TerjeAFK wrote:Unmanaged switches do not participate in STP, ie. they do not send out BPDU. So if you are worried about loops involving those switches you should look at solutions like loop-protect (don't know if the 1920 supports this) or replacing all those unmanaged switches.
That's right for unmanaged switches.
You should have only 1920 and configure the MSTP tab :
