cat /etc/network/interfaces
# interfaces(5) file used by ifup(8) and ifdown(8)
# Include files from /etc/network/interfaces.d:
source /etc/network/interfaces.d/*
auto eth0
iface eth0 inet dhcp
hwaddress ether 00:11:32:86:24:6e
auto eth0:1
iface eth0:1 inet static
address 1.1.1.1
netmask 255.255.255.0