How to correctly set Mikrotik HT MCS?

Question

Mikrotik

What should be the logic in setting these options, given that this is a free public point for everyone who wants 2Ghz-B/G/N?
The settings are as follows:

Answer 1

Hey!
On the first plate, en.wikipedia.org/wiki/IEEE_802.11n-2009#Data_rates are enabled for speeds for mode n . Judging by the following screenshot, you are using it, so it is reasonable to put everything right. The first set of switches is what the point distributes as supported, the second set is what the client must support in order to connect.
In general, if you do not want to limit the speed, you can leave it as is.
High speed schemes: 13-15, 20-23, 27-31. They can be disabled in the HT Supported MCS item (they have a speed of more than 100 megabits, they obviously do not need you here).
On the second, correct Country - put Russia. Antena Gain is set in accordance with your antenna from its specification, according to this indicator (in dBi), the point determines the distance to the client and drops or allows its connection. Well, it's probably right to set the Default Client Tx Limit to the value - what speed do you provide to your clients (this is the easiest way to QoS).
Also update the firmware, in the latest version it became possible to specify auto instead of the channel , then there will be no problems with busy frequencies.

Answer 2

All points are clear, thank you, very detailed! Does it make sense to set the Default Client Tx Limit to 512k if I already cut the speed for clients on the bridge, through simple queues I make the target upload\download max limit to 512k?