CAPsMAN, 5-GHz, laptop gets disconnected

RouterOS Wireless Networking
1

Greetings,

I’ve 2 MikroTik devices, hAP ac (RBcAPGi-5acD2nD) & cAP ac (RBcAPGi-5acD2nD). CAPsMAN manager is running on hAP, managing cAP device.
I keep firmware & versions up-to-date, currently both are on 6.48.3.

There are two wireless networks managed by CAPsMAN -

channel: 2412/20-Ce/gn(27dBm), SSID: ***, CAPsMAN forwarding
channel: 5180/20-Ceee/ac(15dBm), SSID: ***-5GHz, CAPsMAN forwarding

A single Lenovo laptop (which I’m also keeping up-to-date in terms of drivers/software etc), when connected to 5GHz WiFi, while running a speed test on https://fast.com, manages to kill that 5GHz signal for all household connected to that same AP.

Would you be able to help me identify the root cause?

[Edit]
This does not happen on every run, if I make 2-3 speed test attempts, usually only the first causes the above behaviour.
It does not happen when that same laptop is connected to 2.4GHz channel.

2

You are probably pegging the CPU on the hap ac since you are using capsman forwarding. Try local forwarding instead or get a faster device to be the capsman server.

3

Double checked this now, /tool profile on hAP ac is not climbing above 55% total usage.
I failed to mention, this happens only on that Lenovo laptop, I couldn’t reproduce the same behaviour on any other device.