Re: in /etc/network/interfaces: "auto" vs "allow-hotplug"
On Sat, 23 Sep 2017, Rick Thomas wrote:
> I have two machines (out of a group of ten) that will not bring up
> their ethernet interface at boot time if the interfaces is of type
> “allow-hotplug”. When I change that to “auto” the interface comes up
> at boot with no problem…
> Anybody have a clue as to what’s going on?
auto: try to ip link set <dev> up at boot. Best choice for
allow-hotplug: *wait* for kernel+drivers+udev to detect the device,
then ip link set <dev> up it. The only thing that can
deal with annoying USB, SDIO, etc.
This can be kinda important when non-auto-loading stuff is involved, or
when network file systems are involved.
So, look at what *exact* kind of network device you're dealing with.