Fresh install VE 7.4 - Network not initialized on boot

[k.m.]

Hi,
I'm running a small testsystem on a NUC from ASRock with Celeron Elkhardt J6412 and with two Realtek RTL8111/8168/8411 ethernet interfaces.
The system takes about two minutes to boot and leaves the ethernet interfaces offline and needs local shell access and running systemctl start networking to bring them up online.

My interfaces file looks like this:

auto lo

iface enp3s0 inet manual

auto vmbr0
iface vmbr0 inet static
    address 10.0.0.80/22
    gateway 10.0.0.1
    bridge-ports enp3s0 enp4s0
    bridge-stp off
    bridge-fd 0
   
iface enp4s0 inet manual

iface wlp2s0 inet manual

I can't find anything in the logs that would indicate that bringing up the interfaces failed and systemctl start networking brings up everythin just fine.

Does anyone have any ideas as to what I could be doing wrong?

Thanks!

Best Regards

 

[gurubert]

If you put both Ethernet interfaces into one bridge you will get a loop if they are physically connected to the same switch.