Wi-Fi = Untethered Education ntethered Education Wi-Fi = Untethered Education ntethered Education Wi-Fi ‘s Now Ready to Replace Ethernet at the Edge Wi-Fi ‘s Now Ready to Replace Ethernet at the Edge Paul Kersse Paul Kersse ® 2009 Xirrus, Inc. All Rights Reserved Paul.kersse@Xirrus.com Paul.kersse@Xirrus.com
IT and education have a long standing partnership which over just the last 5 years has enhanced educational services via distance learning, collaboration, multimedia, Computers on Wheels, One-to-One initiatives, digital libraries, etc. But you’ve seen nothing yet; the next 5 years will see an explosion in the use of not just digital services, but Web 2.0 and Peer to Peer instruction in the classroom. Which begs the question, in what classrooms, in what buildings and on whose schedule? Pervasive Wi-Fi eliminates these location restrictions and provides for campus-wide instruction.
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Wi-Fi = Untethered Educationntethered EducationWi-Fi = Untethered Educationntethered EducationWi-Fi ‘s Now Ready to Replace Ethernet at the EdgeWi-Fi ‘s Now Ready to Replace Ethernet at the Edge
802.11g (2003)Operates in 2.4GHz spectrumData Rates: 1, 2, 5.5, 11, 6, 9, 12, 18, 24, 36, 48, 54MbpsBackward compatible with 802.11b Backward compatible with 802.11b Available channels: 3 (162 Mbps)
802.11n (2008/9)Operates in 2.4GHz and 5GHz spectrum (backward compatible with 802.11a/b/g)
Backward compatible with 802.11b Available channels: 3 (162 Mbps)
802.11n (2008/9)Operates in 2.4GHz and 5GHz spectrum (backward compatible with 802.11a/b/g)
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p p ( p g)Data Rates: Up to 300Mbps today (600Mbps future)Available channels: 27 (4 Gbps)
p p ( p g)Data Rates: Up to 300Mbps today (600Mbps future)Available channels: 27 (4 Gbps)
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Evolution: Performance/CapacityEvolution: Performance/CapacityCapacity is based on Radios & Segmentation (just ask the cell guys)Capacity is based on Radios & Segmentation (just ask the cell guys)Capacity is based on Radios & Segmentation (just ask the cell guys)
Available Radios = Available Bandwidth
Capacity is based on Radios & Segmentation (just ask the cell guys)
Available Radios = Available BandwidthFirst Generation APs offered a single radioToday’s APs typically offer two (2.4 & 5 GHz)Some newer APs offer 3 or 4 radios
First Generation APs offered a single radioToday’s APs typically offer two (2.4 & 5 GHz)Some newer APs offer 3 or 4 radiosSome newer APs offer 3 or 4 radiosXirrus Arrays up to 16
Co erage/Cell Segmentation
Some newer APs offer 3 or 4 radiosXirrus Arrays up to 16
Co erage/Cell SegmentationCoverage/Cell SegmentationGreater capacity, density and less interferenceImproved RF management, coverage shaping, security
Coverage/Cell SegmentationGreater capacity, density and less interferenceImproved RF management, coverage shaping, securityReduces Multipath & Hidden Node issuesFewer devices to cover same areaReduces Multipath & Hidden Node issuesFewer devices to cover same area
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Evolution: SecurityEvolution: Security
Required Security FeaturesAuthentication – MAC/ 802.1x/Captive PortalsE ti WEP/TKIP/CCMP
Security EvolutionNo SecurityWEP (E ti /A th ti ti ) Encryption - WEP/TKIP/CCMP
Access Control Lists/FirewallsIDS/IPS/RF Monitoring
Evolution: Reliability/ResiliencyEvolution: Reliability/ResiliencyResidential Class APs (1st generation) – DisposableResidential Class APs (1st generation) – DisposableResidential Class APs (1 generation) – DisposableEnterprise Class APs – More reliable than Ethernet?
N t k R ili M lti l R di
Residential Class APs (1 generation) – DisposableEnterprise Class APs – More reliable than Ethernet?
N t k R ili M lti l R diNetwork Resiliency - Multiple RadiosMultiple Radios/Access Points/Arrays covering the same areaAt least three radios visible, -70dBm signal strength everywhere
Network Resiliency - Multiple RadiosMultiple Radios/Access Points/Arrays covering the same areaAt least three radios visible, -70dBm signal strength everywhere
End User Resiliency – Multiple PathsEthernet clients have single path to network (cables / switches)
End User Resiliency – Multiple PathsEthernet clients have single path to network (cables / switches)
Uplink/Backhaul Connections – Multiple LinksMultiple, load-balanced uplink connectionsM h B kh l M lti l R di
Uplink/Backhaul Connections – Multiple LinksMultiple, load-balanced uplink connectionsM h B kh l M lti l R di Mesh Backhaul: Multiple Radios
SurvivabilityEliminate SPOF Integrate intelligence in each AP
Mesh Backhaul: Multiple Radios
SurvivabilityEliminate SPOF Integrate intelligence in each AP
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Eliminate SPOF, Integrate intelligence in each APOverlapping coverage (Radios & Arrays)Auto Cell Size fills in any gaps
Eliminate SPOF, Integrate intelligence in each APOverlapping coverage (Radios & Arrays)Auto Cell Size fills in any gaps
Distributed = HIGHER PERFORMANCECentral Controller + Thin APs Packet Processing at edgeControl plane at edgePolicy and security enforcement at edge
Packet Processing at coreControl plane at corePolicy and security enforcement at core
Filters traffic before wired networkEncryption processing at edgePacket switching at edge, like Ethernet Greater scalability each device adds resources
Encryption processing at coreBack End Network Bottlenecks
11n will add 6x time the traffic loadCentral processing increase latency and jitter
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Greater scalability, each device adds resourcesCentral management
Central processing increase latency and jitter Central management
Wi-Fi offers over 30+ times the bandwidth of the early ‘hot spot’ technologyWi-Fi is less expensive to deploy than wired EthernetWi-Fi can seamlessly replace Ethernet to the desktop
Only Wi-Fi:
Supports Voice, Video, Data and Mobility services
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pp , , yProvides always on access from desk, meeting room, hallway, …Can reduce your IT staffs workload, users move themselves
® 2007 Xirrus, Inc. All Rights Reserved
Wi-Fi Technology – Best PracticesWi-Fi Technology – Best PracticesRecommendationsRecommendationsRecommendations
Demand Active ‘live’ surveysPredictive surveys are only a best guess
RecommendationsDemand Active ‘live’ surveys
Predictive surveys are only a best guess Live surveys guarantee performance
Transition to the 5GHz spectrum (802.11a now, 802.11n next) to achieve:8X increased capacity,
Live surveys guarantee performanceTransition to the 5GHz spectrum (802.11a now, 802.11n next) to achieve:
Client Devices Move away from 802.11b, it seriously degrades 802.11g/n performance
Significantly reduced interferenceClient Devices
Move away from 802.11b, it seriously degrades 802.11g/n performanceAt least buy 802.11a/b/g adapters Fold in new 802.11n clients (5GHz) for greater bandwidth
Wired Network InfrastructureP ll t l t Gi bit Eth t ti t h AP
At least buy 802.11a/b/g adapters Fold in new 802.11n clients (5GHz) for greater bandwidth
Wired Network InfrastructureP ll t l t Gi bit Eth t ti t h AP Pull at least one Gigabit Ethernet connection to each AP Confirm PoE capabilities to support 11n requirements
Wireless NetworkBuy infrastructure gear that is upgradeable
Pull at least one Gigabit Ethernet connection to each AP Confirm PoE capabilities to support 11n requirements
Wireless NetworkBuy infrastructure gear that is upgradeable
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Buy infrastructure gear that is upgradeablePerform switching at the edge, avoid ‘tromboningBuy infrastructure gear that is upgradeablePerform switching at the edge, avoid ‘tromboning
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High Performance Wi-Fi: Impact on EducationHigh Performance Wi-Fi: Impact on Education
1-to-1 initiatives hampered by today’s wireless infrastructuresOnline video training creating large strain on available wireless bandwidth 1-to-1 initiatives hampered by today’s wireless infrastructuresOnline video training creating large strain on available wireless bandwidth g g gEliminates costly and restrictive computer labsEnables the use of digital libraries
g g gEliminates costly and restrictive computer labsEnables the use of digital librariesCampus-wide Wi-Fi enables unrestricted instruction (Anywhere/Anytime)Enables the use of PODs (Personally Owned Devices) in the classroomP id th i f t t f W b 2 0 d P t P i t ti
Campus-wide Wi-Fi enables unrestricted instruction (Anywhere/Anytime)Enables the use of PODs (Personally Owned Devices) in the classroomP id th i f t t f W b 2 0 d P t P i t tiProvides the infrastructure for Web 2.0 and Peer to Peer instructionInstruction is no longer limited by building, classroom or IT schedulesProvides the infrastructure for Web 2.0 and Peer to Peer instructionInstruction is no longer limited by building, classroom or IT schedules
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Wi-Fi Funding: Actually Reduces CostsWi-Fi Funding: Actually Reduces CostsWi Fi deplo ments can act all red ce costs as the add fle ibilit
• Infrastructure Costs- Far fewer cable runs (savings of $100 $300 per cable run)
Wi-Fi deployments can actually reduce costs as they add flexibility.
- Far fewer cable runs (savings of $100-$300 per cable run)- Far fewer switch ports (savings of approx $215/switch port)- Far fewer devices to manage
• Eliminate traditional Moves/Adds/Change costs
• Significantly reduced time to install
• Reduce costs to Adding Remote Network Access- No trenching (parking lots, athletic fields, …)
• Allows last minute deployments as well as network portability
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p y p y
® 2007 Xirrus, Inc. All Rights Reserved Forsyth County Schools Serve over 35,000 students adding 2,000 new students each year
Forsyth County Schools Serve over 35,000 students adding 2,000 new students each year
All teachers have a notebook computer for online grading, reporting, and email. All computers within the Forsyth County schools are networked and have a high-speed connection to the Internet. The student to computer ratio is 2:1. Students produce live television broadcasts within their schools and work with equipment such as scanners, handheld computing units, and digital cameras Additionally parents can check their child's portfolios assignments grades and discipline online
All teachers have a notebook computer for online grading, reporting, and email. All computers within the Forsyth County schools are networked and have a high-speed connection to the Internet. The student to computer ratio is 2:1. Students produce live television broadcasts within their schools and work with equipment such as scanners, handheld computing units, and digital cameras Additionally parents can check their child's portfolios assignments grades and discipline online and digital cameras. Additionally, parents can check their child's portfolios, assignments, grades and discipline online.
Requirements Support hundreds of simultaneous connections in a given area
and digital cameras. Additionally, parents can check their child's portfolios, assignments, grades and discipline online.
Requirements Support hundreds of simultaneous connections in a given areaSupport hundreds of simultaneous connections in a given areaWireless support for wireless notebooks, handhelds, and phonesWireless bandwidth for voice, video, and data applications
Benefits
Support hundreds of simultaneous connections in a given areaWireless support for wireless notebooks, handhelds, and phonesWireless bandwidth for voice, video, and data applications
BenefitsSuperior range and coverage with 75% fewer devices and cable pullsBandwidth and performance for thousands of students, faculty, and staffAutomated management, RF spectrum, and security tools
Superior range and coverage with 75% fewer devices and cable pullsBandwidth and performance for thousands of students, faculty, and staffAutomated management, RF spectrum, and security tools
Saving vs. Traditional APsSuperior range and coverage with 8:1 reduction in devices and cable pullsNumber of additional access points that did not have to be installed - 3,500 (fewer devices to manage)Number of additional cable runs that did not have to be pulled 3 500 (savings of $700 000 $200/cable run)
Saving vs. Traditional APsSuperior range and coverage with 8:1 reduction in devices and cable pullsNumber of additional access points that did not have to be installed - 3,500 (fewer devices to manage)Number of additional cable runs that did not have to be pulled 3 500 (savings of $700 000 $200/cable run)
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Number of additional cable runs that did not have to be pulled - 3,500 (savings of $700,000 - $200/cable run)Number of switch ports that did not have to be consumed - 3,500 (savings $752,500 - $215/switch port)Power savings of 194,804 Kwh/year
Number of additional cable runs that did not have to be pulled - 3,500 (savings of $700,000 - $200/cable run)Number of switch ports that did not have to be consumed - 3,500 (savings $752,500 - $215/switch port)Power savings of 194,804 Kwh/year
Greater bandwidthHigher user densityEmbedded threat sensorsEmbedded threat sensors
Thi AP I t ll ti
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Thin AP Installation
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Learning from Cellular Phone Network Evolution Learning from Cellular Phone Network Evolution From the first commercial networks of the 1980’s to today…
Coverage expanded significantly
Capacity increased significantly
User densities explodedUser densities exploded
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® 2007 Xirrus, Inc. All Rights Reserved
Learning from Cellular Phone Network Evolution Learning from Cellular Phone Network Evolution From the first commercial networks of the 1980’s to today…
Coverage expanded significantly
Capacity increased significantly
User densities explodedUser densities exploded
To handle the growthTo handle the growth…Changed from omni to directional antennasI d di b t tiIncreased radios per base stationUtilized additional channels of spectrum
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Learning from Ethernet LAN EvolutionLearning from Ethernet LAN EvolutionEth tEth tEthernet
10X bandwidth boost every ~5 yearsShared evolved to switched
Ethernet10X bandwidth boost every ~5 yearsShared evolved to switchedIntelligence moved to the edgeIntelligence moved to the edge
L1 Hubs L2 Switching L3 Switching
n Gr
owth
L1 Hubs L2 Switching L3 Switching
1000Base-T
10Base-T Conn
ectio
n 100Base-T
1990 1995 2000 2005 2010
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Learning from Ethernet LAN EvolutionLearning from Ethernet LAN EvolutionEth tEth t Wi FiEthernet
10X bandwidth boost every ~5 yearsShared evolved to switched
Ethernet10X bandwidth boost every ~5 yearsShared evolved to switched
Wi-Fi~5X bandwidth boost every ~5 yearsShared architectures do not scale
Intelligence moved to the edgeIntelligence moved to the edge
Wi-Fi Array = More bandwidth Wi-Fi Array = More bandwidth
Wi-Fi ArrayMbpsMbps
Access Point
vs.
LanesLanes
4 times more bandwidth per deviceM di d l d i f d i 4 times more bandwidth per deviceM di d l d i f d i
APs CANNOT ACHIEVE THE SAME BANDWIDTH
More radios deployed using fewer devices Better performance for voice, video, and dataMore radios deployed using fewer devices Better performance for voice, video, and data
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APs CANNOT ACHIEVE THE SAME BANDWIDTH
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Wi-Fi Array = Support for more usersWi-Fi Array = Support for more users
Wi-Fi ArrayAccess Point
vs.
4 times more user density per deviceM t d i f d i 4 times more user density per deviceM t d i f d i
APs CANNOT ACHIEVE THE SAME DENSITY
More users supported using fewer devices Better user load balancing across all radiosMore users supported using fewer devices Better user load balancing across all radios
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APs CANNOT ACHIEVE THE SAME DENSITY
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Xirrus = Free professional servicesXirrus = Free professional services
Competition Xirrus
FREEvs.
FREE
Free site survey & security scanF i t ll ti lid ti & t i iFree installation, validation, & training5-year hardware & 90-day software warranties
Xirrus has the only implementation “guarantee” in the industry
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Xirrus has the only implementation “guarantee” in the industry