Mikrotik loop protect

RouterOS General
1

Hello to everyone! First I want to apologize for my bad English. I’m from Bulgaria. My question may seem silly to you, but I don’t know how to formulate it with few words to look for literature on the theme

I have a mikrotik wireless connection from antenna A to antenna B

I have a backup wireless path that starts from antenna C located at the location of Antenna A, goes through antenna D, which is an intermediate point, and reaches antenna E, which is located at the location of Antenna B.

This is an example schematic. If the primary route fails, I activate the backup manually.

A few days ago I had to replace antenna A. Unplugging it, I noticed that the connection to the other side of the route stopped for about 30 seconds and then it restarted. I found that I forgot the backup connection active. When I was a student, we were taught that such a condition is called a loop and should not be allowed.
Further observations showed me that even if two points were connected in three or four different ways, the mikrotik devices always routed the traffic to the path of least resistance. Where the connection is best. No traffic goes through the weaker links until the best one drops. 30 seconds after the best one drops, traffic is automatically routed to the next best one.
Obviously, this is a very interesting feature of mikrotik devices to me. Do you think it is correct to leave both the main and backup traces on and what is this loop protection called on the mikrotik devices so I can read more about it?

Thanks in advance for the answers and once again I apologize for my bad English.

2

To protect against loops in networks is used protocol RSTP and devices Mikrotik support it, disconnecting the port on which detected a loop. This should be recorded in the logs. The best option in your case will be the mode when both channels will work in total and the drop of one will lead to a reduction in bandwidth, without complete loss of communication

3

It sounds GREAT! Can you told me how can it be done please!

4

/interface bridge set [find name=name_of_your_bridge] protocol-mode=rstp

5

@Kanzler, thank you!
“mode when both channels will work in total and the drop of one will lead to a reduction in bandwidth” - this sound very intersting. Can you tell me what is it name or, how to configure it? If you call me name I can read documentation,

6

Here are step by step instructions I think google translator will help if you have problems with the language. This shows the principle.
https://www.technotrade.com.ua/Articles/merging_wifi_channels_on_mikrotik_2013-12-14.php

7

Our languages ​​are Slavic (Ukrainian and Bulgarian) and honestly I was able to understand еasy 90% of what was written . Thanks again!