Comment 3 for bug 1748635

I see that your `interfaces` file contains lines like:

    auto p2p2 inet manual
    auto p5p1 inet manual
    auto p5p2 inet manual

These should instead be:

    auto p2p2
    auto p5p1
    auto p5p2

It seems that ifupdown is less strict than netplan about what it accepts after "auto". (I guess it ignores arguments that aren't interface names; I vaguely remember using syntax such as "auto eth0 eth1", but I'm not positive that works.)