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WL0030 - WLC CleanAir (Part 2)

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The video goes in depth on ClearAir feature on Cisco Wireless LAN Controller. We will go through configuration of Cisco CleanAir and shows how interferences are detected by APs running Local and Monitor Mode, and Wireless Security Module. We will perform spectrum analysis using Cisco Spectrum Expert on SE Connect AP, and use it to observe system reaction to interference using wireless camera in the demonstration.
Part 2 of the video covers radio spectrum analysis with Cisco Spectrum Expert
  • CleanAir 2.4GHz and 5GHz
  • Persistent Interferers
  • Event Driven RRM (EDRRM)
  • Wireless Security Module (WSM)
  • Monitor Mode AP
  • Air Quality Index (AQI)
  • SE Connect Mode AP
  • Spectrum Expert
  • Spectrum Analysis

About Author

Metha Cheiwanichakorn, CCIE#23585 (RS, Sec, SP), is a Cisco networking enthusiast with years of experience in the industry. He is currently working as a consulting engineer for a Cisco partner. As a founder of and an instructor at, Metha enjoys learning and challenges himself with new Cisco technologies.


Hi Metha,
I have one question, regarding Cisco Spectrum expert setup.
I'm using WLC 9800-CL. I want to see what is going on on radio in one part of network, so I configure one AP C9120axi-E to be in Monitor mode. Cleanair is enabled on 2.4 and 5Ghz.

I'm connecting from lan PC to that AP via Cisco Spectrum Expert using AP IP and key.
Here I have two problems, don't know if you can help:

1. I don't see nothing in Active Devices- status is Waiting for devices....

2. I can connect using IP and Key of Access point only on b/g/n. When I want to connect to a/n using same IP ad key it says: Uneble to contact remote sensor. If I switch back to b/g/n connection is fine.

With b.g.n connection on dashboard Spectrum AQ i can see listed channels from 1 to 140.
I would say 5Ghz is covered but don't know why if i choose a/n to connect I;m not able to.

Can you please advice with any of my problems?

Many thanks,