I run CapsMan on my main router (RB4011 Wifi) and have 2 CapAC APs. RuterOS: v7.20.4
If i have controll channel Width 20Mhz every thing is Ok (but have low speed). if i change into 40 (turbo) i get “no supported channel”. can anyone tell my why if i set on each seperatly it works?
The channelwidth is determined by the extensionchannel. In your current config "eeCe" indicates 80MHz. The control channel should be left 20mhz. Hence the no supported channel message.
What speed do you have? Sure you are connected to the 5GHz radio?
Even if you'd have control-channel-width correctly set to 20mhz, the rest of RF settings (extension-channel=eeCe frequency=5180,5200,5220,5240) only come up with single valid 80MHz channel ... and that's the channel with nominal frequency 5220 (which, together with channel layout eeCe, makes channel number 42 and spans 5170MHz-5250MHz). Mind that there are WiFi clients which prefer/require channel layout Ceee ... your setup would translate to extension-channel=Ceee frequency=5180. Besides using layouts Ce(eeeee) makes extending channel widths easy, just add those e's to the right. Nominal frequency can remain the same if it was chosen wisely/luckily at the beginning.
BTW, in many cases, where stations are not in immediate vicinity of AP, difference between e.g. 40MHz channel and 80MHz channel might be negligible ... by making channel wider total Tx power gets spread over wider channel, making nominal Tx power lower. Which makes SINR lower ... and that might cause receiver to struggle which in turn makes transmitter to use more robust coding/modulation schemes with lower throughput (per megahertz). So at the end of the day, throughputs in medium signal strength conditions remain the same. Throughputs in very good signal (e.g. between 1m and 3m distance between AP and client) likely increase (but most of times doen't double) while throughputs at lower signal levels can drop and cell range also decreases.
And did you check the signal level and channel occupancy on WiFi client. It could be that there are other APs operating on same frequency set creating excessive interference ... Or, if signal level is too low (e.g. below -60dBm), it could be that AP is faulty.
I have tested it by disabling all my ap and only having one 5Ghz with auto frequency. it had only one client at that momemnt connected. signal strenght was around -30db.
Because of RB4011 i also have on all “wirelless” package installed.
Signal strength of -30dBm is a bit (too) high, is the test device very close to the radios?
In your current setup there is a chance that all CAP's will choose equal frequencies (or channel if you prefer) causing interference. That you can check. And, by making different configs and provision rules per radio, you can set fixed, non overlapping channels. By using the reselect-interval (AFAIK it is available in the old driver, I'm using the new driver for a long time already) you can let the radios scan periodically for better channels. Manually this can be triggered by performing a scan per radio.
Can you share the data rates of the test device? You can read them on the CAPsMAN.
In regards to your remark about wireless: though wireless driver is doing it's job for a long time, you can choose to switch to wifi-qcom-ac. Only disadvantage (apart from the little remaining storage) is that you will loose the 2.4GHz radio on the RB4011. And you have to do your config all over...