networking – Ubuntu 16.04.1 dual nic only autostart one

I have a system running under 16.04.1 with two network cards. Each card is a different Internet provider and only one must be activated at a time. I was running 14.04 and the configurations were living in the / etc / network / interfaces location and I just had to change the auto line to #auto by commenting on the instruction. My problem is that the configurations are now in / etc / NetworkManager / system-connections and I can not find information on how to disable nic1 or nic2 on startup.

The configuration looks like something like this. Is there a document with all the configuration options for this file? I have searched but the information I find is for the other configuration location.

Thank you for your time.
Paul

[connection]



id = eno1
uuid = 4518f0a6-0500-4848-a849-85c0c6c389b6
type = 802-3-ethernet
permissions =
secondary =

[802-3-ethernet]
duplex = complete
mac-address = XX: XX: XX: XX: XX: XX

[ipv4]
method = manual
addresses1 = 192.168.1.251; 24; 192.168.1.1;

[ipv6]
addr-gen-mode = stable-privacy
dns-search =
method = auto[/code]