Cisco’s CleanAir Spectrum Analysis Offers Outstanding RF Visibility

Aug 12th, 2010 | By technologynews | Category: Technology
Cisco’s CleanAir Spectrum Analysis Offers Outstanding RF Visibility
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Cisco CleanAirbased on the networking giant’s newest Aironet3500 series
access points and the 7.0 version of the Unified Wireless Network softwareprovides
outstanding RF visibility combined with reporting, tracking and assessment
tools that help wireless administrators build stable wireless networks ready to
host mission-critical systems and applications.

For providing a premium and distinct solution (even at a premium price) in
an increasingly commoditized marketplace trending toward lower prices and
similar feature sets, Cisco and CleanAir earn eWEEK’s Analyst’s

With many wireless LAN vendors now
touting spectrum analysis detection features, Cisco stands alone as the only
vendor providing that capability via integrated, purpose-built hardware.
Leveraging its 2007 acquisition of Cognio, Cisco added a customized chip set to
the new Aironet 3500 series AP (access points) that works in concert with the
standard WiFi implementation to provide reporting, assessment and actions based
on visibility into raw spectrum energy and WiFi-related sources.

I tested CleanAir using six Aironet 3502i dual-band 802.11n access points
deployed throughout eWEEK’s San Francisco
offices, connected to a 5508 WLC (Wireless
Controller) running version 7.0.98 of its Unified Wireless Network software. To
the testbed, I added a Cisco WCS (Wireless
Control System) installed on a Windows XP-based laptop and a 3300 series MSE
(Mobility Services Engine).

Prices for the 3500 series Aironet APs start at $1095 each for the 2.4
GHz-only 3501i with internal antennae, and go up to $1495 for the dual-band
3502e with external antenna connectors. Our 3502i is right in the middle
at $1295 apiece.  According to Cisco representatives, a network that
comprises 250 Aironet APs, a single 5508 WLC,
WCS software and wireless-management
licenses, and a 3300 MSE with Context Aware licenses would cost $414,225 when
using Aironet 3502i APs.

Aironet 3500 APs and a 2100, 4400 or 5500 series WLC
with 7.0 software are the only required elements for CleanAir. The MSE and WCS
are optional, but they do add mapping, systemwide air-quality data aggregation
and storage, and an analysis of historical data that are not otherwise

CleanAir APs generate a couple of distinct pieces of information that are
transmitted to the WLC to provide the RF
perspective. The first, the IDR
(Interference Device Report), generates a unique device identifier for detected
interferers, while reporting the interferer classification along with affected
radio band and channel. The IDR also reports
an interferer’s severity index, based on its relative transmit power and its
duty cycle.

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