1 Wireless Update Byron Early & Chad Burnham University Technology Services January 12, 2006 @...
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Transcript of 1 Wireless Update Byron Early & Chad Burnham University Technology Services January 12, 2006 @...
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Wireless Update
Byron Early & Chad Burnham
University Technology Services
January 12, 2006 @ Westnet Meetings
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Overview of Topics
General Overview of Current Wireless Deployment at DU
Wireless Point-to-MultiPoint Backbone Links Upgrade
Wireless Management Software (Airwave)
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Expanding Wireless @ DU:
Most new laptops have built-in Wi-Fi 802.11a/b/g “Tri-Mode”
Student Survey Results: They want more “wireless hotspots” Several requests for wireless coverage
inside dorm rooms (currently 10/100 ports) Faculty/Departmental Requests:
Classroom Flexibility (indoors & outdoors) Conference/ Meeting Areas
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Expanding Wireless @ DU (cont.) Current Installed Base:
257 Access Points/ Bridges 54 wireless VLANs
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Upgrading APs from 802.11b to “g” @ DU
0
50
100
150
200
250
300
Total APs 802.11g 802.11b
257218
39
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Supporting Wireless Clients Devices Supported:
Windows XP Pro and Mac OS 10+ ONLY !
Wireless Radio Cards Supported:
Most are built-in now – “ALL” supported
NO ISSUES during Orientation
1200 new students, 99% laptops w/ built-in Wi-Fi
PDAs becoming VERY popular among DU community
Not officially supporting yet – Alpha Testing Mode
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Supporting Wireless Clients (cont.)PDA Connectivity Options
No VPN client provided by Cisco AnthaVPN (old Movian, recommended by
Cisco) Very Expensive ~ $90 per client
Built-in VPN (PPTP or L2TP over IPsec)
WebVPN: works on Pocket Internet Explorer 2003 ONLY
Not supported on PDAs running PalmOS
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Web VPN Client Limited application capability MUST stay within browser window (No
streaming, IM, etc.) SSL VPN Client (VPN 3000 Rev: 4.7.2)
Same functionality as VPN client!! Only supported under Windows 2000/XP IE, Netscape, Mozilla, and Firefox Active X Controls or Java Required
Supporting Wireless Clients (cont.)WEB VPN Update
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DU provides network access via wireless links to:
Several University Housing Buildings Most Greek Houses
Wireless Point to Multi-Point Backbone Links
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Wireless Point to Multi-Point Backbone Links (cont.)
Reason for Upgrading
Replace Legacy Equipment (Orinoco OR1100s) Originally installed to support only a few users
per house – NOW 99% of residents have laptops Performance Increase
Move backbone links to unlicensed “less crowded” air space (802.11a)
Increase the throughput (11Mbps to 54Mbps)
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Proxim MP-11a MP-11a: Lowest Cost Uplink Option
Others: Milliwave, Laser, etc. - $$!!
MP-11a Architecture Star Network Design (vs. Mesh)
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Proxim MP-11a (cont.)Benefits Uses a “polling” protocol (WORP) to share its
medium vs. 802.11’s CDMA/CA 48-54 Mbps with DDRS
Data rate adjusts dynamically based on signal strength value. This helps compensate for temporary link degradation (heavy snow/rain) maintaining connectivity BUT at lower data rates.
Separate data rates for each link One “slow leg” does NOT reduce the data rates
of the others
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BU – SU mutual authentication Prevents man-in-the middle attacks and
rogue SUs 128-bit AES between BSU and SU 802.1Q VLAN Support (256 Vlans/BU) Storm Thresholds (packets per second)
Protects against network overloading
Proxim MP-11a (cont.)
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Proxim MP-11a (cont.)
MP11a Versions: MP11 Base Unit (BU)
Supports up to 250 SUs MP11 Subscriber Unit (SU) MP11 Residential Subscriber Unit (RSU)
Up to 7 Mac-Addresses (clients) No PoE
Rugged and Non-Rugged Versions
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MP-11a NON-RUGGED
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MP-11a RUGGED
BU w/ external antenna
SU w/ built-in antenna
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Wireless NetworkManagement
Proxim dropped support of WiNMA (mgt. soft) They now recommend WaveLink
DU selected “Airwave” after looking @ several vendors, including WaveLink WaveLink was less expensive, but didn’t have key
features: RADIUS Integration Legacy Equipment Support Aid in RF troubleshooting and capacity planning Access via HTTP/S MP11a SUPPORT (as of Summer 2005)
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Airwave – Radius Integration
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Airwave – Radius Integration (cont.)
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Airwave – Capacity Planning
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Airwave – Capacity Planning (cont.)
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Rapids Rogue AP detection via fingerprinting A LOT of false positives since we turned it on.
Airwave Wireless Site Plan (AWSP) Drag and Drop APs into your floor plan AWSP displays RF coverage information What about furniture, bldg material, etc. ????
Visual RF Creates coverage maps of wireless networks Shows physical location of users in the
network and potential rogue access points.
Airwave – New Products
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QUESTIONS ????