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New Member
Posts: 7
Registered: ‎05-13-2018

Why can my neighbours use DFS channels?

I have 3 AP in the house and it's soo annoying that I get kicked out of all the DFS channels I have tried. But I keep noticing at least to neighbours on channel 106 (center 80MHz). They look to be on those channels constantly. They both use the stock WiFi-router from our ISP and they are pretty good actually.

 

So, are they illegally stuck on 106 or are my APs too sensitive? Not easy to figure out without some proper equipment, I know. 

Senior Member
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Re: Why can my neighbours use DFS channels?

Hello @strips,

 

Why would you want to be on a DFS channel?

 

 

Regards,

Glenn R.

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Re: Why can my neighbours use DFS channels?

because sometimes you have too many ap's or interferance ?
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Re: Why can my neighbours use DFS channels?

[ Edited ]

Hello @audio-catalyst,

 

1 radar and you get kicked of the channel.

I personally would avoid DFS, only use it if really needed.

 


Regards,

Glenn R.

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Re: Why can my neighbours use DFS channels?

Depending on firmware (if I remember correct) you could get a lot of false positive DFS events. Can you please share your 'Show System Config' which can be found in the controller on the Settings, Maintentance tab?

Controller (5.10.22): CK 0.13.10
Unifi (4.0.21.9965 ): UAP-AC-IW-Pro, UAP-AC-LR, UAP-AC-M & USW8-60W (4.0.21.9965)

Better WiFi coverage is not achieved by increasing transmission power, but by increasing the number of accesspoints.
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Posts: 7
Registered: ‎05-13-2018

Re: Why can my neighbours use DFS channels?

Not too many 40Mhz channels are available. With 3 APs close enough to interfere with each other there is only 2 available. Forcing me to use at least one DFS-channel. 

New Member
Posts: 7
Registered: ‎05-13-2018

Re: Why can my neighbours use DFS channels?

Could not copy the system config with my phone. I'll post it tomorrow. I believe I got the latest firmware. 

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Re: Why can my neighbours use DFS channels?

Hello @strips,

 

You could use the following channels:

- 36

- 44

- 149

- 157

 

 

Regards,

Glenn R.

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Re: Why can my neighbours use DFS channels?

@AmazedMender16 unfortunatly I can only see non DFS channels below 52. Need to find what's actually legal in Norway.

New Member
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Registered: ‎05-13-2018

Re: Why can my neighbours use DFS channels?

Here is my system config.

 

APs
UAP-HD (1)
UAP-AC-Pro (2)
Version5.8.28
DPIEnabled
Conn MonitorEnabled
Cloud AccessEnabled
Current Site...
Networks
LAN
WAN
Wireless Networks
virus2
virus
Guest PortalDisabled
Authenticationnone
Expiration 
Landing Pageoriginal
Portal CustomizationDisabled

 

AC HD StueUAP-HD3.9.42.9152
5
HT20
 / Low (9 dBm)
46
48,-1
VHT40
 / High (23 dBm)
9 dBm (EIRP)23 dBm (EIRP)14Prefer 5G falsefalse  wire, 1,000 FDX192.168.1.16213d 23h 13m 24sSwitch Vaskerom #1
AC Pro LoftstueUAP-AC-Pro3.9.42.9152
10
HT20
 / Low (9 dBm)
54
56,-1
VHT40
 / High (20 dBm)
9 dBm (EIRP)20 dBm (EIRP)00Prefer 5G falsefalse  wire, 1,000 FDX192.168.1.1961d 18h 16m 50sSwitch Vaskerom #7
AC Pro VaskeromUAP-AC-Pro3.9.42.9152
1
HT20
 / High (20 dBm)
110
112,-1
VHT40
 / High (20 dBm)
20 dBm (EIRP)20 dBm (EIRP)01Prefer 5G falsefalse  wire, 1,000 FDX192.168.1.1642d 17h 54sSwitch Vaskerom #5
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Re: Why can my neighbours use DFS channels?

Hello @strips,

 

Could you upgrade your UAPs to 3.9.45?

Iknow it has nothing to do with your issues but I would recommend doing the following things.

 

Disable Uplink Connectivity Monitor

Settings > Site > Uplink Connectivity Monitor

 

Radio Settings:

 

2.4 GHz
Channel width: HT20
Chanel: 1/6/11 (Any of these, do a RF scan to get the most clear one)
Transmit Power: Low/Medium

 

5 GHz

You are allright on that, since you want to sit on DFS channels.

 

 

Regards,

Glenn R.

 

 

 

 

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Re: Why can my neighbours use DFS channels?

[ Edited ]

What's legal in Norway is the same as the rest of Europe (ETSI region).

 

DFS should be fine unless there is actually a local radar emitter causing alerts.

 

If there is then you have limited options :

1) Move the UAP such that the antennae gain pattern is going to be less affected;

2) Use sectoral antennae pointed away from radar emitters;

3) Reduce the bandwidth from 80 to 40/20MHz.

 

NB - you ARE allowing for the dwell time on DFS channels when you select them yes? That ranges from one minute to ten minutes depending on frequency. During that period the UAP will not accept connections on the 5GHz band as its listening for radar.

New Member
Posts: 7
Registered: ‎05-13-2018

Re: Why can my neighbours use DFS channels?

Thanks for the answers and I'm aware of most of the tuff you are talking about.

 

I really do not want to be on DFS channels. I just got to few regular channels for more than 20MHz bandwidth.

 

But back to my initial issue.

 

It's annoying my neighburs are constantly using DFS seemingly without getting kicked but they have other router/APs. Not Ubiquiti. So I'm starting to question if I get lots of false positives or they are illegaly using those channels.

 

I do have a few possible radar sources Man Sad

  1. 4 km east, shipping lane (Oslo fjord)
  2. 10 km south, wheather radar
  3. 11 km north, another wheather radar 
  4. 31 km north east, air control radar 

 

Coming to think of it I'm f...... I need to start mapping their alotted frequencies to see if I should be able to use anything at all on DFS.

New Member
Posts: 5
Registered: ‎03-21-2016
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Solutions: 1

Re: Why can my neighbours use DFS channels?

I suppose you could try one AP at VHT40 and two at VHT20. That yealds three channels without DFS.

 

Deploy the VHT40 one in the area with higher bandwidth requirement.

 

Man WinkFrode

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