Getting it Right First Time Round: Things to Consider When Building or Upgrading WLANs


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What are the essential things you need to consider when looking to build a wireless network? Whether you work in a primary school or the world’s tallest building, needs are not so different - reliability, ease of operation, security and flexibility. So why do so many organisations get it wrong first time around? This presentation will look at the essential things to know about planning or building a wireless LAN. From the physics of RF management to the decision to perhaps place an access point the size of a dustbin lid above someone’s desk, there are numerous considerations when deploying a wireless LAN that have real impact on deployment and use.

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Getting it Right First Time Round: Things to Consider When Building or Upgrading WLANs

  1. 1. Roger Hockaday Getting It Right - First Time Upgrading or building wireless LANsCONFIDENTIAL© Copyright 2011. Aruba Networks, Inc. People move. Networks must follow.™All rights reserved
  2. 2. Who Is Aruba? Quick Facts Industry Recognition : ARUN Gartner $396M revenue FY11 2010 WLAN MQ Technology Leader 1000+ Employees 15,500+ customers $396.5 $400 $350 Revenue $300 up 49% YOY $266.5 $250 $199.3 $68M+ net Growth $200 $178.3 1500+ new $150 $127.5 income customers in $100 Q4FY11 $234M+ cash $72.5 $50 $0 $1.1 FY 2004 $12.0 FY 2005 FY 2006 FY 2007 FY 2008 FY 2009 FY 2010 FY 2011 with no debt Copyright © Gartner, Inc. "Magic Quadrant for Wireless LAN Infrastructure, 2009" by Michael J. King and Timothy Zimmerman, 12 February 2009 . The Magic Quadrant is copyrighted 2009 by Gartner, Inc. and is reused with permission. The Magic Quadrant is a graphical representation of a marketplace at and for a specific time period. It depicts Gartner’s analysis of how certain vendors measure against criteria for that marketplace, as defined by Gartner. Gartner does not endorse any vendor, product or service depicted in the Magic Quadrant, and does not advise technology users to select only those vendors placed in the “Leaders” quadrant. The Magic Quadrant is intended solely as a research tool, and is not meant to be a specific guide to action. Gartner disclaims all warranties, express or implied, with respect to this research, including any warranties of merchantability or fitness for a particular purpose. CONFIDENTIAL © Copyright 2011. Aruba Networks, Inc.2 All rights reserved
  3. 3. Trusted by Enterprises Worldwide • Every major social networking company • More than 500 major retail chains • 6 out of 8 Ivy League Schools • 3 of the world’s largest software companies • 30 of the world’s largest stadiums • The most widely deployed Wi-Fi by the U.S. military CONFIDENTIAL © Copyright 2011. Aruba Networks, Inc.3 All rights reserved
  4. 4. Which Device?  Single device per user  Many devices per user  Data only traffic  Data + Voice + Video  Single device type  Many device types CONFIDENTIAL © Copyright 2011. Aruba Networks, Inc.4 All rights reserved
  5. 5. Which Application? Multimedia • Custom enterprise multimedia apps • > 50% of employees adopting video Collaboration • Social Business: Jive, Chatter, Yammer • Connections: Lync, Telepresence, Facetime Virtual Desktops • Virtual Desktops:45M installations by 2013 • Citrix XenDesktop, VMware View CONFIDENTIAL © Copyright 2011. Aruba Networks, Inc.5 All rights reserved
  6. 6. What Policy? Manager Manager Manager Manager Manager 1 2 3 4 5 • Disparate networks • Siloed services VLAN VLAN VLAN VLAN VLAN • Built for 100 200 300 400 500 client-server WIRELESS WIRED VPN REMOTE OUTDOOR • No single OFFICE view of users or devices • No context awareness “Failure to put a comprehensive mobility strategy in place typically leads to higher cost, lower security, silo-ed solutions, and unnecessary duplication of services.” — Gartner, July 2010 CONFIDENTIAL © Copyright 2011. Aruba Networks, Inc.6 All rights reserved
  7. 7. Recognise the New Connectivity Paradigm • 4 Ports per User • Desktop, IP Phone Network Cost per User • 2 Ports per User • Overlay Wi-Fi • Laptop, IP Phone • 1 Port per User • Pervasive Wi-Fi • Tablet, Smartphone Over- Network Mobility- Engineered Rightsizing Centric 2001 2009 2011+ CONFIDENTIAL © Copyright 2011. Aruba Networks, Inc.7 All rights reserved
  8. 8. Design for Capacity not Coverage CONFIDENTIAL © Copyright 2011. Aruba Networks, Inc.8 All rights reserved
  9. 9. Manage the Air Channel 1 Channel 6  Fair distribution of clients Channel 11 across channels eg. 1, 6, 11  Fair distribution of clients across bands eg. 2.4-GHz and 5-GHz  Fair distribution of airtime per radio eg. Laptop vs Macbook CONFIDENTIAL © Copyright 2011. Aruba Networks, Inc.9 All rights reserved
  10. 10. The Importance of Spectrum Analysis  Integrated into every access point and always on, always available  Record and playback for effective diagnostics  Remotely viewable CONFIDENTIAL © Copyright 2011. Aruba Networks, Inc.10 All rights reserved
  11. 11. Role, Device, Application Based Access Role-Based SSID-Based Access Control Access Rights Staff Access Control Windows user iPad user Contractors Blackberry Voice HR Video Secure Tunnel Guest To DMZ Captive Portal Guest  Auto-identification  Each device, user,  Highly scalable, of user, device, application, secure and simple application CONFIDENTIAL © Copyright 2011. Aruba Networks, Inc. receives QoS to manage11 All rights reserved
  12. 12. Tarpit: Security without disruption  Single infrastructure without dedicated radios  Monitor all bands in 5Mhz Intervals  Avoid wasting airtime CONFIDENTIAL © Copyright 2011. Aruba Networks, Inc.12 All rights reserved
  13. 13. Flexibility is Key  Outdoor  Hotspot / 3rd Party  Campus  Small office with routers  Home office small office without infrastructure CONFIDENTIAL © Copyright 2011. Aruba Networks, Inc.13 All rights reserved
  14. 14. CONFIDENTIAL© Copyright 2011. Aruba Networks, Inc.All rights reserved
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