Problems with hapac2 5ghz wifi is flapping

RouterOS Beginner Basics
1

Hello, I bought a hapac2 and a capac.
I provisioned the wifi with capsman. The capsman running on hapac2.
I had no problems for 2 weeks, but for a few days I noticed that my wifi was unstable.
Yesterday I saw with a wifi scanner that the 5ghz wifi always goes on and off from the hapac2.
After switching off the 5ghz wifi, I have no problems.

I installed 6.46.6 on the hapac2 and capac.
Are there any problems with the 5ghz wifi on the hapac2 or do I possibly have a defective device?

best regards,

Sven

2

Sounds like a DFS (radar detection) in action. Check your logs to check if that is the case.

3

Is it possible in RouterOS to exclude such DFS channels?

4

Frequency 5180, 5200, 5220 and 5240 ( channel 36,40, 44 and 48).

5

Used to be done with the “channels” list. I still use this to avoid channel 120-124-128.(10 minute DFS wait)

Now a general disable is added in RouterOS. (First via CLI, later GUI). This limits the number of channels considerably.

See release notes for version number.

LT 6.45.9 : *) wireless - added “skip-dfs-channels” parameter;
Stable: 6.46.5: *) wireless - added “skip-dfs-channels” parameter;
Test 6.47rc2: *) winbox - added “skip-dfs-channels” parameter to wireless interface menu;
Test 6.47: *) wireless - added “skip-dfs-channels” parameter;

6

Sorry for delay, i have today enable the 5ghz wifi on hapac2. The hapac2 use channel 40 and capac use channel 56 both with 80mhz.

The 5Ghz Wifi from the hapac2 is currently stable.
I will watch it and wait when it becomes unstable again.
In the log I have no more messages from that day.

7

The hAP ac2 is not using DFS channels. I hope it is smart enough to us eCee on channel 40 as the non-DFS channels are 36-40-44-48 (36 is lowest channel possible)
The cAP ac is using DFS channels if it is smart enough to use eCee on channel 56 as the 4 possible channels are 52-56-60-64 (next channel is 100, so 64 is highest here)

If anything else is used (40/Ceee, 56/eeCe, 56/eeeC) then both 80 MHz channels will overlap.
XXXX is not defined, so I don’t know what it will choose.

8

When you say flapping, does that mean totally random?
Works fine for days and then will cut out for 10 min or 30 min… rinse cycle repeat??