[Samba] Automatic SMB3 negotiation

[Marcio Costa]

Hello.. My server have this settings in [global] section:

max protocol = smb3
min protocol = smb2

When I try connect to server using my clients (Centos 7.3/Ubuntu 16.04) I
can't because clients still trying NT1.

I must explicity add in smb.conf on clients the option ' client max
protocol = smb3' and the connections works again.

The question is:  If I have defined the min and max protocols in server, I
believe that the automatic negotiation between server and clients must use
smb2 or smb3, and the client should not try use another protocol (NT1).
I'm wrong ?

Regards!