# my custom layer recipe for network interface :

/poky/meta-custom/recipes-core/ifupdown$ tree
.
├── init-ifupdown
│   └── interfaces
└── init-ifupdown_%.bbappend

2 directories, 2 files

# cat init-ifupdown_%.bbappend
FILESEXTRAPATHS:prepend := "${THISDIR}/${PN}:"

# Interfaces file :
# /etc/network/interfaces -- configuration file for ifup(8), ifdown(8)

# The loopback interface
auto lo
iface lo inet loopback

# Wired or wireless interfaces
auto eth0

iface eth0 inet static
  address 169.254.1.100
  netmask 255.255.255.0