Radar Signal

Santi70 · Fri Jan 26, 2024 11:17 pm

I have wifi configured this way

/interface wifi channel
add band=2ghz-ax comment="16 db" disabled=no frequency=2462 name=channel11x width=20mhz
add band=5ghz-ax comment="DFS 1 minuto, 30db" disabled=no frequency=5660,5220 name=channel132_46x width=20/40mhz
/interface wifi security
add authentication-types=wpa2-psk,wpa3-psk disabled=no ft=yes ft-over-ds=yes name=secWPA3 wps=disable
/interface wifi configuration
add channel=channel11x country=Spain disabled=no mode=ap name=cfg11x security=secWPA3 ssid=Magalis
add channel=channel132_46x country=Spain disabled=no mode=ap name=cfg134_46x security=secWPA3 ssid=Santi
/interface wifi
set [ find default-name=wifi1 ] comment=5GHz configuration=cfg134_46x configuration.mode=ap .tx-power=19 disabled=no
set [ find default-name=wifi2 ] comment=2.4GHz configuration=cfg11x configuration.mode=ap disabled=no mtu=1500

It turns out that after detecting a radar signal, the wifi went down and it didn't pick up again, however I have it on in addition to channel 5660 DFS, 5520 not DFS, why didn't it pick up on the second channel?

aradar.png

I only have that log related to wifi1 after the radar signal

aradar1.png

I saw this the next day, at no time did he get up according to the logs, How to make it lift at another frequency or at the same one after 1 minute?

Sat Jan 27, 2024 9:01 am

Set it manually to that frequency and see what error comes out, if any.
Since you're change tx power (why ?), I'm suspecting something is at play there.

Santi70 · Sat Jan 27, 2024 1:52 pm

The first time it only had the 5660 frequency, when it went down, it gave me an error, that it had no available frequencies and it didn't pick up more, so I added the 5220 non-DFS frequency to see if it used that one after the false radar signal , but this time it did not lift but it did not give any error.
When I realize the situation, I disable the interface and enable it again, after a minute it starts and spends a good amount of time like this..., up to a day.
What is the correct configuration so that when a radar signal appears I will not be left without the 5 Ghz signal?

Sat Jan 27, 2024 3:17 pm

Skip DFS ranges if you are in a problem zone.

But I prefer not to use auto selection. I always set frequencies manually after doing a scan of the installation area.
Then I know what is going to happen and I will not run into situations like you are seeing.

Santi70 · Sat Jan 27, 2024 4:16 pm

But when it finds a radar signal, the router doesn't select another channel automatically? That's what I thought.

Sat Jan 27, 2024 4:27 pm

It should but not when you only present it with an option which might not be valid either.

Have you already tried running that second frequency manually leaving all other settings untouched ?

ToTheFull · Sat Jan 27, 2024 4:51 pm

I also found giving second frequencys didn't quite work for me I know your only using 40 wide etc. So now I use...

/interface/wifi/actual-configuration/print              
 0 name="cap-wifi1" mac-address=48:A9 arp-timeout=auto radio-mac=48:A9 
   configuration.mode=ap .ssid="001" .country=United Kingdom 
   security.authentication-types=wpa2-psk .encryption=ccmp .passphrase="1234" 
   .management-protection=allowed .wps=disable .ft=yes .ft-over-ds=yes 
   channel.frequency=5500 .band=5ghz-ax .width=20/40/80mhz .skip-dfs-channels=10min-cac 

 1 name="cap-wifi2" mac-address=48:A9 arp-timeout=auto radio-mac=48:A9 
   configuration.mode=ap .ssid="001" .country=United Kingdom 
   security.authentication-types=wpa2-psk .encryption=ccmp .passphrase="1234" 
   .management-protection=allowed .wps=disable .ft=yes .ft-over-ds=yes 
   channel.frequency=2412 .band=2ghz-ax .width=20mhz .skip-dfs-channels=10min-cac 

 2 name="wifi1" l2mtu=1560 mac-address=18:FD arp-timeout=auto radio-mac=18:FD 
   configuration.mode=ap .ssid="002" .country=United Kingdom 
   security.authentication-types=wpa2-psk .encryption=ccmp .passphrase="4321" 
   .management-protection=allowed .wps=disable 
   channel.frequency=5180 .band=5ghz-ax .width=20/40/80mhz .skip-dfs-channels=10min-cac 

 3 name="wifi2" l2mtu=1560 mac-address=18:FD arp-timeout=auto radio-mac=18:FD
   configuration.mode=ap .ssid="001" .country=United Kingdom 
   security.authentication-types=wpa2-psk .encryption=ccmp .passphrase="1234" 
   .management-protection=allowed .wps=disable .ft=yes .ft-over-ds=yes 
   channel.frequency=2462 .band=2ghz-ax .width=20mhz .skip-dfs-channels=10min-cac

0,1,3 share sec1 security settings, and 2 uses a seperate SSID and it's own security settings because of the FT/Apple not connecting scenario

Santi70 · Sun Jan 28, 2024 11:15 am

Set it manually to that frequency and see what error comes out, if any.
Since you're change tx power (why ?), I'm suspecting something is at play there.

With the 5220 frequency it works, and I lower the power because I have another AP at home

Arun.png

Arun1.png

Arun2.png

Only that when frequency 5660 dropped it did not pick up at 5220 nor did it give an error, I discovered it when I saw that there was no one connected to the wifi1

Sun Jan 28, 2024 11:19 am

You don't need to lower TX power if the frequencies don't overlap.

Your environment looks relatively interference free.
Leave it on 5220 then, avoiding DFS ranges.

Santi70 · Sun Jan 28, 2024 2:22 pm

It's not free, I just filtered by SSID, only 5660 and up are free, everything is very saturated.
I reduce the power to make roaming faster
When it happens again I will send a supout file to mikrotik to see what they tell me

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