Wireless Internet. Wireless. Michele Norin, CIO Tom Magrini, Assistant Director

Transcription

1 Accelerating Wireless Internet and Voice over Wireless Michele Norin, CIO Tom Magrini, Assistant Director

2 2008, Michele Norin & Tom Magrini. This work is the intellectual property of the authors. Permission is granted for this material to be shared for non-commercial, educational purposes, provided that this copyright statement appears on the reproduced materials and notice is given that the copying is by permission of the authors. To disseminate otherwise or to republish requires written permission from the authors. All other images are the copyright and/or trademark of the respective owners. CLICK TO ADD YOUR TITLE. 2

3 Challenges, Funding & History 3

4 Challenges Meeting Student Expectations 4

5 Challenges Developed Network Master Plan Lack of a single, ubiquitous system Departmental wireless networks Multiple login IDs Lack of security Spotty coverage Growing dissatisfaction by students Funding Early estimates in the range of $6M "The students t have wanted wireless Internet t for years. It's been a frustration ti for students," said Erin Hertzog, UA student body president. 5

6 Student Technology Fee Approved by the Arizona Board of Regents Student Technology Fee March 2006 Implementation Proposal April 2006 ($7M) Students began to pay the fee in Fall 2006 $65 $50 targeted for wireless $15 for the library 6

7 An Internal Loan Accelerates the Project $4.5M loan Arranged by UA Senior VP for Business Affairs Student Technology Fee proceeds to pay the loan 4 years Accelerated the implementation schedule Project started t on May 1,

8 An Aggressive Project Schedule May 1, 2006 NEC Unified Solutions started the wireless site survey 12M square feet July 2006 Installation began NEC project managed 3 cabling subcontractors Sturgeon, INS, & Netsian August 2006 First Access Points (APs) on the air Student Unions & Libraries 8

9 Student Wireless Access Survey Locations - Where would you like to use UA wireless? The libraries, Mall, and Student Unions will all have wireless access. Where do you want to see UA wireless extend to next?

10 The Next Project Phases By the end of Spring Semester M square feet were covered Average usage (end of Spring semester 2007): ~1,700 concurrent users Summer 2007 Phase 2 22 residence halls and & 9 additional buildings Total of 7M square feet 80 buildings plus the College of Medicine, Phoenix, UA South, & the Tech Park Average usage: ~5, concurrent users Over 19,000 unique clients seen 10

11 Cisco Case Study

12 Technical Design, Lessons Learned, & Futures 12

13 Most of the places students want wireless are available TODAY!

14 Predictive Site Survey - Ekahau

15 UAWiFi Architecture & Design Cisco LWAPP 6 x Catalyst 6509s 24xWiSM 6 x FWM 2 x WCS 1 x WCS Navigator 2 x 4404 WLC 1 x x ACS 2 x CCA 2 x Mobility Groups 3560 switches & injectors 4,703 APs WCS Navigator WCS WLAN MGMT WCS System WLAN MGMT System Lightweight Access Points 1131AG WiSM (Controller) UA L3 Network 1242AG

16 UAWiFi Architecture & Design 3 Service Set Identifiers (SSID) WPA2 with AES or WPA with TKIP Enterprise Requires NetID Authenticates ti t to AD synch d to NetID Captive Portal authentication, no encryption Sponsored guests of the UA Captive portal, port & rate limited, & no encryption For devices unable to support WPA2/WPA 16

17 UAGuest Captive Portal

18 UAPublic Captive Portal

19 VoFi (or VoWLAN) Voice over Wireless - UAVoIP Nokia dual-mode phones T-Mobile GSM & SCCP (Cisco CallManager) Cisco 7921 T-Mobile@Home (UMA) Currently supported through UAPublic SSID 19

20 Lessons Learned (1 of 4) Plan Predictive survey Allowed us to finalize total AP count Critical to understanding funding requirements Surveys were used by installers to pull cable and mount APs Student Survey Helped determine needs & prioritize buildings 20

21 Lessons Learned (2 of 4) Design SSIDs, WLAN chassis, & WCS Identified product scalability limitations Mobility groups Test WiSMs per chassis WCS architecture Numerous client driver/card issues identified Workarounds documented & published Windows Zero Config / Intel Issue 21

22 Lessons Learned (3 of 4) Client side support was the most challenging part of the implementation Intel issues with the 2200, 2915, & 3945 Intel & Cisco engineers on site Workaround identified Issue eventually resolved Apple Leopard Lots of driver issues Nokia phones Help Desk User Support Documentation for users 22

23 Lessons Learned (4 of 4) Tune the wireless network postinstallation Crucial for VoFi support Predictive survey only got us so far g is too hot in some areas Interference due to lack of channels Still lots of rogue APs a looks better More channels, less interference & rogues Locking Cisco 7921 phones to a 23

24 Too Dense AP Coverage in 2.4 GHz band (802.11g)

25 Plans n pilot Continued VoFi testing UMA Phones Agito Networks for seamless roaming Requires CCM 6.x Rogue AP identification & transition to UAWiFi Combine UAGuest & UAPublic to one SSID Redesign of the WLAN 6509s with 4.2 upgrade UITS SSID Public Safety SSID Wireless support of vending machines 25

26 Questions? 26

27 Backup Slides 27

28 2.4 GHZ 7921 Signal propagation with human head 2450 MHz signal pattern opposite the side of the head 2450MHz signal pattern with the head

29 5GHz 7921 Signal propagation with human head 5250 MHz signal pattern opposite the side of the head 5250MHz signal pattern with the head

30 Ekahau Site Survey Tool (2 of 3)

31 Ekahau Site Survey Tool (3 of 3)

32 Building 94 Ekahau RSSI 32

33 Building 94 Ekahau SNR & Data Rate 33

34 34