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The Next Generation Wireless

The Next Generation Wireless. Yuri Kolomiyets Network Services Information Systems and Technology. Current Wireless Network. Complete indoor coverage of campus Hardware: Avaya Access Points (Fat) 802.11g everywhere with data rates up to 54Mbps Management: Airwave Management Platform

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The Next Generation Wireless

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  1. The Next Generation Wireless Yuri Kolomiyets Network Services Information Systems and Technology

  2. Current Wireless Network • Complete indoor coverage of campus • Hardware: Avaya Access Points (Fat) • 802.11g everywhere with data rates up to 54Mbps • Management: Airwave Management Platform • Authentication: Network Authentication Appliance WatITis | Life After 50 | December 4, 2007 | The Next Generation Wireless

  3. Access Point management Airwave Management Platform • Allows to monitor, configure and manage access points • Has rogue detection capabilities • Collects statistics • Supports multiple vendors/platforms WatITis | Life After 50 | December 4, 2007 | The Next Generation Wireless

  4. Access Point management Problems with Airwave • Not 100% support of all features • Lots of false positives by Rogue Detection • Poor distributed management capabilities WatITis | Life After 50 | December 4, 2007 | The Next Generation Wireless

  5. Authentication Gateways Network Authentication Appliances (aka. NAAs) • Developed by Bruce Campbell <bruce@ist> • Gateways (routers) for wireless subnets • 3 in IST, 1 in ARTS, 2 in ENG, 1 in ARC • Run on FreeBSD • Control authentication, security and traffic shaping • Also used for wired access where required WatITis | Life After 50 | December 4, 2007 | The Next Generation Wireless

  6. Authentication Gateways Custom functionality • Captive portal authentication • Client-only firewall rules • TTTS (Toilet tank traffic shaping) • MinUWet • developed by Erick Engelke <erick@engmail> • Windows XP SP2 only • Failed health check results in access restrictions • Printing capabilities (in ENG) WatITis | Life After 50 | December 4, 2007 | The Next Generation Wireless

  7. Architecture Overview • Core • NAA • Constituency switch/router • Access points • Clients • AP management vlans • Client vlans trunked to NAA • Routed links • Management • Wireless WatITis | Life After 50 | December 4, 2007 | The Next Generation Wireless

  8. Problems with physical infrastructure • After initial survey no way to determine gaps in coverage • No dynamic power/channel adjustment • Poor load balancing • No physical layer security (Open access) WatITis | Life After 50 | December 4, 2007 | The Next Generation Wireless

  9. Problems with NAAs • Need to be inline with client traffic • Currently can only be done with VLAN trunking • Very complicated (messy) design • Not very scalable architecture • No redundancy • Inefficient use of IP address space • No synchronization between NAAs • No roaming • Buggy WatITis | Life After 50 | December 4, 2007 | The Next Generation Wireless

  10. Usage statistics WatITis | Life After 50 | December 4, 2007 | The Next Generation Wireless

  11. Next generation • RFP 07-53 awarded to Aruba • 3rd generation Architecture (Thin APs + controller) • Complete overall solution from a single vendor • Except health check • Built-in firewall • Application aware • Extensible WatITis | Life After 50 | December 4, 2007 | The Next Generation Wireless

  12. New Architecture • Aruba Wireless Controller • Aruba APs • No need for trunking • Wireless traffic tunnelled from AP to controller • Wired traffic goes through tunneller (wired AP) • NAA is replaced with Aruba WatITis | Life After 50 | December 4, 2007 | The Next Generation Wireless

  13. Aruba is #UNO !!!1 • More powerful access points • Automatic channel/power adjustment • Effective high density deployment • Full roaming capabilities (L2 and L3) • Rogue monitoring and mitigation • Uniform use of IP space with Vlan Pooling • NO BUGS !!!! WatITis | Life After 50 | December 4, 2007 | The Next Generation Wireless

  14. Deployment • Deployed 10 APs in MC • 645 to go • 3 controllers in N+1 redundant mode • Authentication will be moved to Aruba • Minimum change in appearance • Routing will be moved to HP • DHCP will move to NS1 and NS2 • minUWet to be implemented by Erick • TTTS to be implemented by Aruba or Erick WatITis | Life After 50 | December 4, 2007 | The Next Generation Wireless

  15. Aruba Interface WatITis | Life After 50 | December 4, 2007 | The Next Generation Wireless

  16. Future • Complete coverage in residences • Wired control for ResNet moving to Aruba • Outdoor coverage • 802.1x authentication • Guest provisioning • Remote APs WatITis | Life After 50 | December 4, 2007 | The Next Generation Wireless

  17. Questions?? • Thank you. WatITis | Life After 50 | December 4, 2007 | The Next Generation Wireless

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