As you can see, when detecting a radar signal, the interface crashes and never works again despite having another NO DFS channel nor does it show any errors.
This is not the first time it has happened to me, but other times I have forgotten to document it
SUP-144391
As you can see it does NOT work, TX POWER without value, STATE: selecting channel and does not show any error
However, in addition to channel 5660, it has 5220 as a secondary NO DFS channel.
For completeness…what RouterOS version are you running?
Are you expecting radar signal occurences?
I use version 7.13.5 (ax3), and those signals appear randomly, I would say once a month, I assume they are false signals, the other AP (ax2) also has a DFS channel and it did not go down and it is not very far away
Thanks for documenting and reporting the issue to Mikrotik. I have not experienced this behaviour myself - because I either don’t have radar events nor do I restrict the channel frequencies that tight. But I’ve seen several reports in different topics in the last weeks - and all describe this behaviour.
How does the router know it’s a radar? Presumably is it looking for something generating a valid carrier, but no WiFi structure (thereby excluding noise)? Or is it able to discern known genuine radar signals?
It doesn’t now, it’s just some heuristics inside the driver. False positives are possible and common.
I experienced false positives on the legacy wireless driver. The event of “enabling” wifi on one of my tablet devices caused a “radar detection” on AP.
You did not set the second frequency correctly
There are more ways to assign frequencies:
Examples of valid channel.frequency values:
2412
2412,2432,2472
5180-5240:20,5500-5580:20
https://help.mikrotik.com/docs/display/ROS/WiFi#WiFi-Channelproperties
You give the format of the terminal command, and the topikstarter uses winbox.
I have not been able to replicate his entry.
My configuration
# 2024-02-23 20:49:23 by RouterOS 7.13.5
# software id = BWTH-3DWQ
#
# model = C53UiG+5HPaxD2HPaxD
# serial number = XXXXXX
/interface wifi channel
add comment="2.4 GHz 20 db" disabled=no frequency=2462 name=2channel11x width=20mhz
add comment="5 GHz DFS 1 minuto, 30db" disabled=no frequency=5660,5220 name=5channel132_46x width=20/40mhz
add comment="5 GHz DFS 10 minuto, 30db" disabled=no frequency=5580,5180 name=5channel116_36x1 width=20/40mhz
/interface wifi security
add authentication-types=wpa2-psk,wpa3-psk disabled=no ft=yes ft-over-ds=yes name=secWPA2 wps=disable
/interface wifi configuration
add channel=2channel11x country=Spain disabled=no mode=ap name=cfg11x security=secWPA2 ssid=Mired
add channel=5channel132_46x country=Spain disabled=no mode=ap name=cfg132_46x security=secWPA2 ssid=Mired
add channel=5channel116_36x1 country=Spain disabled=no mode=ap name=cfg116_36x1 security=secWPA2 security.ft=yes .ft-over-ds=yes ssid=Mired
/interface wifi
add configuration=cfg116_36x1 configuration.mode=ap .tx-power=20 disabled=no name=hAP-ax2_5 radio-mac=48:A9:8A:4C:2A:28
set [ find default-name=wifi1 ] comment=5GHz configuration=cfg132_46x configuration.mode=ap .tx-power=20 disabled=no
set [ find default-name=wifi2 ] comment=2.4GHz configuration=cfg11x configuration.mode=ap disabled=no mtu=1500
/interface wifi capsman
set ca-certificate=auto certificate=auto enabled=yes interfaces=bridge package-path="" require-peer-certificate=yes upgrade-policy=none
/interface wifi provisioning
add action=create-enabled disabled=no master-configuration=cfg116_36x1 name-format=%I_5 radio-mac=48:A9:8A:4C:2A:28
