duke university deploying 802.11n pilot tammy closs bob johnson kevin miller
TRANSCRIPT
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Deploying 802.11n Pilot
Tammy ClossBob JohnsonKevin Miller
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Introducing Duke
• Research & teaching– Medicine, nursing, basic sciences, genomics, clinical
trials– Engineering– Social science, divinity– Environmental science– Law, Business, Public Policy
• Hospitals, clinics• Student life: athletics, residential life• Auxiliaries
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Metrics
• 5,500 undergraduate• 6,500 graduate• 8,000 faculty• 22,000 staff (incl. medicine)• 8,600 acres – 1,200 developed• 48,000 wired ports (excl. medicine)• 7TB+/day to/from Internet
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Campus Maps
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Backdrop for 802.11n
• Duke Digital Initiative– Inspired new uses for technology in academics
• Strategic Plan: Making a Difference– $1.3B over 5-8 yrs (2nd yr)
• Teaching & Learning Center– Classes as performances– Primary access: wireless or wired?
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Business Drivers
• Increase in wireless connectivity
• Decrease in wired use– Public wired ports
(library) completely unused
• Increased need for mobility
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Peak Simultaneous Wireless Users
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Current infrastructure
1700 APs
+800 APs – Res. Halls
11 WiSM
60% Coverage
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802.11n First look
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Pilot Environment
• Epworth Residence Hall– 16K S.F.– ~55 students, faculty-in-residence– Previously hotspot-only 802.11b/g
• Qty. 8 – AP1252 (2.4GHz + 5GHz)• Dedicated 4402 (code eval)• 3750G + 802.3at PoE injectors
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Intensive Testing
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Experiences
• 40%+ connecting with 802.11n– MacBook– Dell, Lenovo, others
• 129Mbps+ peak throughput (11n clients)• 802.11g client: 2x faster on 11n AP
compared to 11g AP– Especially pronounced at greater distances
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Next Steps
• Campus-wide 802.11n rollout over next 6-9 months– 1:1 swap of existing 802.11a/b/g APs– Completing wireless deployment in reshalls
• All new laptops to have 802.11n radios• Prioritizing locations
– Teaching and learning spaces– Greenfield opportunities (“New Campus”)
• Risk mitigation– 802.11n standard– PoE, GbE connectivity
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Financial Considerations
• Evaluation of funding approach for wired and wireless networks– Wireless installed with one-time
funds– Wired network: ongoing refresh
budget
• 802.11n upgrade: advancing planned 4 year refresh cycle
• Observation: wired network size decreases, yet cost per port will increase (GbE, 10GbE)
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Wireless Network - Expenses v. Size
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Future
• Experimenting with HDTV-over-WiFi• Preparing for phase-out of 802.11b– Legacy devices v. leading edge• Refresh issues with Auxiliaries (inventory, PoS)
• VoWiFi– Location, E911
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Questions
• Future of wired VoIP phones?• Future of wired ports?• Laptop backup on wireless network?• Gaming – suitable over wireless?• Multicast applications on wireless? (IPTV)• Wireless security & usability
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Contact Information
• Bob Johnson– [email protected]– +1 919 668 1762
• Kevin Miller– [email protected]– +1 919 668 6484