I am missing something on a Debian 10 server: my network configuration is not applied on reboot or after the link is reset.
In my case, the server has two interface: eno3 (public) and eno4 (private). The eno3 interface is configured via DHCP. The eno4 is configured manually and is set for use in a VLAN.
To configure the private interface, the following commands were applied.
$ sudo apt-get install vlan
$ vconfig add eno4 3
$ ip addr add 172.16.2.0/24 dev eno4.3
$ ifconfig eno4.3 172.16.2.101 netmask 255.255.255.0
$ ip link set dev eno4 up
This makes the network work correctly. To make the configuration persistant, I created the following files :
/etc/systemd/network/eno4.3.netdev
[NetDev]
Name=eno4.3
Kind=vlan
[VLAN]
Id=3
/etc/systemd/network/eno4.network
[Match]
MACAddress=ac:1f:6b:xx:xx:xx (with real network adapter MAC instead of XX)
[Network]
Description=network interface on vrack network, with default route
VLAN=eno4.3
/etc/systemd/network/eno4.3.network
[Match]
Name=eno4.3
[Network]
Description="VLAN 3"
Address=172.16.2.1/24
I am not really sure this is the right way to do for this Debian 10 server as I also noticed some files are created in /etc/network/interfaces.d, for instance 50-cloud-init.
