is wi-fi ready for this?. high performance wi-fi for education: planning, deploying, and managing...
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Is Wi-Fi Ready for This?
High Performance Wi-Fi for Education:
Planning, Deploying, and Managing Wi-Fi in Campus Environments
© 2011 Xirrus, Inc. All Rights Reserved.
February 2011
Wi-Fi Technology
Radio Improvements
IEEE 802.11b 11Mbps 2.4GHz
802.11n150Mbps 2.4GHz600Mbps 5GHz
802.11acGigabit 1000Mbps5GHz
802.11a54Mbps 5GHz
802.11iSecurityTKIP +AES Encryption
Wi-Fi Engineering’s Goal Continues to be “Wireless Networking Better than Wired”
802.11g54Mbps 2.4GHz
802.11adMulti-Gig2000Mbps60GHz
20121999 2000 2001 2003 2004 2005 2007 2008 2009 2010 2011
MAC Improvements802.11eWi-Fi Quality of Service
802.11kRadioResouceMgmt
802.11vWirelessNetworkMgmt
802.11rFast Roaming
802.11wProtectedMgmtFrames
802.11afTVWhiteSpace
802.11uExternalNetworkInterface
802.11n –Draft150Mbps 2.4GHz600-Mbps 5GHz
802.11sMesh
Changing Role of Wi-Fi in Education
© 2011 Xirrus, Inc. All Rights Reserved.
“Wi-Fi will overtake Wired as the primary
network connection as evidenced by the
wave of new devices being introduced
without a Wired connectivity option”
Trends Impacting Wi-Fi in Education:• Capacity & Performance are key, coverage is a
given
• Proliferation of Wi-Fi Devices, you can’t stop them
• Higher bandwidth applications, will continue to grow
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Wi-Fi: Devices
“Client devices are increasingly being engineered with Wi-Fi as the only network
connection”
Desktops
Laptops
VoIP Phones
Notebooks
Wired
Wi-Fi
Smartphones
Netbooks
iPads
Tablets
© 2011 Xirrus, Inc. All Rights Reserved.
What are the Critical Success Factors?
Educational Wi-Fi: Reality
“Within 12-24 months, 60-80% of your users will rely upon
mobilized applications. They will use 3+ wireless devices over a cloud-based infrastructure to access these applications.”
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Wired
Wi-Fi
Wi-Fi: Applications
“Applications are mobilizing via the cloud and will increasingly be accessed over Wi-Fi”
Mainframe
Data-centric Client / Server
Data, Voice & VideoClient / Server Data &
Voice over Wi-Fi
Data, Voice & Video over Wi-Fi
Data overWi-Fi
Cloud-based Data, Voice &
Video
© 2011 Xirrus, Inc. All Rights Reserved.
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Performance
Security
ResiliencyManagement
SiteSurvey
Wi-Fi: Critical Success Factors
© 2011 Xirrus, Inc. All Rights Reserved.
Wi-Fi: Speeds
“802.11n speeds effectively put Wi-Fi on par with Wired”
Ethernet
FastEthernet
GigabitEthernet
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Wired
Wi-Fi
802.11b
802.11ag
802.11n
© 2011 Xirrus, Inc. All Rights Reserved.
Futures: 802.11ac, 11ac, 11af, …
“Taking advantage of Wired Lessons Learned is a best practice”
To Address Wi-Fi Performance Needs…
Best Practice:Since the late 70s Ethernet has continued to evolve, providing higher performance via a distributed architecture, higher density devices and leveraging all available media. It only makes sense for Wi-Fi to mirror these practices.
Distributed Intelligence
• Forwarding & Filtering at Edge
• No Single Point of Failure• No Processing choke point
Dense, Multi-state Ports
• Intelligent connectivity• Auto detect speed/band/channel• Supports client migration
2000
2010
Distributed Intelligence
Distributed Intelligence
2000
2010
10/100/1000 Mbps
11/54/300/450 Mbps
2000
2010
1000Base-T
IEEE 802.11n
4 pairs provide 1Gbps Media fully leveraged
3 channels of 2.4GHz = 450 Mbps
24 channels of 5GHz = 3.6 Gbps spectrum fully leveraged
Enterprise Best Practice
• Leverages all available medium
• Improve B/W across all medium
• Sufficient for network needs
© 2011 Xirrus, Inc. All Rights Reserved.
To Address Wi-Fi Security Needs…
“Doing your security due diligence is a best practice” Authentication
Authentication• Machine and/or User• 802.1x/MAC/WPR• Separate User Classes by
SSIDBest Practice:Whether called due diligence of just a best practice all enterprise networks providing client connectivity to critical applications require the ability to verify users, protect the communication channel and monitor the RF environment
Encryption
Encryption• WEP, WPA, WPA2• Distributed Processing• Separate User Classes by
SSID
IDS/IPS
IDS/IPS• 24/7 monitoring/mitigation• Integrated solution• RF analyzer to monitor
spectrum
To Address Wi-Fi Resiliency Needs…
Confidential Information. © 2010 Xirrus, In. All Rights Reserved. Page 12
Best Practice:Having end to end redundancy is always an Enterprise connectivity best practice. Wired solutions fell short at the edge and traditional Wi-Fi falls short at the core. Look for a solution offering reliability at all points in your network.
Edge• Multiple Radios/Channels• Load balancing across radios• Band /Mode Steering
Access Level• Distributed intelligence• Auto Cell Recovery• Auto Channel Services
Core• Redundant wired uplinks• Redundant WDS uplinks• 802.3ad link load balancing
“System level availability is a best practice”
To Address Wi-Fi Management Needs…
Confidential Information. © 2010 Xirrus, In. All Rights Reserved. Page 13
Best Practice:Management applications, no matter wired or wireless must have the ability to manage, monitor all networked devices and provide detailed reporting and statistical data for each device, or the network as a whole. Wireless adds the requirement to also monitor RF environment for interference or potential threats
Device Specific• Provisioning• Monitoring / alerting• Upgrading• Reporting
Enterprise Wide• Multiple SSID/User
Groups• Traffic limiting• Load balancing• Reporting
RF Environment• Threat Monitoring• Coverage Assurance• Interference Monitoring• Reporting
“System level management is a best practice”
To Address Wi-Fi Site Survey Needs…
Confidential Information. © 2010 Xirrus, In. All Rights Reserved. Page 14
Best Practice:At best, predictive surveys are a estimate, live site surveys take actual measurements using the same devices that will be deployed. This is the only way to guarantee coverage, # of devices and most importantly cost.
Coverage Verification• Active Measurements• Verifies real RF propagation• Visually inspect site
RF Analysis• RF Interference Check• Neighboring Wi-Fi• Potential Threats
Guarantee• Actual Product capabilities • Coverage/Performance• Product Numbers and cost
“Live site surveys are a best practice”
Performance
SecurityResiliency
ManagementSite
Survey
Final Thoughts: It’s Math, Not Marketing
© 2011 Xirrus, Inc. All Rights Reserved.
• More Radios, Separate Channels = More Bandwidth
• Channel Planning is key• 27 Available Wi-Fi Channels (3 in 2.4GHz, 24 in 5GHz)
• Avoid Co-Channel & Adjacent Channel Interference (spectral mask)
• Lowering radio power is seldom the answer
• Use Cognitive Systems (Multi-State, Multi-Mode, Multi-Channel …)
• Limit the number of SSIDs you define
• Clients, Clients, Clients, ….• Purchase multi-band devices
• Understand signal level requirements
• Consider return path signal levels
Wi-Fi: What is your plan?
No Question Yes
X Do you need to deploy Wi-Fi as a primary network connection somewhere on your campus during the next 2 years? √
X Do you need a Wi-Fi solution that will support all your educational and business applications, not just basic ‘Hot Spot’ services? √
XDo you need a Wi-Fi solution that can support major traffic spikes (flashtraffic) throughout your campus as students move and congregate?
√
X Do you need a Wi-Fi solution that can be deployed with a minimum of classroom disruption and operate with 99.999% reliability? √
XDo you want a guarantee for the Wi-Fi solution you purchase for one or all of the following: performance, capacity, or the cost of implementation?
√
© 2011 Xirrus, Inc. All Rights Reserved.
Is Wi-Fi Ready for This, YES!
Xirrus: Wi-Fi Array
“The Wi-Fi Array obsoletes traditional thin omni-directional Access Points and is the only 1-to-1 Wi-Fi
equivalent to a Wired Switch”• 2X the range
• 4X the coverage
• 8X more bandwidth
• 8X more users
• Multi-state radios
• Full line-rate encryption
• Integrated Threat Sensor
• Integrated Wi-Fi Firewall
• Radio resiliency
• Array resiliency
• Uplink resiliency
• Wi-Fi backhaul resiliency
© 2011 Xirrus, Inc. All Rights Reserved.
– Wi-Fi Posters– Deployment Examples– Design & Deployment Guide– Technical Resources
• White Papers• FAQs• Application Notes• And More
– Wi-Fi Inspector– Request a Survey
Additional Wi-Fi Resources: WWW.XIRRUS.COMAdditional Wi-Fi Resources: WWW.XIRRUS.COM
