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© 2011 Cisco and/or its affiliates. All rights reserved. This document is Cisco Public Information. 
Page 4 of 5 
Q. 
What’s needed to implement Cisco AnyConnect
®
 on the Cisco ASA 5520 Adaptive Security Appliance? 
A.   For additional details on the AnyConnect client, please visit: 
. 
Q.  What is the minimum WLC software level needed to support Cisco Aironet 3500 Series Access Points 
with Cisco CleanAir technology? 
A.  The 3500 Series with CleanAir technology is supported on all current controllers that use Cisco WLC Software 
Release 7.0 or later. What varies is the number of access points each WLC can support. For instance, the 
2100 controller can support 3 to 6 access points whereas the 5500 can support up to 500 access points. 
Q.  Is there a trial version of CleanAir available for download? 
A.  Cisco CleanAir technology requires Cisco Aironet 3500 Series Access Point in addition to the latest Cisco 
WLC Software (Release 7.x) on your latest controller. CleanAir is not a software package. It is available only 
as part of the 3500 Series access point hardware. 
Q. 
Can you talk about channel utilization in regard to throughput? I’ve heard that channel utilization at 
around 30 percent (from interference, or other clients) can render the network useless. Are there any 
general guidelines about this? 
A.  Generally, as you approach 60 percent channel loading, the capacity to sustain Wi-Fi goes away. 
Q. 
Is there going to be a “how to” on Cisco.com regarding iPad/iPhone enterprise deployments like 
802.1x for windows clients? 
A.  See this white paper: 
. 
Q.  Does 802.11b degrade 802.11a? 
A.  No. 802.11b operates at 2.4 GHz. 802.11a operates at 5 GHz. 
Q.  Do you require a dedicated access point to run CleanAir? 
A.  No, the Cisco Aironet 3500 Series Access Point operates in both local data mode and monitor mode 
Q.  Is the Cisco Mobility Services Engine (MSE) required to use any of the CleanAir features? 
A.  MSE is not required to use CleanAir technology. The MSE extends the presentation layer to CleanAir (seeing 
your zone of impact, history playback, and so on). 
Q.  How many 3500 Series Access Points would I need to take advantage of CleanAir? I already have ten 
1142 access points. Could I add one to that group to take advantage of the capabilities of CleanAir or 
would I need more? 
A.  You can either operate in dedicated mode with pervasive 3500 Series access points or monitoring mode, 
generally aiming for a 1:5 ratio. As an overlay to an existing 1140 installation, for instance, CleanAir would be 
set up in monitoring mode only. You would not be able to react to interference across the access points. We 
thus recommend a pervasive Cisco Aironet 3500 Series with CleanAir deployment to take full advantage of RF 
interference mitigation. 
Q.  What platforms are currently supported by Cisco AnyConnect? 
A.  Please refer to the Cisco AnyConnect data sheet for a list of supported platforms at: 
.