Ethernet problem with Debian 10 Buster

Recently I have installed Linuxcnc 2.8 Debian 10, and I have problem with reconnecting ethernet. I am using MESA7i92 with standard config of static IP.
When operating system is rised up and when i switch on machine, eth communication is not working. I must restart network with ifdown "adapter_name" & ifup "adapter_name".
After that, everything works fine and it is communicating until next power off mesa card or unpluging network adapter.
It seems like loopback for finding network is not working.
On previous version, Debian 9 strech, everything works fine.
Interface configuration on address ../etc/network/interfaces loks like:

auto lo
iface lo inet loopback
auto lo enp0s25
#allow-hotplug enp0s25
iface enp0s25 inet static
address 10.10.10.1
netmask 255.255.255.0

I have even try with command allow-hotplug, but with no help.
Does anyone have same or similar problem?

I had same problem, in my case ethernet was working but I had problem with wireless.
The following steps fix everything.
PS be careful check your wireless network cards


How to install proprietary Broadcom wireless card driver to connect to the Internet through Wi-Fi in Debian

Supported Broadcom wireless network cards:
BCM4311-, BCM4312-, BCM4313-, BCM4321-, BCM4322-, BCM43142-, BCM43224-, BCM43225-, BCM43227-, BCM43228-, BCM4331-, BCM4360-, and BCM4352-

lspci -nn | grep Network

sudo apt-get install wireless-tools
sudo apt-get install network-manager-gnome
sudo apt-get install wpasupplicant

sudo nano /etc/apt/sources.list
(main contrib non-free)

sudo apt-get update

sudo apt-get dist-upgrade

reboot the computer

sudo apt-get install linux-image-$(uname -r|sed 's,[^-]*-[^-]*-,,') linux-headers-$(uname -r|sed 's,[^-]*-[^-]*-,,') broadcom-sta-dkms

sudo modprobe -r b44 b43 b43legacy ssb brcmsmac bcma

sudo modprobe wl

If you get frequent disconnections, it can be fixed with this command:
iwconfig wlan0 power off

auto lo
iface lo inet loopback
auto lo enp0s25
#allow-hotplug enp0s25
iface enp0s25 inet static
address 10.10.10.1
netmask 255.255.255.0

should be
auto lo
iface lo inet loopback
auto enp0s25
#allow-hotplug enp0s25
iface enp0s25 inet static
address 10.10.10.1
netmask 255.255.255.0

I have tried both suggestions, but no success. it seems like it is problem with network manager or with wifi and ethernet card. Sometimes I also had problem with wifi connection, it is disconnecting itself few times, and do not want to reconnect automatic.
I will try with different wifi usb addapter.
For now I have made solution that works, I have install debian 9 stretch 32bit, and update linuxcnc from 2,7 to 2,8.

This bad wlan behaviour seems to be a know issu, at least in newest raspbian. I'm struggling too, not lcnc, and gave up wlan. There is a auto restart of wifi somewhere in the www, but i did not get stable reconnect of all consumer's. F.x. The browser.

So damn disappointing! We waste man-years of valuable time distributing an ISO with Ethernet problems and, at the same time, providing absolutely no means of accessing Network Settings in any way. I've already wasted a hour trying to crack this riddle. Why doesn't the ISO install a Network Panel of any sort in the default installation? I can understanding keeping the system "lean" but, Holy bujeasus. Help Us all. What is the process for accessing and fixing the network settings which the installer seemed to recognize perfectly well during the installation of Debian 10 from the official ISO?

Well if networking is disabled initially maybe goal is to keep the application from being exposed to the wider network and let a security person worry about the networking part. Possibly?