ansible-network-config/templates/interfaces.j2

auto lo
iface lo inet loopback
{% if host_loopback_IP is defined %}
auto lo:1
iface lo:1 inet static
        address {{host_loopback_IP}}/32
{% endif %}

{% if OOBNET_NIC is defined %}
auto {{OOBNET_NIC}}
allow-hotplug {{OOBNET_NIC}}
iface {{OOBNET_NIC}} inet {% if OOBNET_DHCP is defined and OOBNET_DHCP|lower == "true" %}dhcp{% else %}static
        address {{OOBNET_IP}}/{{OOBNET_Netmask}}
        {% if OOBNET_GW is defined %}gateway {{OOBNET_GW}}{% endif %}
{% endif %}
{% endif %}

{% if autobgp_interfaces is defined %}
{% for item in autobgp_interfaces %}

auto {{ item['name'] }}
allow-hotplug {{ item['name'] }}
iface {{ item['name'] }} inet {% if item['dhcp'] is defined and item['dhcp']|lower == "true" %}dhcp{% else %}static
    address {{host_loopback_IP}}/32
{% endif %}
{% if item['mtu'] is defined %}
	mtu {{ item['mtu'] }}
{% endif %}
{% if item['force10G'] is defined and item['force10G']|lower == "true" %}
	# Force speed to 10G
	post-up sudo ethtool -s {{ item['name'] }} autoneg off
	post-up sudo ethtool -s {{ item['name'] }} speed 10000
{% endif %}
{% if item['force40G'] is defined and item['force40G']|lower == "true" %}
	# Force speed to 40G
	pre-up sudo ethtool -s {{ item['name'] }} autoneg off
	pre-up sudo ethtool -s {{ item['name'] }} speed 40000
{% endif %}
{% if item['routes'] is defined %}
{%   for route in item['routes'] %}
up ip route add {{ route['network'] }} via {{ route['gateway'] }} || true
{% endfor %}
{% endif %}
{% endfor %}
{% endif %}

{% if addressed_interfaces is defined and addressed_interfaces != [] %}
{% for item in addressed_interfaces %}

auto {{ item['name'] }}
allow-hotplug {{ item['name'] }}
iface {{ item['name'] }} inet {% if item['dhcp'] is defined and item['dhcp']|lower == "true" %}dhcp{% else %}static
	address {{item['ip_address']}}/{{item['ip_netmask']}}
{% endif %}
{% if item['mtu'] is defined %}
	mtu {{ item['mtu'] }}
{% endif %}
{% if item['routes'] is defined %}
{%   for route in item['routes'] %}
up ip route add {{ route['network'] }} via {{ route['gateway'] }} || true
{% endfor %}
{% endif %}

{% endfor %}
{% endif %}

{% if bond_interfaces is defined and bond_interfaces != [] %}
{%   for item in bond_interfaces %}
{%   for slave in item['slaves'] %}
auto {{slave['name']}}
iface {{slave['name']}} inet manual
    bond-master {{ item['name'] }}
{% endfor %}

auto {{ item['name'] }}
iface {{ item['name'] }} inet {% if item['dhcp'] is defined and item['dhcp']|lower == "true" %}dhcp{% else %}{% if item['ip_address'] is defined %}static
	address {{item['ip_address']}}/{{item['ip_netmask']}}
{% else %}manual{% endif %}{% endif %}
{% if item['routes'] is defined %}
{%   for route in item['routes'] %}
up ip route add {{ route['network'] }} via {{ route['gateway'] }} || true
{% endfor %}
{% endif %}
{% endfor %}
{% endif %}

{% if vlan_interfaces is defined and vlan_interfaces != [] %}
{%   for item in vlan_interfaces %}
auto {{ item['name'] }}
iface {{ item['name'] }} inet {% if item['dhcp'] is defined and item['dhcp']|lower == "true" %}dhcp{% else %}{% if item['ip_address'] is defined %}static
	address {{item['ip_address']}}/{{item['ip_netmask']}}
{% else %}manual{% endif %}{% endif %}
{% if item['routes'] is defined %}
{%   for route in item['routes'] %}
up ip route add {{ route['network'] }} via {{ route['gateway'] }} || true
{% endfor %}
{% endif %}
{% endfor %}
{% endif %}

{% if unused_interfaces is defined and unused_interfaces != [] %}
{%   for item in unused_interfaces %}
allow-hotplug {{ item['name'] }}
iface {{ item['name'] }} inet manual
{% endfor %}
{% endif %}