Set connection priority for Wifi access points (Linux, NetworkManager)

What do you want to do

My home Wifi access point can see both 5GHz and 2.4GHz. I want to connect to 5GHz as much as possible.

The access points are described as XXXXXXXXXXXX-a and XXXXXXXXXXXX-g, so please read as appropriate. The former is 5GHz and the latter is 2.4GHz.

What did you do

You have set the connection priority. First, check the priority.

$ nmcli -f NAME,TYPE,DEVICE,AUTOCONNECT,AUTOCONNECT-PRIORITY c
NAME             TYPE      DEVICE     AUTOCONNECT  AUTOCONNECT-PRIORITY 
XXXXXXXXXXXX-a wifi wlp0s20f3 yes 0
XXXXXXXXXXXX-g   wifi      --Yes 0

Increase the connection priority of XXXXXXXXXXXX-a. Larger values have higher priority.

$ nmcli connection modify XXXXXXXXXXXX-a connection.autoconnect-priority 10

Check if it has been changed properly.

$ nmcli -f NAME,TYPE,DEVICE,AUTOCONNECT,AUTOCONNECT-PRIORITY c
NAME             TYPE      DEVICE     AUTOCONNECT  AUTOCONNECT-PRIORITY 
XXXXXXXXXXXX-a wifi wlp0s20f3 yes 10
XXXXXXXXXXXX-g   wifi      --Yes 0

Priority changed from 0 to 10. I'm sure that this should give priority to the 5GHz connection.

Please

If you have any comments, please. Please give us a better method, the disadvantages of the above method, and a correction request.

--Environment - Debian bullseye - network-manager 1.26.0-1 amd64 --References -<qastack.jp> How to manage the priority of available wireless networks

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