I think I found the solution.
Debian for BB uses connman for handling eth0.
Found this that gives directions
https://variwiki.com/index.php?title=Static_IP_Address
So what I had to do was
As root
Find the service name by
$ connmanctl services
It will output something like
*AR Wired ethernet_d05fb8efd72f_cable
The latter part will be used as reference to what to change
$ connmanctl config --ipv4 manual 192.168.10.156 255.255.255.0
192.168.10.1
Where the order of the addresses are: ip netmask gateway
If you are on ethernet you will loose contact (in case the ip is changed),
connect again with the new address.
You also need to change the nameservers (better to do before)
$ connmanctl config --nameservers 8.8.8.8 4.4.4.4
onsdag 3 februari 2021 kl. 17:12:29 UTC+1 skrev Johan Ingvast:
> Hi
> I use Debian 10.3 on a beaglebone enhanced industrial and try to configure
> eth0 to a static ip.
> https://wiki.debian.org/NetworkConfiguration claim
> /etc/network/interfaces should have the lines
> auto eth0
> iface eth0 inet static
> address 192.168.10.156
> netmask 255.255.255.0
> gateway 192.168.10.1
>
> the commands ifup and ifdown should then take care of the switching.
>
> $ ifdown eth0
> results in an error
> ifdown: interface eth0 not configured
>
> When I reboot, I do get the right address and everything seem to work.
> However *the service networking.service gets an error.*
>
> Interestingly, the original version of /etc/network/interfaces does not
> mention eth0, yet it starts correctly. Is there some other mechanism
> starting it?
>
> What is the correct way of configuring static ip for eth0?
>
> best
> Johan Ingvast
>
>
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