UniFi Alarm: AP Radar Detected

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sheldonlendrum

Sheldon
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#270059 21-Apr-2020 12:02

Hi team,

I have the Unifi CloudKEy Controller and a couple of Unifi AP.

https://www.gowifi.co.nz/wireless/uck-g2-plus.html

Recently I'm getting alerts "UniFi Alarm: AP Radar Detected"

Device name: (any one of the 4 AP Names)
Site: Home
Message: AP[80:2a:a8:50:be:b5] detected radar on channel 112 (5560 MHz)

I get an app notification and email for these, and some times get one every fre days, and sometimes I get 30-40 alerts in the space of half an hour.

Is it just picking up other AP's from neighbours houses, or something else?

Can I adjust a tolerance on these alert?

Thanks

Nate001

638 posts

Ultimate Geek

#2467006 21-Apr-2020 12:05

Its a DFS channel. You can't do anything about it other than selecting a channel out of DFS range.

michaelmurfy

meow
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#2467009 21-Apr-2020 12:10

Looks like you may be using DFS channels - with DFS, if an access point detects radar, it switches off the radio for a short time.

If you're running close to the latest UniFi software on your Cloudkey you can use WiFi AI to fix this - pop into your UniFi settings and go to Wi-Fi AI, first turn it on (if it isn't already) and adjust the schedule. I personally have it run weekly on a Sunday:

Scroll right down the bottom to Advanced and under Exclude 5GHz add the DFS channels:

Hit Apply and run a scan (you may have to wait a few hours for AI to learn your network if you didn't already have AI activated). It'll switch your access points to the best non-DFS channels for your location.

Michael Murphy | https://murfy.nz
Referral Links: Quic Broadband (use R122101E7CV7Q for free setup)

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sheldonlendrum

Sheldon
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#2467045 21-Apr-2020 12:57

Thanks guys.

I do have the Wifi AI option enabled, but have moved the scanning to weekly and excluded the DFS channels.

Thanks!

fearandloathing

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#2468321 23-Apr-2020 09:05

@michaelmurfy do you exclude channels under 2.4?

michaelmurfy

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#2468323 23-Apr-2020 09:07

fearandloathing:

@michaelmurfy do you exclude channels under 2.4?

Yes, everything except Channels 1, 6 and 11.

fearandloathing

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#2468388 23-Apr-2020 09:32

michaelmurfy:

Yes, everything except Channels 1, 6 and 11.

That's good to know, I was already doing that. But I had been looking for a solution for the DFS alerts. Your advice was timely. Thanks.

elpenguino

3419 posts

Uber Geek

#2468454 23-Apr-2020 10:43

Be aware that if you configure your settings to interfere with radar systems, spectrum management will come looking for you. And find you.

Radar operators are licensed for those frequencies so spectrum management will side with them.

So, my advice is to research which channels you're allowed to use in NZ because gear is made for world wide consumption where radar channels may or may not be in use.

Most of the posters in this thread are just like chimpanzees on MDMA, full of feelings of bonhomie, joy, and optimism. Fred99 8/4/21