I recently had to modify the NIC setup and add a virtual nic. Thought I would save this.. as it was simple and thought i’d share. This is using the default ens160 interface, and a sub-interface on the same nic.
# This file describes the network interfaces available on your system
# and how to activate them. For more information, see interfaces(5).
source /etc/network/interfaces.d/*
# The loopback network interface
auto lo ens160 ens160:1
iface lo inet loopback
# The primary network interface
iface ens160 inet static
address 10.111.1.105
netmask 255.255.224.0
network 10.111.0.0
broadcast 10.111.31.255
gateway 10.111.0.4
dns-nameservers 8.8.8.8
dns-domain your-domain.com
dns-search your-domain.com
iface ens160:1 inet static
address 10.111.2.198
netmask 255.255.224.0
broadcast 10.111.31.255
network 10.111.0.0
# This file describes the network interfaces available on your system
# and how to activate them. For more information, see interfaces(5).
source /etc/network/interfaces.d/*
# The loopback network interface
auto lo
iface lo inet loopback
# The primary network interface
auto ens160
iface ens160 inet dhcp
