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Managing a Next Generation Wireless Infrastructure Electrical Engineering and Computer Sciences UCB

Managing a Next Generation Wireless Infrastructure Electrical Engineering and Computer Sciences UCB. UCCSC Conference 2004. Early Adopters of First Generation WIFi. Testing Began Spring 2000 Production Roll Out September 2000 First Enterprise Scale WLAN on Berkeley Campus

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Managing a Next Generation Wireless Infrastructure Electrical Engineering and Computer Sciences UCB

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  1. Managing a Next Generation Wireless InfrastructureElectrical Engineering and Computer Sciences UCB UCCSC Conference 2004 Fred Archibald and Mike Bordua University of California Berkeley

  2. Early Adoptersof First Generation WIFi • Testing Began Spring 2000 • Production Roll Out September 2000 • First Enterprise Scale WLAN on Berkeley Campus • Based on Orinoco AP 1000 Platform Fred Archibald and Mike Bordua University of California Berkeley

  3. Early Goals • Provide Ubiquitous WLAN Coverage Within EECS • Support EECS Faculty, Grad Students & Staff • Provide Encryption • Provide Authentication • Provide Roaming Within EECS Dept. Fred Archibald and Mike Bordua University of California Berkeley

  4. Extremely Successful But Shortcomings Were Plenty • Interference and Noise • Rogues • Lots of Coverage But Low Performance • Difficulty in Locating Clients • Lack of Support For Undergrads • Difficulty in Supporting Guest Access • Lack Of True “Enterprise” Class Of Products • Security Fred Archibald and Mike Bordua University of California Berkeley

  5. Enter a New PlayerFall of 2002 What if You Could : • Address Interference And Noise by Assigning Channels Dynamically ? • Identify Rogues ? • Locate Clients to Aid in Troubleshooting ? • Support Multiple WLANs ? • Support Multiple Security Policies ? • Have Central Management ? Fred Archibald and Mike Bordua University of California Berkeley

  6. A New Model • A Switch Based Wireless Architecture • “Thin” Access Points • APs Directly Attached or Used in “Appliance Mode” • Three Ways to Power APs • Centralized Management With Better Security Fred Archibald and Mike Bordua University of California Berkeley

  7. Begin New WiFi Infrastructure Pilot • First Discussions in Fall 0f 2002 • Initial Deployment in Feb 2003 • Production Users in Fall of 2003 Fred Archibald and Mike Bordua University of California Berkeley

  8. Fred Archibald and Mike Bordua University of California Berkeley

  9. Addressing Shortcomings:Interference & Noise: • Dynamic Channel and Power Assignment • Rectifies the “Rubik’s Cube” Aspect of Assigning Radio Channels • Interference and Noise Avoidance Algorithms Fred Archibald and Mike Bordua University of California Berkeley

  10. Fred Archibald and Mike Bordua University of California Berkeley

  11. Addressing Shortcomings: Better Coverage • Cory Hall (111K sq ft, 5 floors + 2 Mezz.) • Soda Hall (59K sq ft), 7 floors • Deployment to Cover Local Cafés • HMMB (One lab) • BWRC (Off Campus) • Currently 80 Access Points in Production • All Are 802.11a/b/g Capable • 4 Switches • Coverage is currently approximately 98% Fred Archibald and Mike Bordua University of California Berkeley

  12. Addressing Shortcomings:Rogue Detection • Automatically Detect Rogues and Pinpoint Them • Can Also “Contain” Rogues By Preventing Clients From Associating With Them Fred Archibald and Mike Bordua University of California Berkeley

  13. Fred Archibald and Mike Bordua University of California Berkeley

  14. Fred Archibald and Mike Bordua University of California Berkeley

  15. Addressing Shortcomings Troubleshooting Clients: • Client Location by AP and Switch • Display of Client Location on Map • Display of Client movements • Display of Client State Fred Archibald and Mike Bordua University of California Berkeley

  16. Fred Archibald and Mike Bordua University of California Berkeley

  17. Fred Archibald and Mike Bordua University of California Berkeley

  18. Fred Archibald and Mike Bordua University of California Berkeley

  19. Addressing Shortcomings Undergrad and Guest Support: • Currently 4 WLANs Delivered Over Infrastructure • Very Granular Control by a/b/g and by AP • Each Can Have Different Encryption And Authentication Policy • Each Can Map to a Different VLAN or Same VLAN Fred Archibald and Mike Bordua University of California Berkeley

  20. Able to Add WLANs For Undergrad and Guest Support • Able to Remove “External APs” • Less Competition For Spectrum • Reduction in Interference • Able to Add WLANS For Research Proj. • 802.1x Fred Archibald and Mike Bordua University of California Berkeley

  21. WLANs IN EECSALL WLANs Force DHCP Fred Archibald and Mike Bordua University of California Berkeley

  22. Additional Features • L2 or L3 Operation • Remote WiFi Services • Ease of Deployment of Temporary WiFi • High Availability in “Appliance” Mode • Detection of Some DOS Attacks • QOS • NMS Provides a “Global “ View Fred Archibald and Mike Bordua University of California Berkeley

  23. Fred Archibald and Mike Bordua University of California Berkeley

  24. Challenges • Clients, Clients, Clients! • “Sticky Clients” • Power Save • Drivers • Encryption In a Heterogeneous Environment • WinXP Zero Config Utility • Intel Centrino • Interference and Noise Fred Archibald and Mike Bordua University of California Berkeley

  25. Futures • Better Encryption • RFID for WiFi • Voice • More Emphasis on 802.11a • MIMO Fred Archibald and Mike Bordua University of California Berkeley

  26. Questions ? Fred Archibald and Mike Bordua University of California Berkeley

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