more AP’s)

  22. Wireless Security • Can support trusted and non-trusted laptops • No touch approach for Non-Trusted Laptops

  23. Authentication • System can authenticate against: • Local LDAP/Radius Server using Active Directory (Windows) or Open LDAP (Mac) • Centralised Radius Server/ IDM • Edu.Win (Students) • Staff.Win (Staff) • Sydney.DET.WIN (Computers) – Resource Domain

  24. Sydney Region Recommendations